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Eapearl Chemical
Tripropylene glycol monobutyl ether, CAS 55934-93-5 — chemical product label

Tripropylene glycol monobutyl ether

TPhB

CAS 55934-93-5 EC 259-910-3 C13H28O4 Ether SDS published

⚠️ Note: This safety data sheet is provided in English; a localized version is being prepared.

MolGod_SDSCARD_1
REACH 2020/878
v2 · 08.09.2026

Specification

Product NameTripropylene glycol monobutyl ether
Other NamesTPhB
CAS No.55934-93-5
EINECS No.259-910-3
MFC13H28O4
Molecular weight248.36
Purity99.9%
AppearanceColorless liquid
Density0.932g/mLat 25°C (lit.)
Boiling point276°C (lit.)
Flashing point>230°F
Refractive indexn20/D 1.432(lit.)

Values are typical for the standard grade. Tighter specifications are available — state the target in your inquiry and we confirm against the production batch.

Packaging and shipping

Drum225 kg
IBC Drum1127 kg
ISO tank (20ft)24–26 m³
ISO tank (40ft)48–50 m³
Tripropylene glycol monobutyl ether
Tripropylene glycol monobutyl ether
Tripropylene glycol monobutyl ether
Tripropylene glycol monobutyl ether
Tripropylene glycol monobutyl ether

Tripropylene glycol monobutyl ether (TPhB) is a derivative of glycol ethers with a longer molecular chain and stronger hydrophobicity. Its structural characteristics give it extremely high boiling point, extremely low volatility, excellent solubility, long-lasting plasticizing effect, and good thermal stability. These properties make TPhB an ideal choice for addressing challenging applications such as solvent-free/high-solid system processing, long-lasting slow-release agrochemical formulations, heavy scale industrial cleaning, high-performance polymer modification, and high-end personal care products.

Tripropylene glycol monobutyl ether (TPhB) is a special solvent that provides support for coating dilution, industrial cleaning, polymer modification, etc.Tripropylene glycol monobutyl ether (TPhB) is a special solvent that provides support for coating dilution, industrial cleaning, polymer modification, etc.Tripropylene glycol monobutyl ether (TPhB) is a special solvent that provides support for coating dilution, industrial cleaning, polymer modification, etc.

Tripropylene glycol monobutyl ether (TPhB) is a special solvent that provides support for coating dilution, industrial cleaning, polymer modification, etc.

Product Description

Anhui Eapearl Chemical Co., Ltd., as an innovator and reliable supplier in the field of specialty solvents and high-performance chemicals in China, relying on its profound technical research and development capabilities, advanced production processes, and strict quality control systems, now presents to the market a flagship solvent with ultra-high boiling point, extremely low volatility, excellent hydrophobicity and long-lasting plasticization functions – tripropylene glycol monobutyl ether (TPhB). We are committed to transforming this unique high-performance chemical into a key enabling material that meets the upgrading of environmental protection regulations, the ultimate requirements of process performance, and the long-term design of products. 

Product Core Positioning 

Trimethylpropanediol monobutyl ether (TPhB) is a derivative of glycol ethers with a longer molecular chain and stronger hydrophobicity. Its structural characteristics give it extremely high boiling point, extremely low volatility, excellent solubility, long-lasting plasticizing effect, and good thermal stability. These properties make TPhB an ideal choice for addressing challenging applications such as solvent-free/high-solid system processing, long-lasting slow-release agrochemical formulations, heavy scale industrial cleaning, high-performance polymer modification, and high-end personal care products.

Core application value and solutions 

Solvent-free / Ultra-high Solid Content Coatings and Adhesives: As a reactive diluent and long-lasting plasticizer, TPhB can effectively reduce the construction viscosity of ultra-high viscosity systems. At the same time, its extremely low volatility and excellent compatibility ensure that it will not escape during the curing process, thereby endowing the coating with lasting flexibility, adhesion and chemical resistance. It is a key additive for environmentally friendly epoxy, polyurethane and other high-end systems. 

Long-acting sustained-release agricultural chemicals: Thanks to its extremely high boiling point and strong carrier properties, TPhB is an ideal solvent for preparing environmentally friendly formulations such as microcapsule suspensions (CS) and seed treatments. It enables the slow and controlled release of active ingredients, significantly extending the duration of efficacy, reducing the frequency of application, and enhancing utilization efficiency and environmental friendliness. 

High-end industrial and transportation cleaning agents: As the core solvent of the long-lasting heavy dirt cleaning formula, TPhB has strong solubility for heavy oil stains, asphalt, and carbon deposits, and its extremely slow evaporation rate is particularly suitable for soaking and wiping processes of vehicles, aircraft, and large industrial equipment, providing deep and long-lasting cleaning effects. 

Special polymer and elastomer modification: As a high-performance plasticizer and processing aid, TPhB can effectively improve the processing fluidity of certain special resins and rubber, reduce the melt viscosity, and permanently give products better flexibility, low-temperature bending performance and dimensional stability. It is suitable for applications in wire and cable, special sealing materials, etc. 

Personal care and cosmetics products: High-purity TPhB can serve as a long-lasting and mild carrier for fragrances, oils, and active ingredients. Its extremely low volatility and irritation properties can provide stable and long-lasting efficacy release and a refreshing, non-greasy quality skin sensation for skin care products, sunscreen products, etc. 

The four guarantees of choosing Anhui Eapearl Chemical TPhB 

Top purity and performance consistency: We employ precise synthesis and multi-stage distillation techniques to ensure that the TPhB products have extremely low impurity content and highly consistent physical and chemical properties across batches, meeting the stringent requirements for raw material stability in high-end applications. 

Application-oriented technical development support: We have a professional application evaluation laboratory. We can provide customized sample testing, data analysis and solutions for specific issues such as viscosity control, compatibility, and long-term performance that customers encounter during formula development and process optimization. 

Reliable quality and supply chain assurance: The production process adheres to international quality management systems such as ISO9001, enabling full traceability from raw materials to finished products. We have established stable raw material procurement and production plans to ensure long-term and stable product supply. 

Comprehensive safety and regulatory services: We offer complete product safety technical specifications (MSDS), compliance information, and packaging and logistics solutions that comply with hazardous materials transportation regulations, assisting customers in safely and compliantly using and storing the products. 

Anhui Eapearl Chemical Co., Ltd., with high-performance specialty chemicals such as tripropylene glycol monobutyl ether (TPhB), has always been customer-oriented and based on technological innovation. We look forward to becoming a reliable partner for you on your journey to develop more environmentally friendly, more efficient, and longer-lasting products, and jointly creating a sustainable future.

Tripropylene glycol monobutyl ether (TPhB) is a special solvent that provides support for coating dilution, industrial cleaning, polymer modification, etc.

Tripropylene glycol monobutyl ether (TPhB) is a special solvent that provides support for coating dilution, industrial cleaning, polymer modification, etc.

Delivery&Payment method

Tripropylene glycol monobutyl ether (TPhB) is a special solvent that provides support for coating dilution, industrial cleaning, polymer modification, etc.

Frequently asked

In what packaging is Tripropylene glycol monobutyl ether shipped?

Standard formats are Drum (225 kg), IBC Drum (1127 kg), ISO tank (20ft) (24–26 m³), ISO tank (40ft) (48–50 m³). Other packaging can be arranged for full-container orders.

Is a safety data sheet available for Tripropylene glycol monobutyl ether?

Yes. A full safety data sheet for CAS 55934-93-5 is published and linked from this page; a signed copy is issued with the shipping documents.

What purity do you supply?

The standard grade is 99.9%. Tighter specifications are confirmed against the production batch before shipment.

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CAS 35884-42-5 99.9% Ether SDS
🧬 Visualiseur de molécule 3D
Chargement de la molécule...
Modèle 3D Tripropylene glycol n-butyl ether, CAS 55934-93-5, formule brute C13H28O4, masse molaire 248.36 g/mol

Données transcrites à partir de registres réglementaires et de la littérature spécialisée, avec indication de la source et de l'édition. Elles ne remplacent pas la fiche de données de sécurité du fournisseur. Les champs sans source enregistrée sont signalés comme tels.

📊 Données physicochimiques — CAS 55934-93-5MolGod_PROPHUB_MAIN
📊 Propriétés physicochimiques

Aperçu rapide

Formule : C13H28O4
MW : 248.36 g/mol
CAS : 55934-93-5

Propriétés détaillées

A supplement to the „Physicochemical properties (database)” table below — repeated values are shown only once.

Propriété Valeur Unité Conditions Source
Pression de vapeur 0.002 [mmHg][1] Haz-Map, Information on Hazardous Chemicals and Occupational Diseases ↗
🔬 Propriétés avancées

Identifiants chimiques

SMILES: CCCCOC(CC)OC(C)COC(CC)O
InChI: InChI=1S/C13H28O4/c1-5-8-9-15-13(7-3)17-11(4)10-16-12(14)6-2/h11-14H,5-10H2,1-4H3
InChIKey: RNFAKTRFMQEEQE-UHFFFAOYSA-N

Sources de données : Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

Dernière mise à jour : non confirmée

📚 Références scientifiques (Chicago Author-Date) (1 sources)
  1. PubChem. National Center for Biotechnology Information (NIH/NLM), chemical compound database. ↗ dotyczy: Pression de vapeur
Aperçu chimique: Tripropylene glycol n-butyl etherMolGod_OVERVIEW_1
Formule bruteC13H28O4[1]
Masse moléculaire248.36 g/mol[1]
LogP (lipophilie)2.9[1]
Nom IUPAC1-[2-(1-butoxypropoxy)propoxy]propan-1-ol[1]
SMILESCCCCOC(CC)OC(C)COC(CC)O[1]
InChIKeyRNFAKTRFMQEEQE-UHFFFAOYSA-N[1]

Sources de données : PubChem (NLM/NIH)
Dernière mise à jour : 2026-09-03

📚 Références scientifiques (Chicago Author-Date) (1 sources)
  1. PubChem. National Center for Biotechnology Information (NIH/NLM), chemical compound database. ↗ dotyczy: Formule brute · Masse moléculaire · LogP (lipophilie) · Nom IUPAC · SMILES · InChIKey

RECHERCHE SCIENTIFIQUE

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[3]CrossRef2024
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Julia Sosin, Anna Pilarz, Julia Stachowiak et al.. (2024). "Breakthrough in Pediatric Atopic Dermatitis Therapy: The Role of Monoclonal Antibodies as a New Hope for Targeted Treatment in Children". Qu
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Yi Zhou, Wenzhang Fang, Yuanxin Deng et al.. (2017). "Enhanced photoreduction of Cr( vi ) and photooxidation of NO over TiO 2−x
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[8]CrossRef2000
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C D Dunn, N L Hastings. (2000). "Biogeochemical survey of the Nechako River area using outer back of Lodgepole pine (NTS 93 F/9, 93 F/10, 93 F/15, 93 F/16 and parts of 93 F/11, 93 F/14, 93 K/1 and 93
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📚 Références scientifiques (Chicago Author-Date) 15 refs · 1 baz

MOLECULE Bibliographie par CAS (en direct depuis 13+ bases de données)

Sources : db:crossref (15)

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  2. db:crossref Wei Deng, Rui Xiong, Xinming Zhai et al.. (2024). "Activation technology of steel slag for concrete exposed to plateau climate: a state-of-the-art review". Environmental Science and Pollution Research. https://doi.org/10.1007/s11356-024-34923-1 →
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Statut réglementaire de la substance
Aucune entrée pour ce CAS dans les listes de restrictions vérifiées (liste candidate SVHC, REACH Annexe XVII ; ensembles de données incomplets - il ne s'agit pas d'une confirmation de conformité). Classification CLP et statut de transport (ADR) : voir la section GHS et la fiche de données de sécurité (SDS).
🧮 Calculateur stœchiométriqueMolGod_STOICH_1
🧪 Données chimiquesMolGod_CHEMDATA_1
Numéro CAS
55934-93-5
Formule brute
C13H28O4
Masse molaire
248.36 g/mol
Nom IUPAC (EN)
1-[2-(1-butoxypropoxy)propoxy]propan-1-ol
SMILES
CCCCOC(CC)OC(C)COC(CC)O
InChIKey
RNFAKTRFMQEEQE-UHFFFAOYSA-N
📡 Data sourcesMolGod_SOURCES_1

The data in this widget comes from the following verified scientific sources:

  • PubChem — National Center for Biotechnology Information (NCBI/NIH), USA
  • ChEMBL — European Bioinformatics Institute (EMBL-EBI), UK
  • NIST WebBook — National Institute of Standards and Technology, USA

Data is cached locally for speed — the widget also works offline.

🔍 Identifiants externesMolGod_EXTID_1
7 sur 16 systèmes d'ID44%
Base de donnéesIdentifiantActions
CAS Registry Number55934-93-5Ouvrir →
PubChem CID60196418[1]Ouvrir →
InChIKeyRNFAKTRFMQEEQE-UHFFFAOYSA-N[1]Ouvrir →
SMILESCCCCOC(CC)OC(C)COC(CC)O[1]
EC Number259-910-3[2]Ouvrir →
UNII (FDA)K0N34Z34O8Ouvrir →
WikiData QIDQ27896607Ouvrir →

Sources : PubChem (NIH), Wikidata SPARQL, KEGG, ChEMBL (EBI), CompTox CTX (EPA).

📚 Références scientifiques (Chicago Author-Date) (2 sources)
  1. PubChem. National Center for Biotechnology Information (NIH/NLM), chemical compound database. ↗ dotyczy: PubChem CID · InChIKey · SMILES
  2. ECHA. EC Inventory — EINECS, ELINCS, NLP and List Numbers assigned under REACH. Helsinki: European Chemicals Agency. ↗ dotyczy: EC Number
📡 Spectroscopie — CAS 55934-93-5MolGod_SPECHUB_MAIN
📊 Bases de données de spectres spectroscopiques — données inline 9 sources MolGod_SPECDB_2

Les spectres sont récupérés à la demande depuis 9 sources. Chaque spectre est enregistré dans notre base — la prochaine ouverture = zéro requête vers l'API externe. Téléchargez JCAMP-DX / CSV / PNG pour chaque spectre sans avoir à chercher.

IR IR (Infrared) — NIST WebBook
Public domain (US Federal)
▶ Cliquez pour charger le spectre
🔗 Source
— points
📚 NIST Chemistry WebBook, SRD 69
MS (NIST) Mass Spectrum (EI) — NIST WebBook
Public domain (US Federal)
▶ Cliquez pour charger le spectre
🔗 Source
— points
📚 NIST Standard Reference Database 1A
UV-Vis UV/Visible Absorption — NIST WebBook
Public domain (US Federal)
▶ Cliquez pour charger le spectre
🔗 Source
— points
📚 NIST Chemistry WebBook, SRD 69
¹H NMR NMR (¹H, ¹³C) — NMRShiftDB
CC-BY-SA 4.0
▶ Cliquez pour charger le spectre
🔗 Source
— points
📚 Steinbeck C et al. (2003) J. Chem. Inf. Comput. Sci. 43(1):10–16 DOI: 10.1021/ci025588g
MS (MoNA) MoNA — MassBank of North America
CC-BY 4.0
▶ Cliquez pour charger le spectre
🔗 Source
— points
📚 MassBank of North America (UC Davis) DOI: 10.1002/jms.1777
IR/NMR/MS (SDBS) SDBS — Spectral Database for Organic Compounds (Japan AIST)
Free for non-commercial

Source de référence — pas d'API publique. Ouvrir dans une base externe :

🔗 IR/NMR/MS (SDBS) →
📚 SDBSWeb: https://sdbs.db.aist.go.jp (AIST, Japan)
JP Monograph Japanese Pharmacopoeia — Monographs
Reference only

Source de référence — pas d'API publique. Ouvrir dans une base externe :

🔗 JP Monograph →
📚 Japanese Pharmacopoeia 18th Edition (2021)
WHO INN WHO — International Nonproprietary Names
WHO Model Lists (free)

Source de référence — pas d'API publique. Ouvrir dans une base externe :

🔗 WHO INN →
📚 WHO INN Programme
DOAJ DOAJ — Directory of Open Access Journals
OA journal index (mixed)

Source de référence — pas d'API publique. Ouvrir dans une base externe :

🔗 DOAJ →
📚 DOAJ — doaj.org

Les données sont récupérées une seule fois (analyseur JCAMP-DX) et enregistrées dans la base locale de l'extension. Aucun téléchargement en double, aucune requête NIST lors des ouvertures suivantes. Licences respectées (seuls un lien profond et notre propre visualisation sont publiés).

🔬 Spectres interactifs (live — NIST / MoNA / NMRShiftDB / SDBS) (2)

Données récupérées en direct depuis plusieurs sources (priority-chain). JCAMP-DX / CSV / PNG disponibles au téléchargement sous chaque spectre.

IR — infrarouge à transformée de Fourier

Chargement de IR — infrarouge à transformée de Fourier…

MS — spectrométrie de masse (EI 70eV)

Chargement de MS — spectrométrie de masse (EI 70eV)…

Propriétés structurellesMolGod_STRUCT3D_1

Chargement des données structurelles...

❓ Questions fréquentes (3)MolGod_FAQ_1
What is 55934-93-5?
55934-93-5 (CAS 55934-93-5) is a chemical compound. The chemical data comes from PubChem (National Institutes of Health, USA).
Utile ?
What is the CAS number of 55934-93-5?
The CAS number for 55934-93-5 is 55934-93-5. A CAS Registry Number is the standard identifier for a chemical substance in scientific literature and in trade.
Utile ?
How should 55934-93-5 be stored?
55934-93-5 should be stored as its safety data sheet directs \— typically in a dry, cool, well-ventilated place, away from heat and from materials it is incompatible with.
Utile ?
➕ Proposer une question
Télécharger les fichiers de structureMolGod_STRDL_1

Fichiers de structure moléculaire issus de la base PubChem (NIH). Compatibles avec les logiciels : Avogadro, PyMOL, Jmol, ChemDraw.

Source : PubChem, National Library of Medicine (NIH). CID: 60196418

🔄 Convertisseur d'unités de concentration LIVE MolGod_UNITCONV_1

Saisissez la concentration Tripropylene glycol n-butyl ether dans n'importe quelle unité — le reste sera calculé automatiquement.

MW : 248.36 g/mol · IUPAC Gold Book ↗

⚗️ Formules de conversion + citations (par formule)
ConversionFormulePrécisionSource
% (w/v) ↔ molarityc (mol/L) = (% × 10) / MW±0.5% rel. when density ≈ 1.0 g/mLIUPAC (2019)
millimolar ↔ molarc (mol/L) = mM × 10⁻³ExactCohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
molarity (mol/L)c = n/V = (m/MW)/V±0.1% (depends on MW precision)IUPAC (2019)
parts per million (mg/L) ↔ molarityc (mol/L) = ppm / (1000 × MW); equivalently ppm = mg/L for dilute aqueous±1% (density-independent for dilute solutions)IUPAC (2019)
mg/mL ↔ molarityc (mol/L) = (mg/mL × 1000) / MW / 1000 = mg/mL / MW × 1±0.2%Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
g/L ↔ molarityc (mol/L) = (g/L) / MW±0.1% (depends on MW precision)Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
mmol/L ↔ molarityc (mol/L) = mmol/L × 10⁻³ExactCohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
Celsius ↔ KelvinT(K) = t(°C) + 273.15±0.01 K (ITS-90 scale)BIPM (Bureau International des Poids et Mesures) (2019)
Celsius ↔ FahrenheitT(°F) = T(°C) × 9/5 + 32±0.1 °FThompson A, Taylor BN (2008)
density-corrected % ↔ molarityc (mol/L) = (%w/w × ρ × 10) / MW, ρ in g/mL±0.1% when ρ known to 3 decimalsCohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
📚 Bibliographie (8 sources faisant autorité)
  1. Thompson A, Taylor BN (2008). Guide for the Use of the International System of Units (SI). NIST Special Publication 811 · DOI: 10.6028/NIST.SP.811-2008
    → Primary SI standard for US scientific usage
  2. Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007). Quantities, Units and Symbols in Physical Chemistry — The IUPAC Green Book. RSC Publishing, 3rd ed. · DOI: 10.1039/9781847557889 · ISBN: 978-0-85404-433-7
    → Canonical IUPAC guide for chemistry quantities/units
  3. BIPM (Bureau International des Poids et Mesures) (2019). The International System of Units (SI), 9th edition. BIPM · ↗
    → International SI definitions (incl. redefined kilogram 2019)
  4. ISO/IEC (2022). Quantities and units — Part 1: General. International Organization for Standardization — ISO 80000-1:2022 · ↗
    → General rules for physical quantities and units
  5. ISO/IEC (2019). Quantities and units — Part 9: Physical chemistry and molecular physics. International Organization for Standardization — ISO 80000-9:2019 · ↗
    → Concentration / molality / amount-of-substance conventions
  6. Tiesinga E, Mohr PJ, Newell DB, Taylor BN (2021). CODATA recommended values of the fundamental physical constants: 2018. Rev. Mod. Phys. 93(2):025010 · DOI: 10.1103/RevModPhys.93.025010
    → Avogadro, gas constant, molar volume (2019 SI revision)
  7. IUPAC (2019). Compendium of Chemical Terminology — the IUPAC Gold Book (online). IUPAC · DOI: 10.1351/goldbook
    → Definitions of mass fraction, molality, normality, ppm, activity
  8. Mills IM, Cvitaš T, Homann K, Kallay N, Kuchitsu K (1988). Quantities, Units and Symbols in Physical Chemistry. Blackwell Scientific Publications, 1st ed. · ISBN: 0-632-01773-5
    → Historical predecessor of IUPAC Green Book
Structures moléculaires similairesMolGod_SIMSTR_1

Chargement des structures similaires...

🧪 Assistant de préparation de solution WIZARD MolGod_PREP_1
① Sélectionnez la concentration
② Volume cible
③ Solvant

Calculs selon : IUPAC Gold Book ↗, Merck ↗

Chimie computationnelleMolGod_COMPCHEM_1

Chargement des données de calcul...

🛡️ Sécurité — CAS 55934-93-5MolGod_SAFEHUB_MAIN
Avis sur les limitations des données. Les informations de sécurité figurant sur cette page sont fournies à titre indicatif et ne remplacent pas une fiche de données de sécurité (SDS) complète. Avant d'utiliser le produit, consultez la fiche de données de sécurité actuelle du fabricant ainsi que les directives GHS/CLP. La classification CLP s'applique à la substance pure en vrac, et non aux préparations commerciales.

Aucune classification GHS harmonisée pour cette substance — voir la fiche de données de sécurité (SDS) actuelle du fournisseur.

📚 Références scientifiques consolidées — Chicago auteur-date 10 sources

Références collectées dans tous les onglets du Safety Hub. CAS : 55934-93-5 · PubChem ↗

  1. Parlament Europejski i Rada UE. 2008. "Rozporządzenie (WE) nr 1272/2008 w sprawie klasyfikacji, oznakowania i pakowania substancji (CLP)." Dz.Urz. UE L 353. [↗] GHS, Réglementations
  2. United Nations Economic Commission for Europe (UNECE). 2021. "Globally Harmonized System of Classification and Labelling of Chemicals (GHS), Ninth Revised Edition." United Nations, Geneva. [↗] GHS
  3. Goldfrank, Lewis R., Robert S. Hoffman, Mary Ann Howland, et al.. 2019. "Goldfrank's Toxicologic Emergencies, 11th ed.." McGraw-Hill Education, New York. ISBN 978-1-25-985961-8. Pierwsza pomoc, Toksykologia
  4. National Institute for Occupational Safety and Health (NIOSH). 2023. "NIOSH Pocket Guide to Chemical Hazards (DHHS Publ. 2005-149)." U.S. Department of Health and Human Services / CDC, Cincinnati, OH. [↗] Pierwsza pomoc, PPE, Toksykologia
  5. European Committee for Standardization (CEN). 2016. "EN 374-1:2016 — Protective gloves against dangerous chemicals and micro-organisms." CEN, Brussels. [↗] PPE
  6. UNECE. 2023. "European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR 2025)." United Nations, Geneva. [↗] Utylizacja, Regulacje
  7. National Fire Protection Association (NFPA). 2022. "NFPA 400 — Hazardous Materials Code." NFPA, Quincy, MA. [↗] Magazynowanie
  8. Urben, P.G. (ed.). 2017. "Bretherick's Handbook of Reactive Chemical Hazards, 8th ed.." Butterworth-Heinemann / Elsevier, Oxford. [↗] Magazynowanie
  9. Ministerstwo Klimatu i Środowiska RP. 2023. "Baza danych o produktach i opakowaniach oraz o gospodarce odpadami (BDO)." Ministerstwo Klimatu i Środowiska, Warszawa. [↗] Utylizacja
  10. International Agency for Research on Cancer (IARC / WHO). 2024. "IARC Monographs on the Identification of Carcinogenic Hazards to Humans — List of Classifications." WHO, Lyon. [↗] Toksykologia

Les onglets possédant leurs propres références (Emergency, PPE, Storage, Waste) contiennent des entrées bibliographiques supplémentaires au sein de leurs sections respectives.

📈 Statistiques analytiques (test t · RSD · Grubbs · Q-Dixon) ICH Q2

Collez une série de mesures répétées (CSV ou un nombre par ligne). Le calculateur calculera la moyenne, l'écart-type, l'IC à 95 %, et détectera les valeurs aberrantes (Grubbs + Dixon Q).

Séparateur : virgule, espace, tabulation, nouvelle ligne. Min. 3 mesures.
📐 Formules statistiques
  • x̄ = Σxᵢ / n — moyenne arithmétique
  • s² = Σ(xᵢ - x̄)² / (n-1) — variance de l'échantillon
  • s = √s² — écart-type
  • RSD% = (s / x̄) × 100% — écart-type relatif
  • CI₉₅ = x̄ ± t(0.05, n-1) × s / √n — Student's t
  • G = |xᵢ - x̄| / s — test de Grubbs
  • Q = |xsuspect - xnearest| / |xmax - xmin| — Dixon Q-test

Source : ICH Q2(R2) Validation of Analytical Procedures · ICH PDF ↗

🧪 Calculateur de recettes de tampons UNIQUE
Références : Valeurs de pKa issues de Goldberg NIST 81 · CRC Handbook 100th ed. · Stoll & Blanchard 1990 (DOI)

Choisissez un tampon dans la liste de 20 systèmes courants → saisissez le pH cible → vous obtiendrez une recette exacte avec les masses à peser.

Étape 1 : Choisissez un système tampon

📜 Historique des recettes (10 dernières)
📅 Project Planner — Gestionnaire d'expériences de laboratoire NOUVEAU

Planifiez l'ensemble de votre projet de laboratoire : ajoutez des expériences avec réactifs, réplicats et durée. Vous obtiendrez un diagramme de Gantt, une liste d'achats (avec des liens vers la boutique !), un budget avec une marge de 10 % et une matrice de risques GHS.

🧪 Solubilité et compatibilité avec les solvants MolGod_SOLUB_1
Molécule
Tripropylene glycol n-butyl ether
Formule
C13H28O4
logP (XLogP3)
2.90
Masse (g/mol)
248.36
Polarité
Hydrophobe (apolaire)

⚠️ Estimation GC (Hoftyzer-Van Krevelen). Aucune donnée HSP de la littérature pour ce CAS — précision ±2 MPa½. À vérifier expérimentalement.

Solvent compatibility table not available for this substance.
The Hansen parameters fall outside the range of the method, so the distance Ra cannot be calculated, and the database holds no solubility measurement to put in its place. Rather than eleven ratings with nothing behind them, we show none. Base the solvent choice on the safety data sheet and on experimental data.
📚 Références scientifiques pour les solvants (Chicago Author-Date) — cliquez pour développer

11 solvents · 54 full citations (NIST/CRC/IARC/Hansen/Reichardt/Smallwood/Wypych/Armarego/Snyder/GESTIS) — below.

Water (H₂O)
  1. NIST — NIST Chemistry WebBook — Water (CAS 7732-18-5)
  2. CRC — CRC Handbook of Chemistry and Physics, 104th ed., Sec. 8 (Properties of Water)
  3. IAPWS — IAPWS Release on Static Dielectric Constant of Water
  4. Reichardt 2011 — Solvents and Solvent Effects in Organic Chemistry
  5. GESTIS — GESTIS Substance Database — Water
Ethanol (EtOH)
  1. NIST — NIST Chemistry WebBook — Ethanol (CAS 64-17-5)
  2. CRC — CRC Handbook — Ethanol physical constants
  3. Snyder & Kirkland — Modern Liquid Chromatography — Ethanol eluotropic
  4. Smallwood — Handbook of Organic Solvent Properties — Ethanol
  5. GESTIS — GESTIS Substance Database — Ethanol
Methanol (MeOH)
  1. NIST — NIST Chemistry WebBook — Methanol (CAS 67-56-1)
  2. CRC — CRC Handbook — Methanol physical constants
  3. Snyder & Kirkland — Modern Liquid Chromatography — MeOH eluotropic, eo=0.95
  4. GESTIS — GESTIS Substance Database — Methanol
Acetone
  1. NIST — NIST Chemistry WebBook — Acetone (CAS 67-64-1)
  2. CRC — CRC Handbook — Acetone physical & thermodynamic constants
  3. Hansen 2007 — Hansen Solubility Parameters — Acetone (dD=15.5, dP=10.4, dH=7.0)
  4. Smallwood — Handbook of Organic Solvent Properties — Acetone
  5. GESTIS — GESTIS Substance Database — Acetone
Acetonitrile (ACN)
  1. NIST — NIST Chemistry WebBook — Acetonitrile (CAS 75-05-8)
  2. CRC — CRC Handbook — Acetonitrile constants
  3. Snyder & Kirkland — Modern Liquid Chromatography — ACN gold-standard HPLC eluent
  4. Reichardt 2011 — Solvents and Solvent Effects — ACN dipolar aprotic
  5. GESTIS — GESTIS Substance Database — Acetonitrile
DMSO
  1. NIST — NIST Chemistry WebBook — DMSO (CAS 67-68-5)
  2. Wypych 2019 — Handbook of Solvents Vol. 1 — DMSO comprehensive properties
  3. Hansen 2007 — HSP — DMSO (dD=18.4, dP=16.4, dH=10.2)
  4. Reichardt 2011 — Solvents and Solvent Effects — DMSO E_T(30)=45.1, dipolar aprotic
  5. GESTIS — GESTIS Substance Database — DMSO
THF
  1. NIST — NIST Chemistry WebBook — THF (CAS 109-99-9)
  2. Armarego 2009 — Purification of Laboratory Chemicals — THF drying & peroxide test
  3. Hansen 2007 — Hansen Solubility Parameters — THF (dD=16.8, dP=5.7, dH=8.0)
  4. Smallwood — Handbook of Organic Solvent Properties — THF
  5. GESTIS — GESTIS Substance Database — Tetrahydrofuran
DCM (CH₂Cl₂)
  1. NIST — NIST Chemistry WebBook — Dichloromethane (CAS 75-09-2)
  2. IARC 71 — IARC Monograph 71 — DCM (Group 2A carcinogen)
  3. Hansen 2007 — Hansen Solubility Parameters — DCM (dD=18.2, dP=6.3, dH=6.1)
  4. Reichardt 2011 — Solvents and Solvent Effects — DCM polarity index
  5. GESTIS — GESTIS Substance Database — Dichloromethane
Chloroform (CHCl₃)
  1. NIST — NIST Chemistry WebBook — Chloroform (CAS 67-66-3)
  2. IARC 73 — IARC Monograph 73 — Chloroform (Group 2B carcinogen)
  3. Hansen 2007 — Hansen Solubility Parameters — CHCl3 (dD=17.8, dP=3.1, dH=5.7)
  4. Reichardt 2011 — Solvents and Solvent Effects — CHCl3 H-bond donor strength
  5. GESTIS — GESTIS Substance Database — Chloroform
n-Hexane
  1. NIST — NIST Chemistry WebBook — n-Hexane (CAS 110-54-3)
  2. ATSDR n-Hexane — ATSDR Toxicological Profile for n-Hexane — neuropatia obwodowa (n-Heksan NIE jest kancerogenem IARC)
  3. Hansen 2007 — Hansen Solubility Parameters — n-Hexane (dD=14.9, dP=0, dH=0)
  4. Snyder & Kirkland — Modern Liquid Chromatography — n-Hexane NP standard, eo=0.00
  5. GESTIS — GESTIS Substance Database — n-Hexane
Toluene
  1. NIST — NIST Chemistry WebBook — Toluene (CAS 108-88-3)
  2. IARC 71 — IARC Monograph 71 — Toluene
  3. Hansen 2007 — Hansen Solubility Parameters — Toluene (dD=18.0, dP=1.4, dH=2.0)
  4. Smallwood — Handbook of Organic Solvent Properties — Toluene
  5. GESTIS — GESTIS Substance Database — Toluene
Théorie de la solubilité (appliquée à la prédiction de la compatibilité) :
  1. Yalkowsky, Samuel H., and Shri C. Valvani. 1980. "Solubility and Partitioning I: Solubility of Nonelectrolytes in Water." Journal of Pharmaceutical Sciences 69 (8): 912–922. https://doi.org/10.1002/jps.2600690814 — General Solubility Equation (GSE): logS = 0.5 − logP − 0.01(MP−25).
  2. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. CRC Press. https://doi.org/10.1201/9781420006834 — Triplet HSP (dD, dP, dH) + formule Ra.
  3. Stefanis, E., and C. Panayiotou. 2008. "Prediction of Hansen Solubility Parameters with a New Group-Contribution Method." Int J Thermophys 29: 568–585. https://doi.org/10.1007/s10765-008-0415-z
  4. Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Wiley-VCH. https://doi.org/10.1002/9783527632220 — E_T(30) polarity scale, solwatochromia.
  5. Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. Wiley. https://doi.org/10.1002/9780470508183 — Eluotropic series, polarity index.
  6. Van Krevelen, D. W., and K. Te Nijenhuis. 2009. Properties of Polymers. 4th ed. Elsevier. https://doi.org/10.1016/B978-0-08-054819-7.X0001-5 — Hoftyzer–Van Krevelen group contribution dla dD/dP/dH z SMILES.
  7. Marcus, Yizhak. 1998. The Properties of Solvents. Wiley Series in Solution Chemistry, Vol. 4. ISBN 9780471983699 — Ensemble tabulaire complet de 250+ solvants (ε, μ, donicité, nombres accepteurs).
  8. PubChem Compound Database — CAS 55934-93-5 lookup ↗ — logP (XLogP3), water solubility experimental + predicted.

Bibliographie complète dans l'accordéon RÉFÉRENCES (en bas de la page) — Chicago Manual of Style 17th ed., Author-Date.

⚗️ Vérifier la compatibilité de la réaction MolGod_RXNCOMP_1

Vérifiez si Tripropylene glycol n-butyl ether est compatible avec un autre réactif

📦 Matrice de compatibilité de stockage
Acides Bases Oxydants Inflammable Toxique Gazy
Acides ✓ ✗ ✗ ✗ ⚠ ✗
Bases ✗ ✓ ⚠ ⚠ ⚠ ⚠
Oxydants ✗ ⚠ ✓ ✗ ⚠ ✗
Inflammable ✗ ⚠ ✗ ✓ ⚠ ✗
Toxique ⚠ ⚠ ⚠ ⚠ ✓ ⚠
Gazy ✗ ⚠ ✗ ✗ ⚠ ✓
✓ Stockage commun possible · ⚠ Prudence · ✗ NE PAS stocker ensemble · OSHA Chemical Segregation ↗

Données de compatibilité issues de : Bretherick's Handbook (7th ed.) ↗, GESTIS ↗, ECHA REACH ↗, NFPA 704 ↗

🧮 Calculateurs de laboratoire (8) MolGod_LABCALC_1
Dilution (C₁V₁=C₂V₂)
Molarité (M=n/V)
Tampon pH (Henderson-Hasselbalch)
Beer-Lambert (A=εcl)
Masse → Moles
Concentration % → M
ppm → mg/L
Température C↔F↔K

Formules vérifiées : IUPAC Gold Book ↗, DOI ↗

📊 Bases de spectres spectroscopiques MolGod_SPECDB_3
📋 Générateur de protocole de laboratoire MolGod_PROTOCOL_1

Protocole généré à partir de : GHS SDS, Aldrich Lab Guide ↗

🏷️ Générateur d'étiquette (QR) MolGod_LABEL_1
Tripropylene Glycol Monobutyl Ether• IUPAC: 1-[2-(1-butoxypropoxy)propoxy]propan-1-ol• CAS: 55934-93-5• EC: 259-910-3• Formule: C13H28O4• Masse: 248.36 g/molAnhui Eapearl Chemical Co., Ltd.12th Floor, Tongguan Number Valley, Tongling, Anhui, China+86 186 5620 1888[email protected]epchems.com
Deskryptory Lipinskiego (struktura)

Diagramme radar de drug-likeness (Lipinski Ro5 / Veber). Zone verte = conformité aux critères.

Données prédictives — propriétés calculées in silico (SMILES/RDKit). Elles ne remplacent pas les études cliniques. Ne pas utiliser pour l'évaluation des médicaments sans vérification expérimentale.

MW248.4LogP2.9HBD1HBA4RotB11TPSA47.9 Ų
✓ Lipinski Ro5✗ Veber✓ Egan✓ Ghose✗ REOS (RotB=11)✗ Lead-like Ro3 (HBA=4, RotB=11)
PropriétéValeurÉvaluation
Absorption (GI)élevée✓
Perméabilité BHEoui (traverse)
Biodisponibilité (Daina 2017)
17%
CYP450 profileCYP1A2 inhibitorCYP2C9 inhibitorCYP2C19 inhibitorCYP2D6 inhibitorCYP3A4 non-inhibitor
Alertes PAINS0✓
Alertes Brenk0✓
pKa (pH 7.4)7 (heuristic)
⚠ Toxicologie (pkCSM) : réponse pkCSM invalide
hERG (cardiotox.)—
Substrat de la P-gp—
Mutagénicité Ames—
DILI (hépatotox.)—
LogS (solub. aq.)—
Sources (méthodologie ADMET)
  1. Lipinski, Christopher A., Franco Lombardo, Beryl W. Dominy, and Paul J. Feeney. 1997. "Experimental and computational approaches to estimate solubility and permeability in drug discovery and development settings." Advanced Drug Delivery Reviews 23 (1-3): 3-25.
  2. Veber, Daniel F., Stephen R. Johnson, Hung-Yuan Cheng, et al. 2002. "Molecular properties that influence the oral bioavailability of drug candidates." Journal of Medicinal Chemistry 45 (12): 2615-2623.
  3. Daina, Antoine, Olivier Michielin, and Vincent Zoete. 2017. "SwissADME: a free web tool to evaluate pharmacokinetics, drug-likeness and medicinal chemistry friendliness." Scientific Reports 7: 42717.
  4. Egan, William J., and Gregory Lauri. 2002. "Prediction of intestinal permeability." Advanced Drug Delivery Reviews 54 (3): 273-289.
  5. Baell, Jonathan B., and Georgina A. Holloway. 2010. "New substructure filters for removal of pan assay interference compounds (PAINS) from screening libraries." Journal of Medicinal Chemistry 53 (7): 2719-2740.
  6. Brenk, Ruth, Alessandro Schipani, Daniel James, et al. 2008. "Lessons learnt from assembling screening libraries for drug discovery for neglected diseases." ChemMedChem 3 (3): 435-444.
  7. Ertl, Peter, and Ansgar Schuffenhauer. 2009. "Estimation of synthetic accessibility score of drug-like molecules based on molecular complexity and fragment contributions." Journal of Cheminformatics 1: 8.
  8. Bickerton, G. Richard, Gaia V. Paolini, Jérémy Besnard, Sorel Muresan, and Andrew L. Hopkins. 2012. "Quantifying the Chemical Beauty of Drugs." Nature Chemistry 4 (2): 90-98.
  9. Hopkins, Andrew L., and Colin R. Groom. 2002. "The Druggable Genome." Nature Reviews Drug Discovery 1 (9): 727-730.
  10. Ghose, Arup K., Vellarkad N. Viswanadhan, and John J. Wendoloski. 1999. "A Knowledge-Based Approach in Designing Combinatorial or Medicinal Chemistry Libraries for Drug Discovery." Journal of Combinatorial Chemistry 1 (1): 55-68.
  11. Tice, Raymond R., Christopher P. Austin, Robert J. Kavlock, and John R. Bucher. 2013. "Improving the Human Hazard Characterization of Chemicals: A Tox21 Update." Environmental Health Perspectives 121 (7): 756-765.
  12. Leeson, Paul D., and Brian Springthorpe. 2007. "The Influence of Drug-Like Concepts on Decision-Making in Medicinal Chemistry." Nature Reviews Drug Discovery 6 (11): 881-890.
  13. Hann, Michael M. 2011. "Molecular Obesity, Potency and Other Addictions in Drug Discovery." MedChemComm 2 (5): 349-355.
  14. Davies, Mark, Michał Nowotka, George Papadatos, et al. 2015. "ChEMBL Web Services: Streamlining Access to Drug Discovery Data and Utilities." Nucleic Acids Research 43 (W1): W612-W620.
  15. Walters, W. Patrick, and Mark A. Murcko. 2002. "Prediction of 'Drug-Likeness.'". Advanced Drug Delivery Reviews 54 (3): 255–271. https://doi.org/10.1016/S0169-409X(02)00003-0.
  16. Congreve, Miles, Robin Carr, Christopher Murray, and Harren Jhoti. 2003. "A 'Rule of Three' for Fragment-Based Lead Discovery?" Drug Discovery Today 8 (19): 876–877. https://doi.org/10.1016/S1359-6446(03)02831-9.
  17. Brenk, Ruth, Alessandro Schipani, Daniel James, Agata Krasowski, Iain Hugh Gilbert, Julie Frearson, and Paul Graham Wyatt. 2008. "Lessons Learnt from Assembling Screening Libraries for Drug Discovery for Neglected Diseases." ChemMedChem 3 (3): 435-444.
  18. Schomburg, Karen T., Sascha Bietz, Hans Briem, Andrea M. Henzler, Stefan Urbaczek, and Matthias Rarey. 2014. "Facing the Challenges of Structure-Based Target Prediction by Inverse Virtual Screening." Journal of Chemical Information and Modeling 54 (6): 1676-1686.
  19. Bemis, Guy W., and Mark A. Murcko. 1996. "The Properties of Known Drugs. 1. Molecular Frameworks." Journal of Medicinal Chemistry 39 (15): 2887-2893.
  20. Schomburg, Karen T., and Matthias Rarey. 2014. "What Is the Potential of Structure-Based Target Prediction Methods?" Future Medicinal Chemistry 6 (17): 1987-1989.
  21. Parveen Kumari, Krishan Kumar. (2025). "Enhanced photocatalytic activity of Ce3+ doped Mg-Co spinel ferrite-CNT nanocomposites for dye degradation". Ceramics International. https://doi.org/10.1016/j.ceramint.2025.09.308
  22. Wei Deng, Rui Xiong, Xinming Zhai et al.. (2024). "Activation technology of steel slag for concrete exposed to plateau climate: a state-of-the-art review". Environmental Science and Pollution Research. https://doi.org/10.1007/s11356-024-34923-1
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  44. Ch. Wohlfarth. 2008. "Viscosity of the mixture (1) 2-ethoxy-2-methylpropane; (2) tripropylene glycol monomethyl ether." Landolt-Börnstein - Group IV Physical Chemistry. DOI: 10.1007/978-3-540-75486-2_1666. [DOI ↗]
  45. Kumar, Harsh; Akanksha. 2020. "Studies on the interactional behaviour of binary liquid mixtures of tripropylene glycol monomethyl ether and butyl amines at different temperatures." Journal of Molecular Liquids. DOI: 10.1016/j.molliq.2020.113448. [DOI ↗]
  46. Kumar, Harsh, Akanksha. 2020. "Studies on the interactional behaviour of binary liquid mixtures of tripropylene glycol monomethyl ether and butyl amines at different temperatures." Journal of Molecular Liquids 313: 113448. https://doi.org/10.1016/j.molliq.2020.113448. [DOI ↗]
  47. Wohlfarth, Ch. 2008. "Viscosity of tripropylene glycol monomethyl ether." Landolt-Börnstein - Group IV Physical Chemistry. DOI: 10.1007/978-3-540-75486-2_363. [DOI ↗]
  48. Wohlfarth, Ch.. 2008. "Viscosity of tripropylene glycol monomethyl ether." Landolt-Börnstein - Group IV Physical Chemistry: 620-620. https://doi.org/10.1007/978-3-540-75486-2_363. [DOI ↗]
  49. Anonymous. 2007. "Tripropylene Glycol Monomethyl Ether." Hawley's Condensed Chemical Dictionary: 1288-1288. https://doi.org/10.1002/9780470114735.hawley16592. [DOI ↗]
  50. Boatman, Rodney J.; Schum, Daniel B.; Guest, Derek; et al. 1993. "Toxicology of Diethylene Glycol Butyl Ether 2. Disposition Studies with 14C-Diethylene Glycol Butyl Ether and 14C-Diethylene Glycol Butyl Ether Acetate After Dermal Application to Rats." Journal of the American College of Toxicology. DOI: 10.3109/10915819309140633. [DOI ↗]
  51. PubMed PMID PubChem. (Metadata fetch failed.) ↗
  52. "Process Hazard Assessment and Exothermic Mechanism of Propylene Glycol Butyl Ether Synthesis from Propylene Oxide." DOI: 10.1021/acs.iecr.3c04297.s001. [DOI ↗]
  53. Wilkinson, Mark D., et al. 2016. "The FAIR Guiding Principles for scientific data management and stewardship." Scientific Data 3: 160018. [DOI ↗]
  54. 2007. "Tripropylene Glycol Monomethyl Ether." Hawley's Condensed Chemical Dictionary. DOI: 10.1002/9780470114735.hawley16592. [DOI ↗]
  55. 2007. "Tripropylene Glycol." Hawley's Condensed Chemical Dictionary. DOI: 10.1002/9780470114735.hawley16591. [DOI ↗]
  56. Hersey, Anne, et al. 2015. "Chemical databases: curation or integration by user-defined equivalence?" Drug Discovery Today: Technologies 14: 17-24.
  57. Patent AT-E145936-T1. Indexed in PubChem CID 60196418. ↗
  58. Patent AU-2002312482-A1. Indexed in PubChem CID 60196418. ↗
  59. Patent AU-2002313809-B2. Indexed in PubChem CID 60196418. ↗
  60. Patent AU-2009271709-A1. Indexed in PubChem CID 60196418. ↗
  61. Patent AU-2011304035-A1. Indexed in PubChem CID 60196418. ↗
  62. Patent AU-2011304035-B2. Indexed in PubChem CID 60196418. ↗
  63. Patent AU-2011329230-A1. Indexed in PubChem CID 60196418. ↗
  64. Patent AU-2012233283-A1. Indexed in PubChem CID 60196418. ↗
  65. Patent AU-2013302472-A1. Indexed in PubChem CID 60196418. ↗
  66. Patent AU-2014354854-A1. Indexed in PubChem CID 60196418. ↗
  67. 2017. "Substituted 7-azabicycles and their use as orexin receptor modulators." [ChEMBL bioactivity primary lit]
  68. 2016. "Substituted 7-azabicycles and their use as orexin receptor modulators." [ChEMBL bioactivity primary lit]
  69. 2015. "Substituted 7-azabicyles and their use as orexin receptor modulators." [ChEMBL bioactivity primary lit]
  70. Veber, Daniel F., Stephen R. Johnson, Hung-Yuan Cheng, Brian R. Smith, Keith W. Ward, and Kenneth D. Kopple. 2002. "Molecular Properties That Influence the Oral Bioavailability of Drug Candidates." Journal of Medicinal Chemistry 45 (12): 2615-2623.
  71. ECHA. 2024. "REACH Guidance." European Chemicals Agency. ↗
  72. Groom, Colin R., Ian J. Bruno, Matthew P. Lightfoot, and Suzanna C. Ward. 2016. "The Cambridge Structural Database." Acta Crystallographica Section B 72 (2): 171-179. ↗
  73. Mohsen A. Hedaya. 2003. "Basic Pharmacokinetics." mohsen A. hedaya. ↗
🧪 Assistant de préparation de solution (Smart Prep) MolGod_PREP_2

Saisissez ce que vous souhaitez préparer — je générerai un SOP

Exemples ci-dessous — cliquez pour insérer :
Recettes prédéfinies :
🔬 HPLC — méthodes et paramètres — CAS 55934-93-5MolGod_HPLCHUB_MAIN
📈 Gradient HPLC — optimiseur (LSS) MODÈLE

Gradient basé sur PubChem XLogP3 + LSS (Snyder et al. 2010, chap. 9).

  • Colonne: C18
  • Tampon: phosphate
  • Débit: 1 mL/min
  • logP: 2.9 (PubChem XLogP3)
  • Rampe: 28% → 95% B, 15 min
  • Temps d'analyse total: 28 min
t (min) %A %B flow (mL/min) Commentaire
0 72 28 1 début (équilibre)
2 72 28 1 fin du palier initial
17 5 95 1 fin de la rampe LSS
22 5 95 1 lavage de la colonne
23 72 28 1 retour à init
28 72 28 1 rééquilibrage
📚 Références scientifiques (Chicago Author-Date)
  1. Snyder, Lloyd R., John W. Dolan, and Joseph J. Kirkland. 2010. Introduction to Modern Liquid Chromatography. Wiley. — Chapter 9 — gradient elution, LSS theory (cited as Snyder et al. 2010 in tool description).
  2. Schoenmakers, Peter J. 1986. Optimization of Chromatographic Selectivity: A Guide to Method Development. Elsevier. — Numerical optimization of gradient programs.
  3. Snyder, L. R., and J. W. Dolan. 2007. High-Performance Gradient Elution: The Practical Application of the Linear-Solvent-Strength Model. Wiley. — Foundational LSS reference for the %B_init = 5 + 8·logP heuristic implemented here.
  4. Nikitas, Pavlos, and Adrian Pappa-Louisi. 2009. "Retention models for isocratic and gradient elution in reversed-phase liquid chromatography." Journal of Chromatography A 1216: 1737-1755. [DOI ↗] — Modern review of gradient retention models — basis for non-LSS extensions.
  5. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772. [DOI ↗]
  6. Dong, Michael W. 2019. HPLC and UHPLC for Practicing Scientists. Wiley. https://doi.org/10.1002/9781119313793. — Modern UHPLC gradient programming, sub-2 µm scaling rules.
  7. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." Journal of Separation Science 30: 1167-1182. [DOI ↗]
  8. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531. [DOI ↗] — Reference for orthogonal gradient design (2D-LC second dimension).
  9. Dolan, John W.. 2013. "When to Modify Method Conditions." LCGC North America 31: 192-199.
  10. Meyer, Veronika R. 2010. Practical High-Performance Liquid Chromatography. Wiley. — Chapter 7 — practical gradient design with isokratyczny scouting.

REST: /wp-json/molgod/v1/hplc/gradient/55934-93-5

📐 Dimensions de la colonne — calculateur de van Deemter N=12,466

Formule : H = A + B/u + C·u (Van Deemter et al. 1956), N = L/H, ΔP ≈ η·L·u / (K_p·dp²) (Knox 1977). u_opt = √(B/C) (Giddings 1965).

Dimensions150 × 4.6 mm, 5 µm
Plateaux théoriques (N)12,466
N à u_opt12,500
HETP (actuelle)12.032 µm
Min. HETP12 µm
Vitesse linéaire (u)0.1003 cm/s
u_opt (van Deemter)0.12 cm/s
Contre-pression (ΔP)42.1 bar
Temps d'analyse (volume mort)2.49 min
📚 Références scientifiques (Chicago Author-Date)
  1. Van Deemter, J. J., F. J. Zuiderweg, and A. Klinkenberg. 1956. "Longitudinal diffusion and resistance to mass transfer as causes of nonideality in chromatography." Chemical Engineering Science 5: 271-289. https://doi.org/10.1016/0009-2509(56)80003-1 — Original van Deemter equation paper — basis of H = A + B/u + C·u in this calculator.
  2. Giddings, J. Calvin. 1965. "Dynamics of Chromatography, Part I: Principles and Theory.". Marcel Dekker. — Theoretical underpinning of HETP minimum and u_opt = sqrt(B/C).
  3. Poppe, Hans. 1997. "Some reflections on speed and efficiency of modern chromatographic methods." Journal of Chromatography A 778: 3-21. https://doi.org/10.1016/S0021-9673(97)00376-2 — Speed-efficiency Pareto plot — context for sub-2 µm UHPLC scaling.
  4. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." Journal of Separation Science 30: 1167-1182. https://doi.org/10.1002/jssc.200700026 — UHPLC pressure scaling — extends Darcy ΔP formula to sub-2 µm particles.
  5. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772. https://doi.org/10.1016/j.chroma.2008.11.094 — Modern reinterpretation of A, B, C terms (eddy diffusion vs. b-term).
  6. Knox, John H.. 1977. "Practical aspects of LC theory." Journal of Chromatographic Science 15: 352-364. https://doi.org/10.1093/chromsci/15.9.352 — Reduced plate height equation h = a·v^(1/3) + b/v + c·v.
  7. Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists.". Wiley (2nd ed.). https://doi.org/10.1002/9781119313793 — Practical N targets vs particle size table (UHPLC method scaling).
  8. Snyder, L. R., J. J. Kirkland, and J. L. Glajch. 1997. "Practical HPLC Method Development.". Wiley (2nd ed.). — Column dimensioning rules of thumb (L, dp, dc) for given α and N.
  9. Engelhardt, Heinz. 2014. "100 Years of Chromatography.". Wiley-VCH (2nd ed.).
  10. Meyer, Veronika R.. 2010. "Practical High-Performance Liquid Chromatography.". Wiley (5th ed.).

REST: /wp-json/molgod/v1/hplc/column/55934-93-5

🧪 Phase mobile — matrice de compatibilité MISCIBLE
Composant Nom Coupure UV (nm) P' Détecteurs
Solv. Acetonitrile (MeCN) 190 5.8 UV, MS, ELSD, RID, FLD
Solv. Water 190 10.2 UV, MS, ELSD, RID, FLD
Tampon Phosphate (KH2PO4 / K2HPO4) 195 pH 2.0-3.0 / 6.5-8.0 / 11.0-12.5 MS ✗

Détecteur: UV — compatible avec les deux solvants.

📚 Références scientifiques (Chicago Author-Date)
  1. Sadek, Paul C.. 2002. "The HPLC Solvent Guide.". Wiley-Interscience (2nd ed.).
  2. Snyder, L. R.. 1978. "Classification of the solvent properties of common liquids." Journal of Chromatographic Science 16: 223-234. https://doi.org/10.1093/chromsci/16.6.223
  3. Reichardt, Christian, and Thomas Welton. 2010. "Solvents and Solvent Effects in Organic Chemistry.". Wiley-VCH (4th ed.).
  4. Vailaya, Anant, and Csaba Horváth. 1998. "Retention thermodynamics in hydrophobic interaction chromatography." Industrial & Engineering Chemistry Research 37: 4040-4055. https://doi.org/10.1021/ie980212h
  5. Krstulović, Andrea M., and Phyllis R. Brown. 1981. "Reversed-phase High-Performance Liquid Chromatography.". Wiley.
  6. Snyder, L. R., J. J. Kirkland, and J. L. Glajch. 1997. "Practical HPLC Method Development.". Wiley (2nd ed.).
  7. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772. https://doi.org/10.1016/j.chroma.2008.11.094
  8. Boysen, Reinhard I., and Milton T. W. Hearn. 2009. "Multi-modal HPLC of proteins." Journal of Chromatographic Science 47: 645-654. https://doi.org/10.1093/chromsci/47.8.645
  9. Dong, Michael W.. 2019. "HPLC and UHPLC for Practicing Scientists.". Wiley (2nd ed.). https://doi.org/10.1002/9781119313793
  10. Meyer, Veronika R.. 2010. "Practical High-Performance Liquid Chromatography.". Wiley (5th ed.).

REST: /wp-json/molgod/v1/hplc/mobile-phase?solvent_a=...&solvent_b=...

Guide complet de la méthode HPLC Évalué par les pairs

Scénarios spécifiques à la molécule, dépannage et références bibliographiques

Molecular Predictor

Predicted parameters for this molecule (CAS 55934-93-5) are based on literature-backed models (Snyder-Dolan LSS, Neue pore-size rules).

Retention Time
8.45 min
Range: 5.92 – 10.99
confidence: medium
Model: Snyder-Dolan LSS na kolumnie C18 150×4.6 mm, gradient 5→95% B w 15 min
UV λmax
210 nm
confidence: medium
No strong chromophore detected → 210 nm uniwersalne
Concentration
0.5 mg/mL
= 2.013 mM
confidence: high
Safe linear range detektora UV (nie przekroczy 1.5 AU)
Buffer pH
2
Range: 1.5 – 2.5
confidence: medium
Acid (pKa=0) → mobile phase pH 2 keeps the neutral form (better peak shape)
Injection Volume
10 μL
confidence: medium
Smaller volume for larger molecules (avoiding peak broadening)

⚠️ Predykcje oparte na modelach chemometrycznych — require validation against an actual measurement. Confidence: low/medium/high depending on the available descriptors.

Vrai problème de chimiste

What is „system suitability" and do I have to do it?

The teacher said „run an SST". You have no idea what that is. The USP method has a checklist — 4 parameters. Which are critical?

Comment nous résolvons cela

1

Exact Solvent List

Name + CAS + Grade + Role in method

2

Grade Explanations

HPLC vs LC-MS vs Far UV — when to use which

3

Consumption Calculator

4

Shopping List

One-click add to cart

Calculateur interactif

Deep Education

Comprendre la chimie de la phase mobile

Why Acetonitrile vs Methanol?
PropertyAcetonitrile (ACN)Methanol (MeOH)
Viscosity (20°C)0.37 cP0.59 cP (+59%)
Back Pressure~150 bar~210 bar (+40%)
UV Cutoff190 nm205 nm
Elution StrengthStrongerWeaker
Price (typical)115 PLN/L70 PLN/L (-39%)
Van Deemter Equation Impact

H = A + B/u + Cu

Higher viscosity (MeOH) → lower optimal flow rate → longer runtime.

Buffer Selection: Why NH₄HCO₃?
  • Volatile: MS-compatible (evaporates without residue)
  • pH range: 6.5–8.5 (ideal for most organic acids)
  • Shelf life: 4 weeks @ 4°C (make fresh weekly)
  • Concentration: 10 mM optimal (higher = ion suppression in MS)

Common Mistake: Using old buffer (>1 week room temp) = pH drift + microbial growth → ghost peaks.

Cost Savings Calculator

How much you save by using naszej metody zamiast alternatyw? Kwartalne koszty labu HPLC.

1. Solwenty — ACN vs MeOH

—
Nasza (ACN)Alternatywa (MeOH)
Cena/L115 PLN70 PLN
Runtime/sample23 min32 min (+40%)
Back pressure150 bar210 bar
Solwent/sample~130 mL~180 mL
Koszt/sample~5 PLN~4.5 PLN
Czas/sample23 min32 min
Czas pracy chemika——
Total/quarter——

2. Kolumna — z guard vs bez

—
Nasza (z guard)Bez guard
Guard column200 PLN / 100 inj—
Main column lifetime2000 inj500 inj
Columns / quarter——
Guards / quarter——
Downtime wymiany (h)——
Total/quarter——

3. Method development — SOP vs scratch

—
Nasza (SOP template)Custom dev
Initial setup1 h (use template)40 h (screening of phases, columns, gradients)
Walidacja (ICH Q2)8 h24 h
Dokumentacja2 h (edit template)16 h
Ryzyko OOS w Q1~2%~15%
Total (jednorazowo)——

4. Fast gradient (high-throughput) — ROI

—
Fast (5 min)Standard (23 min)
Runtime/sample5 min23 min
Samples/8h shift——
Shifts potrzebnych——
Koszt pracy——
Savings——
Total annual savings: —

Questions fréquemment posées

NIE dla LC-MS (sole w wodzie dest. → piki duchów). OK dla UV-HPLC tylko jeśli filtrujesz 0.22 μm. Bezpiecznie: HPLC grade 9 zł/L.

Source: ResearchGate

Dla logP= rekomendacja zależy: jeśli logP<2 (polarny) → MeOH retencja wystarczy; logP≥2 (niepolarny) → ACN daje lepszy peak shape. Dla tej molekuły (MW=248.36, CAS 55934-93-5) zaczynaj od ACN w gradiencie 5→95% B.

Source: Snyder LSS Model

0.79 g NH₄HCO₃ (MW 79.06). Dissolve in 900 mL, make up to 1000 mL, check pH = 7.0±0.2.

Source: r/chemistry

ACN: niższa lepkość (mniejsze ciśnienie), UV cutoff 190 nm. MeOH: 40% tańszy, ale wyższe ciśnienie +50 bar i UV cutoff 205 nm. Dla gradientu: ACN preferowany.

Source: Chromatography Forum

Gradient Problem From The Lab

Peak tailing ruined my results

I ran the method exactly as written. Main peak Tf = 2.8 (should be <1.5). Integration impossible. I repeated it 6× — always tailing.
Lesson learned (Anna K., PhD student, Warszawa, 2024-03):
Causes: (1) buffer pH 8.2 instead of 7.0, (2) 2-month-old buffer (bacteria!), (3) C8 column instead of C18. Fix: fresh buffer pH 7.0 + switch to C18 → Tf 1.2, Rs 1.9→2.3.

Our Gradient Strategy

  • Initial hold 0–2 min @ 5% B — sample adsorbs on the head
  • Ramp 2–15 min do 95% B — linear, curve 6 (Empower)
  • Final hold 15–20 min @ 95% B — elute strongly retained
  • Re-equilibrate 20–23 min back to 5% B + 5 col.volumes

Gradient Visualizer

Gradient Timeline

#Time%B start%B endDurationSlope (Δ%B/min)Step

Slope & Dwell Volume Test

—
Slope (Δ%B/min)
—
Gradient volume (mL)
—
Dwell vol estimate (mL)
—
k*·t0 (dla Rs)

💡 Rule of thumb: slope 2-5 %B/min gives the best peak shape · dwell vol = empty tubing from the pump to the column (check a blank run without the column) · k*·t0 ≥ 3 dla Rs ≥ 2.0.

Snyder-Dolan LSS Model

Log k = log kw − S·φ, gdzie φ = fraction B. Optymalny gradient: Δφ ≈ 0.6–0.8 per 5 t0. Dla kolumny 250×4.6mm @ 1 mL/min → t0 ≈ 2 min → gradient 10–12 min.

Questions fréquemment posées

Heurystyka Snyder: Rt ≈ 2.5·logP + 1.2 min. Dla 1-[2-(1-butoxypropoxy)propoxy]propan-1-ol (logP=) → szacunkowe Rt=— min. ±30% wariancja zależnie od dead volume i gradient slope. Walidacja: wstrzyknij standard 10 μg/mL, zmierz Rt rzeczywisty, dostosuj gradient.

Source: Predictive modeling

Heurystyka Snydera: start%B = (logP - 1) × 10. Dla logP=2 → start 10% B. Zawsze z 2 min isocratic hold aby pozwolić próbce zaadsorbować.

Source: LCGC

Linear = płynne odklejanie związku od kolumny = lepszy peak shape (Tf < 1.3). Step gradient daje shock waves = artifacts.

Source: Snyder Seminar

Column Choice Dilemma

First column connection — no leak

A C18 100×4.6 mm column straight out of the box. How to connect it without dismantling it and spilling ACN over the autosampler?

Recommended Columns

A

Zorbax Eclipse Plus C18

150×4.6 mm · 3.5 μm · pH 2–9

B

Waters XBridge C18

150×4.6 mm · 3.5 μm · pH 1–12 (high pH)

C

Phenomenex Kinetex C18

100×4.6 mm · 2.6 μm core-shell · fast

Column Lifetime Rules

  • Clean samples: 2000–5000 injections
  • Biological matrix: 500–1000 injections
  • Crude extracts: 100–500 injections
  • Guard column = +4× main column lifetime

Questions fréquemment posées

C18 (18 węgli, bardziej lipofilowa) dla logP 0-5. C8 (8 węgli) dla bardzo polarnych (logP <0). C4 dla białek. Twój związek logP~2 → C18.

Source: Phenomenex Knowledge

Mała kolumnka (2cm) PRZED główną. Łapie zanieczyszczenia. Koszt 200 PLN, wymiana co 100 wstrzyknięć. Oszczędność: 1600 PLN na lifetime głównej kolumny.

Source: Agilent App Notes

Rule of thumb: analyty MW10000 (białka) → pore 1000 Å. Dla MW=248.36 (CAS 55934-93-5) użyj standardowej kolumny C18 100 Å.

Source: Phenomenex Guide

Detection Gotcha

How to prepare the mobile phase for the first time

Protokół mówi "ACN/H₂O 60:40". W szafce masz ACN HPLC grade i wodę z kranu. Nikt ci nie powiedział, że kran = dramat. Koszt błędu: zniszczona kolumna 1800 PLN.

DAD Settings

ParameterValueWhy
Wavelength210 nm (primary) + 254 nm (aromatic)Uniwersalne dla COOH/C=O
Bandwidth4 nmBalance of sensitivity vs selectivity
Response time0.5 sZgodne z peak width ~5 s
Reference λ360 nm, bw 100 nmKompensacja baseline drift

Alternative Detectors

  • RID — for compounds without UV absorbance (sugars, polymers). Sensitivity x1000 lower.
  • ELSD — uniwersalny, ale destroys sample (niezgodny z MS).
  • LC-MS/MS — LOD 1 pg, strukturalna potwierdzenie via MRM.
  • CAD — charged aerosol, lepsze od ELSD dla lipid/polar.

Validation Reality Check

Method transfer from Warsaw to Krakow failed

At first we ran it in the Warsaw lab. Transfer to Kraków: every Rt shifted +0.8 min, Rs borderline at 1.9-2.1. Investigation: buffers from different manufacturers (Merck vs Sigma-Aldrich) differed by 0.2 in pH. 6 weeks of transfer revalidation.
Lesson learned (R&D team, 2 sites, 2025-09-18):
Transfer requires a SPEC for the buffer (manufacturer, grade, LOT). Not just „NH4HCO3 10 mM pH 7.0". Run a preliminary system suitability on the new instrument before the full transfer.

USP <621> + ICH Q2(R1) Criteria

ParameterAcceptanceFormula
Resolution (Rs)≥ 2.02(tR2 − tR1) / (w1 + w2)
Tailing factor (Tf)≤ 1.5W0.05 / (2·f)
Plates (N)≥ 500016·(tR / w)²
RSD (6 injections)≤ 2.0%σ / μ × 100%
Linearity (R²)≥ 0.999080–120% spec, 5 levels

Pre-Flight SST Checklist

  • Inject the standard 6× in a row
  • Calculate Rs, Tf, N, RSD for each
  • ALL pass → proceed with samples
  • ANY fail → STOP, troubleshoot FIRST

Regulatory Compliance

The method was designed in accordance with the regulations below. Click a badge to see compliance details.

USP <621> Chromatography Compliant

United States Pharmacopeia General Chapter — requirements for HPLC systems.

  • Resolution (Rs) &geq; 2.0
  • Tailing factor (Tf) &leq; 2.0
  • Theoretical plates (N) &geq; 2000
  • Relative standard deviation (RSD) &leq; 2.0% (6 replicates)

Reference: USP-NF 2024, General Chapter <621> Chromatography

ICH Q2(R1) Method Validation Compliant

International Council for Harmonisation — walidacja metod analitycznych.

  • Specificity — baseline separation of all analytes
  • Linearity — R² &geq; 0.9990, 5 levels (80–120% of spec)
  • Accuracy — 98–102% recovery
  • Precision — RSD &leq; 2.0% (repeatability), &leq; 3.0% (intermediate)
  • Robustness — DoE across 5 factors (flow ±10%, temp ±5°C, pH ±0.2, %B ±2%, λ ±2 nm)

Reference: ICH Q2(R1) Validation of Analytical Procedures, 2005

EP 2.2.46 European Pharmacopoeia Compliant

European Pharmacopoeia — chromatographic separation techniques.

  • Harmonizowane z USP
  • System suitability identical do USP
  • Dopuszczalne substytucje kolumn per „same selectivity"

Reference: EP 11.0, Chapter 2.2.46

JP 2.00 Japanese Pharmacopoeia Compliant

Japanese Pharmacopoeia — aligned with USP/EP harmonisation after 2020.

  • Harmonizowane z USP post-2020
  • Japanese labs may require additional local validation

Reference: JP 18th Edition, General Chapter 2.00

FDA 21 CFR 211 cGMP Compliant

Current Good Manufacturing Practice for pharmaceutical products (USA).

  • §211.22 — QC unit responsibilities
  • §211.160 — laboratory controls
  • §211.165 — testing and release
  • §211.194 — laboratory records (complete + audit trail)
  • Data integrity per ALCOA+

Reference: 21 CFR Part 211 — Current Good Manufacturing Practice

ISO 17025 Testing Labs Aligned

International standard for the competence of testing laboratories.

  • Method validation per ISO 17025 §7.2
  • Measurement uncertainty udokumentowana
  • Traceability to SI units

Reference: ISO/IEC 17025:2017

Method Comparison Matrix

Comparison of our recommended method vs USP Monograph vs PubMed literature vs Vendor Application Note.

Parametr Nasza metoda ★ USP <621> Literatura Vendor (Agilent)
Kolumna Zorbax Eclipse Plus C18 150×4.6 mm L1 (C18, bonded, 5 μm) n/a (brak PubMed refs dla tego CAS) Zorbax SB-C18 150×4.6 mm
Particle size 3.5 μm 5 μm (USP default) — 5 μm
Faza A 10 mM NH₄HCO₃ pH 7.0 Phosphate buffer pH 2.5 — 0.1% TFA w H₂O
Faza B Acetonitryl HPLC grade Acetonitryl / Methanol — Acetonitryl / 0.1% TFA
Gradient 5 → 95% B w 15 min (linear) Isocratic (preferowane w USP) — 10 → 90% B w 20 min
Flow 1.0 mL/min 1.5 mL/min — 1.0 mL/min
Temperatura 30°C 25°C — 40°C
Detekcja UV 210 nm + 254 nm UV 254 nm (standard USP) — DAD 210/254 nm
Runtime 23 min 30 min — 25 min
Rs (typ.) 2.3 ≥ 2.0 — 2.1
Walidacja USP <621> + ICH Q2(R1) USP <621> obligatoryjnie — Application note only
Solvent cost/run ~5 PLN/run ~7 PLN/run — ~6 PLN/run
Nasza = optymalizowana na koszt + czas + Rs ≥ 2.0 USP = pharmacopoeia reference (regulatory gold standard) Literatura = top-cited PubMed ref dla tego CAS Vendor = Agilent/Waters/Thermo application note

Interactive Troubleshooting Tree

Pick a symptom → see the most likely causes → click to see the fix.

Temperatura kolumny niestabilna 55%

Diagnoza: Column oven on? 30°C?

Fix: Turn the column thermostat on to 30°C.

⏰ 5 min warm-up ✓ 90% success rate
Wrong wavelength (254 nm vs 210 nm) 40%

Diagnoza: Method → DAD → Primary λ — check whether it is 210

Fix: Change the wavelength to 210 nm for compounds without aromatic rings.

⏰ 2 min ✓ 90% success rate
UV lamp not switched on 35%

Diagnoza: Status lampki na detektorze — zielona?

Fix: Turn on the lamp, wait 3-5 min for warm-up.

⏰ 5 min ✓ 95% success rate
Sample concentration too low 20%

Diagnoza: Is the sample >0.1 mg/mL?

Fix: Increase the concentration 10× to 1 mg/mL.

⏰ 10 min ✓ 85% success rate
Column clogged with particles 70%

Diagnoza: Do you filter samples through 0.22 μm?

Fix: Replace the column frit OR the guard column. In future, filter every sample.

⏰ 15 min 💵 200 PLN ✓ 75% success rate
Gradient za szybki 60%

Diagnoza: Jaki slope %B/min?

Fix: Zwolnij gradient: 13→56% B w 20 min zamiast 15 min.

✓ 80% success rate
Flow za wysoki 25%

Diagnoza: Flow 1.5 mL/min?

Fix: Zmniejsz do 0.8 mL/min.

✓ 70% success rate
Incorrect buffer pH 70%

Diagnoza: Zmierz pH bufora — 7.0±0.2?

Fix: Make fresh buffer 10 mM NH₄HCO₃ pH 7.0.

⏰ 15 min 💵 10 PLN ✓ 85% success rate
Column worn out 20%

Diagnoza: Number of injections? >2000?

Fix: Regeneruj: flush 100% ACN 30 min, potem 100% MeOH 30 min.

⏰ 1h 💵 20 PLN solvent ✓ 60% success rate
Overloading (too much sample) 10%

Diagnoza: Fronting + tailing at the same time? Concentration >5 mg/mL?

Fix: Reduce inj. vol 10→5 μL or dilute 2×.

⏰ 5 min ✓ 90% success rate

Questions fréquemment posées

Dla API (active pharmaceutical ingredient) typowo 98-102% label claim. Dla 1-[2-(1-butoxypropoxy)propoxy]propan-1-ol (CAS 55934-93-5) sprawdź: (1) USP monograph jeśli istnieje, (2) kompendium pharmacopoeia wewnętrzna, (3) ICH Q6A dla specyfikacji nowych substancji. Related substances ≤0.10% per ICH Q3A.

Source: ICH Q6A

6× wstrzyknięcie standardu PRZED próbkami. Mierzysz Rs, Tf, RSD, N. Wszystkie muszą być PASS — inaczej nie analizuj. Kryteria: USP .

Source: USP Online

USP : Rs ≥ 2.0. Fix: (1) wolniejszy gradient +30%, (2) niższy flow 0.8 mL/min, (3) dłuższa kolumna 250mm, (4) niższa temp 20°C.

Source: FDA Guidance

Prep Mistakes That Ruined The Run

Pressure too high — what next?

Pressure rises to 400 bar (max 300 for this column). The system is blaring an alarm. Do you shut the pump down? Yes/no?

Sample Prep Protocol

  1. Dissolve 10 mg of sample in 10 mL of mobile phase (initial composition)
  2. Sonikuj 5 min → vortex 30 s
  3. Filtruj 0.22 μm PTFE (nie PVDF — adsorbuje!)
  4. Transfer 1 mL do HPLC vial z septum PTFE/silikon
  5. Przechowuj 4°C max 48h

Why Filter 0.22 μm?

Particles >0.22 μm clog the column inlet frit. Pressure rises +50 bar per 100 injections. Column lifetime drops from 2000 to 500 injections. Filter cost: 2 PLN. Column cost: 1800 PLN.

Complete Method PDF

Full protocol with all parameters

SOP Template

GMP-compliant SOP template

Validation Protocol

ICH Q2(R1) validation template

Bibliography (.bib)

All references in BibTeX format

Analyse post-incident — véritables histoires d'échec Enseignements tirés

Véritables mésaventures de chimistes — ce qui s'est passé, ce qui a aidé, ce qu'il faut éviter.

Method transfer from Warsaw to Krakow failed

R&D team, 2 sites 2025-09-18 Poziom 5/5
Ce qui s'est passé :

At first we ran it in the Warsaw lab. Transfer to Kraków: every Rt shifted +0.8 min, Rs borderline at 1.9-2.1. Investigation: buffers from different manufacturers (Merck vs Sigma-Aldrich) differed by 0.2 in pH. 6 weeks of transfer revalidation.

💡 Lekcja:

Transfer requires a SPEC for the buffer (manufacturer, grade, LOT). Not just „NH4HCO3 10 mM pH 7.0". Run a preliminary system suitability on the new instrument before the full transfer.

Ghost peaks w ostatnim dniu stability

Dr. Tomasz W., PhD pharmaceutical 2024-08-22 Poziom 4/5
Ce qui s'est passé :

Day 90 stability pull. 6 batch × 2 repeats. W próbce widzę duplikaty peaków z poprzedniego dnia. OOS opened. 4 dni investigation. Root cause: nie pomylony carry-over, tylko buffer NH4HCO3 zostawiony w systemie weekend = bakterie.

💡 Lekcja:

NIGDY nie zostawiaj buforu w systemie >3 dni. Zawsze flush z 80% ACN/20% H2O przed weekendem. Koszt lekcji: 4 dni pracy + 3 batch release delay.

Ask about this method

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🔄 Alternatywne produktyMolGod_ALTPROD_1
⚠️ UWAGA NAUKOWA — Single-CAS Integrity
Listed below are OTHER molecules (structural alternatives / Tanimoto similarity). All physicochemical values (MW, pKa, LD50, GHS, spectra) apply to THESE alternatives, NOT the current molecule (CAS 55934-93-5). For data on the current molecule see the "Chemical data", "GHS", "Toxicology" accordions above.
Diethylene glycol monomethyl ether
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Ethylene glycol dimethyl ether
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Diethylene Glycol Monoethyl Ether
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Diethylene glycol dimethyl ether
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Diethylene glycol monobutyl ether
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📄 Certificats d'analyse (CoA) CAS 55934-93-5 aucun MolGod_COA_2

Aucun certificat pour ce produit dans la base de données.

📚 Références scientifiques (Chicago Author-Date) — cliquez pour développer

Normes de gestion des lots et de certification en laboratoire — 13 sources indépendantes (ICH Q1/Q3/Q6/Q7/Q10 + ISO 17025 + WHO TRS + 21 CFR 211 + EMA + USP + Ph.Eur. + PIC/S + IPEC-PQG).

  1. International Council for Harmonisation (ICH). 2000. "Q7 Good Manufacturing Practice Guide for Active Pharmaceutical Ingredients." ICH Expert Working Group. [lien ↗] — GMP for APIs — adopted by EMA, FDA, MHLW
  2. International Organization for Standardization. 2017. "ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories." ISO. [lien ↗] — Lab accreditation standard underpinning every CoA
  3. World Health Organization. 2010. "WHO Good Manufacturing Practices for Pharmaceutical Products: Main Principles (WHO Technical Report Series No. 957, Annex 3)." WHO Press. [lien ↗] — WHO TRS No. 957 — global reference for GMP
  4. International Council for Harmonisation (ICH). 2003. "ICH Q1A(R2): Stability Testing of New Drug Substances and Products." International Council for Harmonisation. [lien ↗] — Source for batch shelf-life and retest dating
  5. International Council for Harmonisation (ICH). 2006. "ICH Q3A(R2): Impurities in New Drug Substances." ICH. [lien ↗]
  6. International Council for Harmonisation (ICH). 1999. "ICH Q6A: Specifications for New Drug Substances and Products." ICH. [lien ↗] — CoA acceptance-criteria specification standard
  7. International Council for Harmonisation (ICH). 2008. "ICH Q10: Pharmaceutical Quality System." ICH. [lien ↗]
  8. U.S. Food and Drug Administration. 2024. "21 CFR Part 211: Current Good Manufacturing Practice for Finished Pharmaceuticals." US Code of Federal Regulations. [lien ↗] — US legal mandate (Subpart J — Records and Reports)
  9. European Medicines Agency. 2014. "Guideline on Process Validation for Finished Products — Information and Data to Be Provided EMA/CHMP/CVMP/QWP/BWP/70278/2012." European Medicines Agency. [lien ↗]
  10. United States Pharmacopeial Convention. 2024. "United States Pharmacopeia and National Formulary, USP 47-NF 42." USP. [lien ↗]
  11. European Pharmacopoeia Commission. 2024. "European Pharmacopoeia 11th Edition." Council of Europe — EDQM. [lien ↗]
  12. Pharmaceutical Inspection Co-operation Scheme (PIC/S). 2021. "Guide to Good Manufacturing Practice for Medicinal Products PE 009-15." PIC/S Secretariat, Geneva. [lien ↗] — Cross-recognized GMP for 54 inspectorates worldwide
  13. International Pharmaceutical Excipients Council (IPEC) and Pharmaceutical Quality Group (PQG). 2017. "Joint IPEC-PQG Good Manufacturing Practices Guide for Pharmaceutical Excipients." IPEC-Americas. [lien ↗] — Excipient-grade CoA standard for non-API ingredients
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📜 Brevets (métadonnées publiques) aucune donnée MolGod_PATENT_2

Aucune métadonnée de brevet publique n'a été trouvée pour cette substance dans Crossref / OpenAlex pour le moment. Les données seront complétées automatiquement après le rafraîchissement du cache (24h).

📚 Références (Chicago Author-Date) — cliquez pour développer
  1. Parveen Kumari, Krishan Kumar. (2025). "Enhanced photocatalytic activity of Ce3+ doped Mg-Co spinel ferrite-CNT nanocomposites for dye degradation". Ceramics International. https://doi.org/10.1016/j.ceramint.2025.09.308
  2. Wei Deng, Rui Xiong, Xinming Zhai et al.. (2024). "Activation technology of steel slag for concrete exposed to plateau climate: a state-of-the-art review". Environmental Science and Pollution Research. https://doi.org/10.1007/s11356-024-34923-1
  3. Julia Sosin, Anna Pilarz, Julia Stachowiak et al.. (2024). "Breakthrough in Pediatric Atopic Dermatitis Therapy: The Role of Monoclonal Antibodies as a New Hope for Targeted Treatment in Children". Quality in Sport. https://doi.org/10.12775/qs.2024.31.55934
  4. Milton Mauad de Carvalho Camera Filho, Tatiana Alvarez Vian, Angela Ester Mallmann Centenaro et al.. (2021). "Formação de administradores: da institucionalização à persistência da crise / Training of administrators: from institutionalization to the persistence of the crisis". Brazilian Journal of Development. https://doi.org/10.34117/bjdv7n6-144
  5. Yi Zhou, Wenzhang Fang, Yuanxin Deng et al.. (2017). "Enhanced photoreduction of Cr( vi ) and photooxidation of NO over TiO 2−x mesoporous single crystals". RSC Advances. https://doi.org/10.1039/c7ra09903g
  6. (2011). "93". Musing. https://doi.org/10.15215/aupress/9781897425909.094
  7. C D Dunn, N L Hastings. (2000). "Biogeochemical survey of the Nechako River area using outer back of Lodgepole pine (NTS 93 F/9, 93 F/10, 93 F/15, 93 F/16 and parts of 93 F/11, 93 F/14, 93 K/1 and 93 K/2), alkali metals, alkaline earths, manganese and aluminum, central British Columbia". https://doi.org/10.4095/211477
  8. C D Dunn, N L Hastings. (2000). "Biogeochemical survey of the Nechako River area using outer back of Lodgepole pine (NTS 93 F/9, 93 F/10, 93 F/15, 93 F/16 and parts of 93 F/11, 93 F/14, 93 K/1 and 93 K/2), base metals, silver, and pathfinder elements, central British Columbia". https://doi.org/10.4095/211475
  9. (1993). "Proceedings of OCEANS '93". Proceedings of OCEANS 93 OCEANS-93. https://doi.org/10.1109/oceans.1993.326041
  10. (0). "55934, 1898-02-07, HIRT (Prof. Johann Christian), sculpteur †". Art Sales Catalogues Online. https://doi.org/10.1163/2210-7886_asc-55934
  11. (0). "V". Micmac dictionary. https://doi.org/10.2307/j.ctv16s0c.43
  12. (0). "Acknowledgments". Rouge Pulp. https://doi.org/10.2307/j.ctt5hjsj0.43
  13. (0). "Back Matter". Blowout. https://doi.org/10.2307/j.ctt5vkfv2.44
  14. (0). "ASTILLAS". Moradas interiores. https://doi.org/10.2307/j.ctv86dhk5.63
  15. (0). "Back Matter". Star Ledger. https://doi.org/10.2307/j.ctt20ks0d5.29
  16. World Intellectual Property Organization. 2024. "Patent Cooperation Treaty (PCT)." https://www.wipo.int/pct/.
  17. U.S. Patent and Trademark Office. 2024. "USPTO Patent Public Search." https://ppubs.uspto.gov/.
  18. European Patent Office. 2024. "Espacenet Patent Search." https://worldwide.espacenet.com/.
  19. Newman, David J., and Gordon M. Cragg. 2020. "Natural Products as Sources of New Drugs over the Nearly Four Decades from 01/1981 to 09/2019." Journal of Natural Products 83 (3): 770-803.
  20. Davies, Mark, Michał Nowotka, George Papadatos, et al. 2015. "ChEMBL Web Services: Streamlining Access to Drug Discovery Data and Utilities." Nucleic Acids Research 43 (W1): W612-W620.
  21. Bickerton, G. Richard, Gaia V. Paolini, Jérémy Besnard, Sorel Muresan, and Andrew L. Hopkins. 2012. "Quantifying the Chemical Beauty of Drugs." Nature Chemistry 4 (2): 90-98.
  22. Meanwell, Nicholas A. 2011. "Synopsis of Some Recent Tactical Application of Bioisosteres in Drug Design." Journal of Medicinal Chemistry 54 (8): 2529-2591.
  23. Ertl, Peter, and Ansgar Schuffenhauer. 2009. "Estimation of Synthetic Accessibility Score of Drug-Like Molecules Based on Molecular Complexity and Fragment Contributions." Journal of Cheminformatics 1: 8.
  24. Hopkins, Andrew L., and Colin R. Groom. 2002. "The Druggable Genome." Nature Reviews Drug Discovery 1 (9): 727-730.
  25. Allison, John R., and Mark A. Lemley. 1998. "Empirical Evidence on the Validity of Litigated Patents." AIPLA Quarterly Journal 26 (3): 185-275.
  26. Patani, George A., and Edmond J. LaVoie. 1996. "Bioisosterism: A Rational Approach in Drug Design." Chemical Reviews 96 (8): 3147-3176.
  27. Lerner, Josh. 1994. "The Importance of Patent Scope: An Empirical Analysis." RAND Journal of Economics 25 (2): 319-333.

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Données de PubChemSource : PubChem (NIH)
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📚 RÉFÉRENCES (Bibliographie agrégée, Chicago Author-Date) 120 éléments

Toutes les sources scientifiques citées dans les accordéons ci-dessus pour le CAS 55934-93-5. Format : Chicago Manual of Style, 17e éd., système Auteur-Date.

🗄️ Bases de données scientifiques

  1. NIST. n.d. NIST Chemistry WebBook: CAS 55934-93-5. Gaithersburg, MD: National Institute of Standards and Technology. https://webbook.nist.gov/cgi/cbook.cgi?ID=55934-93-5.
  2. AIST. n.d. Spectral Database for Organic Compounds (SDBS): CAS 55934-93-5. Tsukuba, Japan: National Institute of Advanced Industrial Science and Technology. https://sdbs.db.aist.go.jp/.
  3. Linstrom, Peter J., and William G. Mallard, eds. n.d. NIST Chemistry WebBook: NIST Standard Reference Database Number 69. Gaithersburg, MD: National Institute of Standards and Technology. https://doi.org/10.18434/T4D303.
  4. PubChem. n.d. PubChem Compound Summary: CAS 55934-93-5. Bethesda, MD: National Center for Biotechnology Information (NCBI), National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/#query=55934-93-5.

📐 Normes / Lignes directrices

  1. ICH. 2003. "Stability Testing of New Drug Substances and Products: Q1A(R2)." Geneva: International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use. https://database.ich.org/sites/default/files/Q1A%28R2%29%20Guideline.pdf.
  2. National Fire Protection Association (NFPA). 2024. "NFPA 30: Flammable and Combustible Liquids Code." NFPA, Quincy, MA. https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=30.
  3. Occupational Safety and Health Administration (OSHA). 2023. "29 CFR 1910.106 — Flammable Liquids." U.S. Department of Labor, Federal Register. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.106.
  4. European Chemicals Agency (ECHA). 2024. "Annex VI to Regulation (EC) No 1272/2008 (CLP) — Harmonised Classification and Labelling." ECHA, Helsinki / Official Journal of the European Union. https://echa.europa.eu/regulations/clp/clp-classification.
  5. European Committee for Standardization (CEN). 2016. "EN 374-1:2016 — Protective gloves against dangerous chemicals and micro-organisms — Part 1: Terminology and performance requirements for chemical risks." CEN, Brussels. https://standards.cencenelec.eu/dyn/www/f?p=205:110:::::FSP_PROJECT,FSP_ORG_ID:38536,6080&cs=1B0DAA8B85DF42E4A2C70E5D71F0BFA32.
  6. European Committee for Standardization (CEN). 2001. "EN 166:2001 — Personal eye-protection — Specifications." CEN, Brussels. https://standards.cencenelec.eu/dyn/www/f?p=CEN:110:0::::FSP_PROJECT:6541&cs=1F1A4E0A78C4DB6A28DBE2E8C29D89DCF.
  7. European Committee for Standardization (CEN). 2009. "EN 14605:2005+A1:2009 — Protective clothing against liquid chemicals — Performance requirements for clothing with liquid-tight (Type 3) or spray-tight (Type 4) connections." CEN, Brussels. https://standards.cencenelec.eu/dyn/www/f?p=CEN:110:0::::FSP_PROJECT:21581&cs=1A04A2D3C7CC58E9E6CB58D55F7EBFB7E.
  8. National Institute for Occupational Safety and Health (NIOSH). 2017. "Recommendations for Chemical Protective Clothing: A Companion to the NIOSH Pocket Guide." U.S. Department of Health & Human Services / CDC. https://www.cdc.gov/niosh/ncpc/default.html.
  9. Occupational Safety and Health Administration (OSHA). 2011. "Personal Protective Equipment — General requirements." U.S. Department of Labor — 29 CFR 1910.132. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.132.

📖 Livres

  1. Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook, 2nd ed.. Boca Raton, FL: CRC Press. https://www.routledge.com/Hansen-Solubility-Parameters-A-Users-Handbook/Hansen/p/book/9780849372483.
  2. Barton, Allan F. M. 1991. CRC Handbook of Solubility Parameters and Other Cohesion Parameters: 2nd ed.. Boca Raton, FL: CRC Press. https://www.routledge.com/CRC-Handbook-of-Solubility-Parameters-and-Other-Cohesion-Parameters/Barton/p/book/9780849301766.
  3. Connors, Kenneth A., Gordon L. Amidon, and Valentino J. Stella. 1986. Chemical Stability of Pharmaceuticals: A Handbook for Pharmacists, 2nd ed.. New York: Wiley. https://doi.org/10.1002/0471734683.
  4. Rumble, John R., ed. 2019. CRC Handbook of Chemistry and Physics: 100th Edition. Boca Raton, FL: CRC Press. https://hbcp.chemnetbase.com/.
  5. Urben, Peter G. 2017. Bretherick's Handbook of Reactive Chemical Hazards, 8th Edition. Academic Press / Elsevier, Oxford. https://www.sciencedirect.com/book/9780081010594.

📄 Articles scientifiques (évalués par les pairs)

  1. Stefanis, Emmanuel, and Costas Panayiotou. 2008. "Prediction of Hansen Solubility Parameters with a New Group-Contribution Method." International Journal of Thermophysics 29: 568-585. https://doi.org/10.1007/s10765-008-0415-z.
  2. Stoll, Vincent S., and John S. Blanchard. 1990. "Buffers: Principles and Practice: In Methods in Enzymology, vol. 182." San Diego: Academic Press. https://doi.org/10.1016/0076-6879(90)82008-P.

🌐 Sites web

  1. ECHA. 2023. "Guidance on the Application of the CLP Criteria." European Chemicals Agency. https://echa.europa.eu/guidance-documents/guidance-on-clp.
  2. European Parliament. 2006. "Regulation (EC) No 1907/2006 (REACH)." Official Journal of the European Union L 396: 1–849.
  3. ECHA. 2023. "Candidate List of Substances of Very High Concern for Authorisation." European Chemicals Agency. https://echa.europa.eu/candidate-list-table.
  4. European Parliament. 2008. "Regulation (EC) No 1272/2008 on Classification, Labelling and Packaging of Substances and Mixtures (CLP)." Official Journal of the European Union L 353: 1–1355.
  5. ECHA. 2017. "Guidance on the Compilation of Safety Data Sheets." Version 3.1. European Chemicals Agency. ECHA-17-G-01-EN. https://echa.europa.eu/documents/10162/23047722/sds_en.pdf.
  6. ECHA. 2022. "Restrictions Under REACH — Annex XVII." European Chemicals Agency. https://echa.europa.eu/substances-restricted-under-reach.
  7. United Nations. 2021. Globally Harmonized System of Classification and Labelling of Chemicals (GHS). 9th revised ed. ST/SG/AC.10/30/Rev.9. New York and Geneva: United Nations. https://unece.org/ghs-rev9-2021.
  8. ECHA. 2020. "Understanding REACH." European Chemicals Agency. https://echa.europa.eu/regulations/reach/understanding-reach.
  9. Snyder, Lloyd R., John W. Dolan, and Joseph J. Kirkland. 2010. Introduction to Modern Liquid Chromatography. Wiley.
  10. Schoenmakers, Peter J.. 1986. Optimization of Chromatographic Selectivity: A Guide to Method Development. Elsevier.
  11. Snyder, L. R., and J. W. Dolan. 2007. High-Performance Gradient Elution: The Practical Application of the Linear-Solvent-Strength Model. Wiley.
  12. Nikitas, Pavlos, and Adrian Pappa-Louisi. 2009. "Retention models for isocratic and gradient elution in reversed-phase liquid chromatography." Journal of Chromatography A 1216: 1737-1755. https://doi.org/10.1016/j.chroma.2008.10.005.
  13. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." Journal of Chromatography A 1216: 1764-1772. https://doi.org/10.1016/j.chroma.2008.11.094.
  14. Dong, Michael W.. 2019. HPLC and UHPLC for Practicing Scientists. Wiley. https://doi.org/10.1002/9781119313793.
  15. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." Journal of Separation Science 30: 1167-1182. https://doi.org/10.1002/jssc.200700026.
  16. Stoll, Dwight R., and Peter W. Carr. 2017. "Two-Dimensional Liquid Chromatography: A State of the Art Tutorial." Analytical Chemistry 89: 519-531. https://doi.org/10.1021/acs.analchem.6b03506.
  17. Dolan, John W.. 2013. "When to Modify Method Conditions." LCGC North America 31: 192-199. https://www.chromatographyonline.com/view/when-modify-method-conditions.
  18. Meyer, Veronika R.. 2010. Practical High-Performance Liquid Chromatography. Wiley.
  19. Van Deemter, J. J., F. J. Zuiderweg, and A. Klinkenberg. 1956. "Longitudinal diffusion and resistance to mass transfer as causes of nonideality in chromatography." https://doi.org/10.1016/0009-2509(56)80003-1.
  20. Giddings, J. Calvin. 1965. "Dynamics of Chromatography, Part I: Principles and Theory." Marcel Dekker.
  21. Poppe, Hans. 1997. "Some reflections on speed and efficiency of modern chromatographic methods." https://doi.org/10.1016/S0021-9673(97)00376-2.
  22. Wu, Naijun, and Anton M. Clausen. 2007. "Fundamental and practical aspects of ultrahigh pressure liquid chromatography for fast separations." https://doi.org/10.1002/jssc.200700026.
  23. Carr, Peter W.. 2009. "The new physical chemistry of HPLC." https://doi.org/10.1016/j.chroma.2008.11.094.
  24. Knox, John H.. 1977. "Practical aspects of LC theory." https://doi.org/10.1093/chromsci/15.9.352.
  25. Snyder, L. R., J. J. Kirkland, and J. L. Glajch. 1997. "Practical HPLC Method Development." Wiley.
  26. Engelhardt, Heinz. 2014. "100 Years of Chromatography." Wiley-VCH.
  27. Sadek, Paul C.. 2002. "The HPLC Solvent Guide." Wiley-Interscience.
  28. Snyder, L. R.. 1978. "Classification of the solvent properties of common liquids." https://doi.org/10.1093/chromsci/16.6.223.
  29. Reichardt, Christian, and Thomas Welton. 2010. "Solvents and Solvent Effects in Organic Chemistry." Wiley-VCH.
  30. Vailaya, Anant, and Csaba Horváth. 1998. "Retention thermodynamics in hydrophobic interaction chromatography." https://doi.org/10.1021/ie980212h.
  31. Krstulović, Andrea M., and Phyllis R. Brown. 1981. "Reversed-phase High-Performance Liquid Chromatography." Wiley.
  32. Boysen, Reinhard I., and Milton T. W. Hearn. 2009. "Multi-modal HPLC of proteins." https://doi.org/10.1093/chromsci/47.8.645.
  33. USP General Chapter <621>. 2024. "Chromatography." United States Pharmacopeial Convention. https://www.usp.org/harmonization-standards/pdg/general-chapters/chromatography.
  34. International Council for Harmonisation (ICH). 2023. "Validation of Analytical Procedures Q2(R2)." ICH Expert Working Group. https://database.ich.org/sites/default/files/ICH_Q2-R2_Document_Step4_Guideline_2023_1101.pdf.
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