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Eapearl Chemical
Diethylene glycol monobutyl ether, CAS 112-34-5 — chemical product label

Diethylene glycol monobutyl ether

Butyl Carbitol

CAS 112-34-5 EC 203-961-6 C8H18O3 Ether SDS published CLP Warning

⚠️ 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 NameDiethylene glycol monobutyl ether
Other NamesButyl Carbitol
CAS No.112-34-5
EINECS No.203-961-6
MFC8H18O3
Molecular weight162.23
Purity99.0%
AppearanceColorless liquid
Density0.967 g/mL at 25 °C (lit.)
Melting point-68 °C (lit.)-68 °C (lit.)
Boiling point231 °C (lit.)
Flashing point212°F

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

Hazard classification

GHS pictogram GHS07 — Irritant / harmful

Warning

Harmonised classification (EU) — ECHA Annex VI (harmonised, ATP 23; 2026-07-07)

  • H319 Causes serious eye irritation
Precautionary statements (3)
  • P264 Wash thoroughly after handling
  • P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking
  • P260 Do not breathe dust/fume/gas/mist/vapours/spray
Full safety data sheet CLP label (EN)

European Chemicals Agency. "2-(2-butoxyethoxy)ethanol; diethylene glycol monobutyl ether, Index No. 603-096-00-8." In Table 3 of Annex VI to Regulation (EC) No 1272/2008 (CLP Regulation), 23rd Adaptation to Technical Progress (harmonised list as of 2026-07-07). Helsinki: European Chemicals Agency, 2026. https://echa.europa.eu/information-on-chemicals/annex-vi-to-clp.

Substance identity verified against the registry entry on 2026-09-02.

Packaging and shipping

Drum180 kg
IBC Drum1127 kg
ISO tank (20ft)24–26 m³
ISO tank (40ft)48–50 m³
Diethylene glycol monobutyl ether
Diethylene glycol monobutyl ether
Diethylene glycol monobutyl ether
Diethylene glycol monobutyl ether
Diethylene glycol monobutyl ether

Diethylene glycol monobutyl ether(Butyl Carbitol) is the premium member of the ethylene glycol ether family. It is an outstanding, high-boiling-point, low-volatile, environmentally friendly solvent. Its molecular structure contains both hydrophilic ether segments and hydrophobic butyl ends, making it an excellent “bridging solvent” that can effectively mix the aqueous phase and the oil phase. It has strong solubility and coupling capabilities for resins, oils, dyes, and cellulose derivatives. With a high boiling point of approximately 230°C and a very slow evaporation rate, it is particularly suitable for high-end applications that require long-lasting effects, high-temperature process stability, or strict anti-whiteing (anti-reversion to white) requirements.

Diethylene glycol monobutyl ether(Butyl Carbitol) Offer applications in multiple industries such as coatings, cleaning, agrochemicals, electronics, and specialty chemicals.Diethylene glycol monobutyl ether(Butyl Carbitol) Offer applications in multiple industries such as coatings, cleaning, agrochemicals, electronics, and specialty chemicals.Diethylene glycol monobutyl ether(Butyl Carbitol) Offer applications in multiple industries such as coatings, cleaning, agrochemicals, electronics, and specialty chemicals.

Diethylene glycol monobutyl ether(Butyl Carbitol) Offer applications in multiple industries such as coatings, cleaning, agrochemicals, electronics, and specialty chemicals.

Product Description

Anhui Eapearl  Chemical Co., Ltd., as a leading professional manufacturer and solution provider of alcohol ether solvents in China, relies on advanced production processes, strict quality control systems and a complete supply chain to currently provide the market with high-performance diethylene glycol monobutyl ether (butyl carbomer). We are committed to transforming this multi-functional “bridging solvent”, which features extremely high boiling point, excellent solubility, extremely low volatility and outstanding safety and environmental protection properties, into a core material for customers in industries such as coatings, inks, cleaning, agrochemicals and electronic chemicals to achieve breakthroughs in product performance and process upgrades. 

Product Core Positioning 

Diethylene glycol monobutyl ether (commonly known as butyl carbomethanol) is the premium member of the ethylene glycol ether family. It is an outstanding, high-boiling-point, low-volatile, environmentally friendly solvent. Its molecular structure contains both hydrophilic ether segments and hydrophobic butyl ends, making it an excellent “bridging solvent” that can effectively mix the aqueous phase and the oil phase. It has strong solubility and coupling capabilities for resins, oils, dyes, and cellulose derivatives. With a high boiling point of approximately 230°C and a very slow evaporation rate, it is particularly suitable for high-end applications that require long-lasting effects, high-temperature process stability, or strict anti-whiteing (anti-rebrowning) requirements.

Core application value and solutions

High-end industrial coatings and inks (the “big white water” core application): As the industry’s recognized “big white water”, its core value lies in extending and stabilizing the coalescence window period of the coating film. When applied in high-humidity environments, it can effectively prevent water from penetrating the coating that is not fully formed, avoiding “re-whitening” or “fogging” caused by a sudden change in refractive index, significantly enhancing the final gloss, transparency, and appearance quality of varnish, high-gloss paint, and water-based wood coatings. At the same time, its high boiling point characteristic is also an ideal slow-drying solvent and leveling agent for industrial coatings such as baking paints and electrophoretic paints.

Heavy dirt industrial cleaning and precision electronic cleaning: With strong hydrophobic dissolution power for oils, carbon deposits, and polymer residues, as well as long-lasting contact time brought by high boiling point, it is a key component for preparing heavy oil stain cleaning agents, paint strippers, engine cleaning agents. High-purity electronic-grade products are more suitable for semiconductor photolithography removal, liquid crystal panels, and optical components’ precision cleaning, and its low residue characteristic ensures high cleanliness after cleaning.

Agricultural chemical formulations: As an efficient solvent, emulsifier, and penetration aid, it can enhance the solubility of pesticide active ingredients, improve the spreading, adhesion, and internal absorption and translocation efficiency of the pesticide solution on the leaf surface, thereby enhancing the efficacy and persistence period of the pesticide.

Special chemicals and processing aids: Widely used as resin plasticizers, hydraulic brake fluid diluents, fiber lubricants, cutting oil components, rubber and adhesive components, and organic synthesis intermediates.

Consumer chemicals: As an excellent coupling agent and solvent in personal care products and household cleaning agents, it is used to stabilize and enhance the solubility of hydrophobic active substances such as fragrances and essential oils.

Anhui Eapearl Chemical Co., Ltd., with a series of high-performance alcohol ether solvents represented by diethylene glycol monobutyl ether (butyl carbitol), has always been committed to providing outstanding products, professional services, and reliable supply to become the most trustworthy partner for customers on their pursuit of process excellence and product innovation. We look forward to working with you to create higher value.

Diethylene glycol monobutyl ether(Butyl Carbitol) Offer applications in multiple industries such as coatings, cleaning, agrochemicals, electronics, and specialty chemicals.

Diethylene glycol monobutyl ether(Butyl Carbitol) Offer applications in multiple industries such as coatings, cleaning, agrochemicals, electronics, and specialty chemicals.

Delivery&Payment method

Diethylene glycol monobutyl ether(Butyl Carbitol) Offer applications in multiple industries such as coatings, cleaning, agrochemicals, electronics, and specialty chemicals.

Frequently asked

In what packaging is Diethylene glycol monobutyl ether shipped?

Standard formats are Drum (180 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 Diethylene glycol monobutyl ether?

Yes. A full safety data sheet for CAS 112-34-5 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 99.0%. Tighter specifications are confirmed against the production batch before shipment.

Technical reading on Diethylene glycol monobutyl ether

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🧬 3D分子可视化器
正在加载分子...
3D模型Diethylene Glycol Monobutyl Ether，CAS 112-34-5，分子式C8H18O3, 摩尔质量 162.23 g/mol

数据转录自法规登记册和专业文献，并注明来源与版本。不能替代供应商的安全数据表。未记录来源的字段已作相应标注。

📊 物理化学数据 — CAS 112-34-5MolGod_PROPHUB_MAIN
📊 物理化学性质

快速参考

化学式： C8H18O3
分子量： 162.23 g/mol
CAS号： 112-34-5
🔬 高级属性

化学标识符

SMILES: CCCCOCCOCCO

最后更新： 未确认

化学概述: Diethylene Glycol Monobutyl EtherMolGod_OVERVIEW_1
分子式C8H18O3[1]
分子量162.23 g/mol[1]
LogP（亲脂性）0.6[1]
IUPAC名称2-(2-butoxyethoxy)ethanol[1]
SMILESCCCCOCCOCCO[1]
InChIKeyOAYXUHPQHDHDDZ-UHFFFAOYSA-N[1]

同义词: 2-(2-Butoxyethoxy)ethanol · 112-34-5 · DIETHYLENE GLYCOL MONOBUTYL ETHER · Diethylene glycol butyl ether · Butyl carbitol

数据来源： PubChem (NLM/NIH)
最后更新： 2026-09-02

📚 科学参考文献（芝加哥作者-日期格式） (1 来源)
  1. PubChem. National Center for Biotechnology Information (NIH/NLM), chemical compound database. ↗ applies to: 分子式 · 分子量 · LogP（亲脂性） · IUPAC名称 · SMILES · InChIKey

科学研究

[1]PubMed2023
[An occupational acute poisoning incident of diethylene glycol monobutyl ether].
Ding MZ, Men JL. (2023). "[An occupational acute poisoning incident of diethylene glycol monobutyl ether].". Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi
查看完整研究 ↗
[2]PubMed2022
Neutral Per- and Polyfluoroalkyl Substances, Butyl Carbitol, and Organic Corrosion Inhibitors in Aqueous Film-Forming Foams: Implications for Vapor…
Titaley IA, Khattak J, Dong J et al.. (2022). "Neutral Per- and Polyfluoroalkyl Substances, Butyl Carbitol, and Organic Corrosion Inhibitors in Aqueous Film-Forming Foams: Implications for Vapor Intru
查看完整研究 ↗
[3]PubMed2020
Double gloving of disposable nitrile gloves exposed to diethylene glycol mono-n-butyl ether.
Takaku-Pugh S, Que Hee S. (2020). "Double gloving of disposable nitrile gloves exposed to diethylene glycol mono-n-butyl ether.". Journal of occupational and environmental hygiene. https://doi.org/10.
查看完整研究 ↗
[4]PubMed2016
Bioaugmentation for treatment of full-scale diethylene glycol monobutyl ether (DGBE) wastewater by Serratia sp. BDG-2.
Chen M, Fan R, Zou W et al.. (2016). "Bioaugmentation for treatment of full-scale diethylene glycol monobutyl ether (DGBE) wastewater by Serratia sp. BDG-2.". Journal of hazardous materials. https://d
查看完整研究 ↗
[5]PubMed2012
Fertility and developmental toxicity studies of diethylene glycol monobutyl ether (DGBE) in rats.
Sitarek K, Gromadzińska J, Lutz P et al.. (2012). "Fertility and developmental toxicity studies of diethylene glycol monobutyl ether (DGBE) in rats.". International journal of occupational medicine an
查看完整研究 ↗
[6]PubMed2005
Biomonitoring of 2-(2-alkoxyethoxy)ethanols by analysing urinary 2-(2-alkoxyethoxy)acetic acids.
Laitinen J, Pulkkinen J. (2005). "Biomonitoring of 2-(2-alkoxyethoxy)ethanols by analysing urinary 2-(2-alkoxyethoxy)acetic acids.". Toxicology letters. https://doi.org/10.1016/j.toxlet.2003.09.022
查看完整研究 ↗
[7]PubMed2005
Diethylene glycol monobutyl ether (DGBE): two- and thirteen-week oral toxicity studies in Fischer 344 rats.
Johnson KA, Baker PC, Kan HL et al.. (2005). "Diethylene glycol monobutyl ether (DGBE): two- and thirteen-week oral toxicity studies in Fischer 344 rats.". Food and chemical toxicology : an internatio
查看完整研究 ↗
[8]PubMed2005
Effects of diethylene glycol butyl ether and butoxyethoxyacetic acid on rat and human erythrocytes.
Udden MM. (2005). "Effects of diethylene glycol butyl ether and butoxyethoxyacetic acid on rat and human erythrocytes.". Toxicology letters. https://doi.org/10.1016/j.toxlet.2003.09.021
查看完整研究 ↗
📚 科学参考文献（芝加哥作者-日期格式） 11 refs · 1 baz

MOLECULE 按CAS号参考文献（实时来自13+数据库）

来源： db:pubmed (12)

  1. db:pubmed Ding MZ, Men JL. (2023). "[An occupational acute poisoning incident of diethylene glycol monobutyl ether].". Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases. https://doi.org/10.3760/cma.j.cn121094-20220803-00387 →
  2. db:pubmed Titaley IA, Khattak J, Dong J et al.. (2022). "Neutral Per- and Polyfluoroalkyl Substances, Butyl Carbitol, and Organic Corrosion Inhibitors in Aqueous Film-Forming Foams: Implications for Vapor Intrusion and the Environment.". Environmental science & technology. https://doi.org/10.1021/acs.est.2c02349 →
  3. db:pubmed Takaku-Pugh S, Que Hee S. (2020). "Double gloving of disposable nitrile gloves exposed to diethylene glycol mono-n-butyl ether.". Journal of occupational and environmental hygiene. https://doi.org/10.1080/15459624.2020.1759808 →
  4. db:pubmed Sitarek K, Gromadzińska J, Lutz P et al.. (2012). "Fertility and developmental toxicity studies of diethylene glycol monobutyl ether (DGBE) in rats.". International journal of occupational medicine and environmental health. https://doi.org/10.2478/S13382-012-0058-y →
  5. db:pubmed Laitinen J, Pulkkinen J. (2005). "Biomonitoring of 2-(2-alkoxyethoxy)ethanols by analysing urinary 2-(2-alkoxyethoxy)acetic acids.". Toxicology letters. https://doi.org/10.1016/j.toxlet.2003.09.022 →
  6. db:pubmed Johnson KA, Baker PC, Kan HL et al.. (2005). "Diethylene glycol monobutyl ether (DGBE): two- and thirteen-week oral toxicity studies in Fischer 344 rats.". Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association. https://doi.org/10.1016/j.fct.2004.12.003 →
  7. db:pubmed Udden MM. (2005). "Effects of diethylene glycol butyl ether and butoxyethoxyacetic acid on rat and human erythrocytes.". Toxicology letters. https://doi.org/10.1016/j.toxlet.2003.09.021 →
  8. db:pubmed Gijsbers JH, Tielemans E, Brouwer DH et al.. (2004). "Dermal exposure during filling, loading and brushing with products containing 2-(2-butoxyethoxy)ethanol.". The Annals of occupational hygiene. https://doi.org/10.1093/annhyg/meh008 →
  9. db:pubmed Berlin K, Johanson G, Lindberg M. (1995). "Hypersensitivity to 2-(2-butoxyethoxy)ethanol.". Contact dermatitis. https://doi.org/10.1111/j.1600-0536.1995.tb00849.x →
  10. db:pubmed Ema M, Itami T, Kawasaki H. (1988). "Teratology study of diethylene glycol mono-n-butyl ether in rats.". Drug and chemical toxicology. https://doi.org/10.3109/01480548808998216 →
  11. db:pubmed Thompson ED, Coppinger WJ, Valencia R et al.. (1984). "Mutagenicity testing of diethylene glycol monobutyl ether.". Environmental health perspectives. https://doi.org/10.1289/ehp.8457105 →
物质监管状态
该物质受监管要求约束： 危险废物管理（BDO登记册）. 详细信息请参见“法规状态（REACH/ECHA/CLP）”章节及安全数据表。 监管信息——不限制在本店购买。
🧮 化学计量计算器MolGod_STOICH_1
🧪 化学数据MolGod_CHEMDATA_1
CAS号
112-34-5
分子式
C8H18O3
摩尔质量
162.23 g/mol
IUPAC名称 (EN)
2-(2-butoxyethoxy)ethanol
SMILES
CCCCOCCOCCO
InChIKey
OAYXUHPQHDHDDZ-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.

⚗️ Physicochemical propertiesMolGod_PHYSTAB_2
Temp. wrzenia
231.1
Density
0.954

Source: PubChem, NIST WebBook. Last updated: date not confirmed

🔍 外部标识符MolGod_EXTID_1
12 / 16个ID系统75%
数据库标识符操作
CAS Registry Number112-34-5打开 →
PubChem CID8177[1]打开 →
InChIKeyOAYXUHPQHDHDDZ-UHFFFAOYSA-N[1]打开 →
InChIInChI=1S/C8H18O3/c1-2-3-5-10-7-8-11-6-4-9/h9H,2-…[1]
SMILESCCCCOCCOCCO[1]
EC Number203-961-6[2]打开 →
ChEMBLCHEMBL1904721[3]打开 →
HMDBHMDB0244918打开 →
ChemSpider13839549[4]打开 →
UNII (FDA)9TB90IYC0E打开 →
NSC Number (NCI)407762打开 →
WikiData QIDQ1018210打开 →

来源：PubChem (NIH)、Wikidata SPARQL、KEGG、ChEMBL (EBI)、CompTox CTX (EPA)。

📚 科学参考文献（芝加哥作者-日期格式） (4 来源)
  1. PubChem. National Center for Biotechnology Information (NIH/NLM), chemical compound database. ↗ applies to: PubChem CID · InChIKey · InChI · SMILES
  2. ECHA. EC Inventory — EINECS, ELINCS, NLP and List Numbers assigned under REACH. Helsinki: European Chemicals Agency. ↗ applies to: EC Number
  3. ChEMBL. European Bioinformatics Institute (EMBL-EBI), bioactivity database. ↗ applies to: ChEMBL
  4. ChemSpider. Royal Society of Chemistry, chemical structure database. ↗ applies to: ChemSpider

Further reading

Publications thematically related to this CAS. They are not the source of any value shown on this card.

扩展参考文献 (1)

  1. ★★☆☆☆ CROSSREF 🔓 开放 ❓ 未验证 Anonymous. 2007. "Diethylene glycol monobutyl ether." Encyclopedic Dictionary of Polymers: 289-289. https://doi.org/10.1007/978-0-387-30160-0_3571. 链接 [访问日期: 2026-09-02]
📡 光谱学 — CAS 112-34-5MolGod_SPECHUB_MAIN
📊 光谱（NMR、IR、MS、UV-Vis） (1)

可用光谱类型： IR

红外光谱 (KBr, 4000-400 cm⁻¹)

440个数据点 · 来源： NIST WebBook · NIST ↗ · 📥 JCAMP-DX
🎓 谱图解析指南（供学生使用）
如何解读IR光谱
  • 3200-3600 cm⁻¹ — O-H 伸缩 (宽峰 = 氢键)
  • 2850-3000 cm⁻¹ — C-H 伸缩 (sp³)
  • 1650-1750 cm⁻¹ — C=O 伸缩 (酮、醛、酯)
  • 1400-1600 cm⁻¹ — 芳香环振动
  • 1000-1300 cm⁻¹ — C-O 伸缩 (醚、醇)
  • 无吸收=无官能团→与参考谱图比较

来源： LibreTexts ↗, Silverstein (Spectrometric ID) ↗

📚 科学参考文献（芝加哥作者-日期格式） (7 来源)
  1. National Institute of Standards and Technology. 2024. "NIST Chemistry WebBook, SRD 69." Gaithersburg, MD: NIST. Accessed 2025-01-01. ↗
  2. Spectral Database for Organic Structure Determination (SDBS). 2024. National Institute of Advanced Industrial Science and Technology (AIST), Japan. Accessed 2025-01-01. ↗
  3. Ulrich, Eldon L., Hideo Akutsu, John F. Doreleijers, Yoko Harano, Yannis E. Ioannidis, Jundong Lin, Miron Livny, et al. 2008. "BioMagResBank." Nucleic Acids Research 36 (D1): D402–D408. [DOI ↗]
  4. Horai, Hisayuki, Masanori Arita, Shigehiko Kanaya, Yoshito Nihei, Tasuku Ikeda, Kazuhiro Suwa, Yuya Ojima, et al. 2010. "MassBank: A Public Repository for Sharing Mass Spectral Data for Life Sciences." Journal of Mass Spectrometry 45 (7): 703–714. [DOI ↗]
  5. Linstrom, P.J., and W.G. Mallard, eds. 2024. NIST Chemistry WebBook, NIST Standard Reference Database Number 69. Gaithersburg, MD: National Institute of Standards and Technology. ↗
  6. McDonald, M. Shane, Mike McAvoy, and Ajit Bhalerao. 1988. "JCAMP-DX: A Standard Form for Exchange of Infrared Spectra in Computer Readable Form." Applied Spectroscopy 42 (1): 151–162. [DOI ↗]
  7. PubChem. 2024. "PubChem Compound Database." National Library of Medicine, National Institutes of Health. Accessed 2025-01-01. ↗
结构性质MolGod_STRUCT3D_1

正在加载结构数据...

❓ 常见问题 (10)MolGod_FAQ_1
What is Diethylene Glycol Monobutyl Ether?
Diethylene Glycol Monobutyl Ether (CAS 112-34-5) is a chemical compound with the molecular formula C8H18O3 and a molecular weight of 162.23 g/mol. The chemical data comes from PubChem (National Institutes of Health, USA).
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What is the CAS number of Diethylene Glycol Monobutyl Ether?
The CAS number for Diethylene Glycol Monobutyl Ether is 112-34-5. A CAS Registry Number is the standard identifier for a chemical substance in scientific literature and in trade.
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What is the chemical formula of Diethylene Glycol Monobutyl Ether?
The molecular formula of Diethylene Glycol Monobutyl Ether is C8H18O3. Its molecular weight is 162.23 g/mol.
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What is the boiling point of Diethylene Glycol Monobutyl Ether?
The boiling point of Diethylene Glycol Monobutyl Ether is 231.1.
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What is the density of Diethylene Glycol Monobutyl Ether?
The density of Diethylene Glycol Monobutyl Ether is 0.954.
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What is 112-34-5?
112-34-5 (CAS 112-34-5) is a chemical compound. The chemical data comes from PubChem (National Institutes of Health, USA).
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What is the CAS number of 112-34-5?
The CAS number for 112-34-5 is 112-34-5. A CAS Registry Number is the standard identifier for a chemical substance in scientific literature and in trade.
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Is Diethylene Glycol Monobutyl Ether hazardous?
Diethylene Glycol Monobutyl Ether carries the GHS classification: Array, Array, Array, Warning, https://pubchem.ncbi.nlm.nih.gov/compound/8177#section=Safety-and-Hazards. Read the safety data sheet before use and follow the handling precautions it states.
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How should Diethylene Glycol Monobutyl Ether be stored?
Diethylene Glycol Monobutyl Ether 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.
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How should 112-34-5 be stored?
112-34-5 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.
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➕ 建议问题
下载结构文件MolGod_STRDL_1

来自PubChem数据库（NIH）的分子结构文件。兼容Avogadro、PyMOL、Jmol和ChemDraw等程序。

来源：PubChem，美国国家医学图书馆（NIH）。 CID: 8177

🔄 浓度单位转换器 实时 MolGod_UNITCONV_1

输入Diethylene Glycol Monobutyl Ether浓度（任意单位），其余将自动计算。

分子量： 162.23 g/mol · IUPAC Gold Book ↗

⚗️ 转换公式及引用（每个公式）
转换分子式准确度来源
% (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)
📚 参考文献（8个权威来源）
  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
相似分子结构MolGod_SIMSTR_1

正在加载相似结构...

🧪 溶液制备向导 WIZARD MolGod_PREP_1
① 选择浓度
② 目标体积
③ 溶剂

计算依据： IUPAC Gold Book ↗, Merck ↗

计算化学MolGod_COMPCHEM_1

正在加载计算数据...

🛡️ 安全 — CAS 112-34-5MolGod_SAFEHUB_MAIN
数据限制说明。 本页安全信息仅供参考，不能替代完整的安全数据表（SDS）。使用产品前，请查阅制造商当前的安全数据表以及GHS/CLP指南。CLP分类适用于纯散装物质，不适用于商业制剂。

GHS/CLP分类——(EC) No 1272/2008法规 + UN GHS Rev. 9 (2021)。

⚠ 警告 (Warning)
GHS07 — 刺激性/有害
GHS07 刺激性/有害

🚨 危险说明（H）

  • H319 — 造成严重眼刺激

🛡 防范说明（P）

  • P264 — 作业后彻底清洗手部[和……]。
  • P210 — 远离热源、热表面、火花、明火和其他点火源。禁止吸烟。
  • P260 — 不要吸入粉尘/烟/气体/气雾/蒸气/喷雾。

✓ 根据CLP法规(EC) 1272/2008附件VI的统一分类（官方、具有约束力的分类）。 索引号：603-096-00-8。

参考文献（芝加哥格式）： European Chemicals Agency. "2-(2-butoxyethoxy)ethanol; diethylene glycol monobutyl ether, Index No. 603-096-00-8." In Table 3 of Annex VI to Regulation (EC) No 1272/2008 (CLP Regulation), 23rd Adaptation to Technical Progress (harmonised list as of 2026-07-07). Helsinki: European Chemicals Agency, 2026. https://echa.europa.eu/information-on-chemicals/annex-vi-to-clp.

翻译：CLP 法规 (EC) 1272/2008，附件 III 和 IV。数据：PubChem/NLM。

📚 综合科学参考文献 — Chicago Author-Date 10 来源

从所有Safety Hub选项卡收集的参考文献。CAS号： 112-34-5 · 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，法规
  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

具有自身参考文献的选项卡（紧急情况、个人防护装备、储存、废物）在其各自章节中包含额外的书目条目。

📈 分析统计（t检验·RSD·Grubbs·Q-Dixon） ICH Q2

粘贴一系列重复测量结果（CSV或每行一个数字）。计算器将计算平均值、标准差和95%置信区间，并检测异常值（Grubbs + Dixon Q）。

分隔符：逗号、空格、制表符、换行。至少3个测量值。
📐 统计公式
  • x̄ = Σxᵢ / n — 算术平均值
  • s² = Σ(xᵢ - x̄)² / (n-1) — 样本方差
  • s = √s² — 标准差
  • RSD% = (s / x̄) × 100% — 相对标准差
  • CI₉₅ = x̄ ± t(0.05, n-1) × s / √n — Student's t
  • G = |xᵢ - x̄| / s — Grubbs检验
  • Q = |xsuspect - xnearest| / |xmax - xmin| — Dixon Q-test

来源：ICH Q2(R2) 分析方法验证 · ICH PDF ↗

🧪 缓冲液配方计算器 唯一
参考文献： pKa值来自 Goldberg NIST 81 · CRC Handbook 100th ed. · Stoll & Blanchard 1990 (DOI)

从 20 种常用缓冲体系列表中选择 → 输入目标 pH → 获得精确配方，包括称量质量。

步骤 1：选择缓冲体系

📜 配方历史记录（最近 10 条）
药物状态

Prekliniczny

I期
II期
III期
已批准

临床前——无人体研究数据。

ChEMBL CHEMBL1904721 ↗

扩展参考文献 (1)

  1. ★★☆☆☆ CROSSREF 🔓 开放 ❓ 未验证 Anonymous. 2007. "Diethylene glycol monobutyl ether." Encyclopedic Dictionary of Polymers: 289-289. https://doi.org/10.1007/978-0-387-30160-0_3571. 链接 [访问日期: 2026-09-02]
📅 项目规划器——实验室实验管理器 新品

规划您的整个实验室项目：添加实验（含试剂、重复次数和持续时间）。您将获得甘特图、购物清单（含商店链接！）、预算（含10%余量）和GHS风险矩阵。

🧪 溶解性和溶剂兼容性 MolGod_SOLUB_1
分子
Diethylene Glycol Monobutyl Ether
分子式
C8H18O3
logP (XLogP3)
0.60
摩尔质量（g/mol）
162.23
极性
中等

⚠️ GC估算（Hoftyzer-Van Krevelen）。该CAS无文献HSP数据——精度±2 MPa½。请实验验证。

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.
📚 溶剂科学参考文献（芝加哥作者-日期格式）——点击展开

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
溶解性理论（应用于相容性预测）：
  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 — HSP三元组（dD, dP, dH）+ Ra公式。
  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 — 250+溶剂的完整表格数据集（ε、μ、供体数、受体数）。
  8. PubChem Compound Database — CAS 112-34-5 lookup ↗ — logP (XLogP3), water solubility experimental + predicted.

完整参考文献位于页面底部的参考文献折叠面板——芝加哥格式手册第17版作者-日期格式。

⚗️ 检查反应兼容性 MolGod_RXNCOMP_1
1 0 0
健康： 1/4
易燃性： 0/4
反应性： 0/4
根据NFPA 704 / 由H代码计算

检查Diethylene Glycol Monobutyl Ether是否与另一种试剂兼容

📦 储存兼容性矩阵
酸类 碱 氧化剂 易燃 毒性 Gazy
酸类 ✓ ✗ ✗ ✗ ⚠ ✗
碱 ✗ ✓ ⚠ ⚠ ⚠ ⚠
氧化剂 ✗ ⚠ ✓ ✗ ⚠ ✗
易燃 ✗ ⚠ ✗ ✓ ⚠ ✗
毒性 ⚠ ⚠ ⚠ ⚠ ✓ ⚠
Gazy ✗ ⚠ ✗ ✗ ⚠ ✓
✓ 可一起储存 · ⚠ 谨慎 · ✗ 禁止一起储存 · OSHA Chemical Segregation ↗

兼容性数据来源： Bretherick's Handbook (7th ed.) ↗, GESTIS ↗, ECHA REACH ↗, NFPA 704 ↗

🧮 实验室计算器（8个） MolGod_LABCALC_1
稀释（C₁V₁=C₂V₂）
摩尔浓度（M=n/V）
pH缓冲液（Henderson-Hasselbalch）
Beer-Lambert（A=εcl）
质量→摩尔
浓度%→M
ppm→mg/L
温度 C↔F↔K

已验证的配方： IUPAC Gold Book ↗, DOI ↗

📊 光谱数据库 MolGod_SPECDB_3
📋 实验室方案生成器 MolGod_PROTOCOL_1

方案基于以下内容生成： GHS SDS, Aldrich Lab Guide ↗

🏷️ 标签生成器（QR码） MolGod_LABEL_1
Diethylene Glycol Monobutyl Ether• 2-(2-Butoxyethoxy)ethanol / Butyl carbitol• IUPAC: 2-(2-butoxyethoxy)ethanol• CAS: 112-34-5• EC: 203-961-6• 分子式: C8H18O3• 摩尔质量: 162.23 g/mol警告GHS危险说明：H319: 造成严重眼刺激P210: 远离热源、热表面、火花、明火和其他点火源。禁止吸烟。P260: 不要吸入粉尘/烟/气体/气雾/蒸气/喷雾。P264: 作业后彻底清洗手部[和……]。Anhui Eapearl Chemical Co., Ltd.12th Floor, Tongguan Number Valley, Tongling, Anhui, China+86 186 5620 1888[email protected]epchems.com
Deskryptory Lipinskiego (struktura)
正在加载ADMET预测…
🧪 溶液配制助手（Smart Prep） MolGod_PREP_2

输入您要制备的内容——我将生成SOP

示例如下——点击插入：
预设配方：
📚 科学文献概览 — CAS 112-34-5MolGod_LITHUB_MAIN
⭐ 关键发现（科学文献） 5 出版物
🏆 CAS 112-34-5 — multi-criteria ranking (W12): 30%引用·20%近期性·20%主题·15%历史·15%开放获取.
  1. #1
    Wieslander G; Norbäck D; Lindgren T (2001) · Occupational and environmental medicine
    重要性： 必引文献（经典） · 153 citations
    SCORE 6.56 机制 MUST-CITE Citations: 153 DOI ↗
  2. #2
    Ding MZ, Men JL (2023) · Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases
    重要性： 近期（2023）
    SCORE 3.9 机制 DOI ↗ PubMed ↗
  3. #3
    Titaley IA, Khattak J, Dong J et al. (2022) · Environmental science & technology
    重要性： 通过多标准评分选择（引用+近期性+主题+历史+开放获取）。
    SCORE 3.6 机制 DOI ↗ PubMed ↗
  4. #4
    Thompson ED, Coppinger WJ, Valencia R et al. (1984) · Environmental health perspectives
    重要性： Open access
    SCORE 2.25 机制 Open Access DOI ↗ PubMed ↗
  5. #5
    Johnson KA, Baker PC, Kan HL et al. (2005) · Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association
    重要性： 通过多标准评分选择（引用+近期性+主题+历史+开放获取）。
    SCORE 0 药理学 DOI ↗ PubMed ↗
🔬 HPLC — 方法与参数 — CAS 112-34-5MolGod_HPLCHUB_MAIN
📈 HPLC梯度——优化器（LSS） 模板

基于PubChem XLogP3 + LSS（Snyder等人，2010，第9章）的梯度。

  • 色谱柱: C18
  • 缓冲液: phosphate
  • 流速: 1 mL/min
  • logP: 0.6 (PubChem XLogP3)
  • 斜率: 10% → 95% B, 10 min
  • 总分析时间: 23 min
t (min) %A %B flow (mL/min) 备注
0 90 10 1 开始（平衡）
2 90 10 1 初始保持结束
12 5 95 1 LSS 梯度结束
17 5 95 1 色谱柱清洗
18 90 10 1 返回初始条件
23 90 10 1 再平衡
📚 科学参考文献（芝加哥作者-日期格式）
  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/112-34-5

📐 色谱柱尺寸 — van Deemter 计算器 N=12,466

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

尺寸150 × 4.6 mm, 5 µm
理论塔板数 (N)12,466
u_opt 时的 N12,500
HETP（理论塔板高度，当前）12.032 µm
最小 HETP12 µm
线速度 (u)0.1003 cm/s
u_opt (van Deemter)0.12 cm/s
背压 (ΔP)42.1 bar
分析时间（死体积）2.49 min
📚 科学参考文献（芝加哥作者-日期格式）
  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/112-34-5

🧪 流动相——相容性矩阵 互溶
组分 名称 UV截止波长（nm） P' 检测器
溶剂 Acetonitrile (MeCN) 190 5.8 UV, MS, ELSD, RID, FLD
溶剂 Water 190 10.2 UV, MS, ELSD, RID, FLD
缓冲液 Phosphate (KH2PO4 / K2HPO4) 195 pH 2.0-3.0 / 6.5-8.0 / 11.0-12.5 MS ✗

检测器: UV — 与两种溶剂均兼容.

📚 科学参考文献（芝加哥作者-日期格式）
  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=...

完整HPLC方法指南 同行评审

分子特定场景、故障排除和文献参考

Molecular Predictor

Predicted parameters for this molecule (CAS 112-34-5) are based on literature-backed models (Snyder-Dolan LSS, Neue pore-size rules).

Retention Time
2.7 min
Range: 1.89 – 3.51
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
= 3.082 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
20 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.

化学家的真实问题

First gradient — what to do step by step

You click Method Editor and see 10 empty time/%B rows. Where to start? How many points to enter?

我们的解决方案

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

交互式计算器

Deep Education

理解流动相化学

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: —

常见问题

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

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

Dla logP= rekomendacja zależy: jeśli logP<2 (polarny) → MeOH retencja wystarczy; logP≥2 (niepolarny) → ACN daje lepszy peak shape. Dla tej molekuły (MW=162.23, CAS 112-34-5) 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

Gradient Problem From The Lab

Optymalizacja nachylenia gradientu (dG)

Your impurities co-elute in a narrow 5-8 min window. The 30 min runtime is too long. How to use Snyder-Dolan LSS for optimisation?

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.

常见问题

Heurystyka Snyder: Rt ≈ 2.5·logP + 1.2 min. Dla 2-(2-butoxyethoxy)ethanol (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

Your First HPLC Analysis Ever

Jesteś na 2. roku chemii. Professor powiedział: "Przeanalizuj tę próbkę kwasu benzoesowego". Nigdy nie używałaś HPLC. W labie stoi Agilent 1260, ale nikt nie wie jak go włączyć.

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

常见问题

Rule of thumb: analyty MW10000 (białka) → pore 1000 Å. Dla MW=162.23 (CAS 112-34-5) użyj standardowej kolumny C18 100 Å.

Source: Phenomenex Guide

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

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

Detection Gotcha

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?

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

Stability program — 18 timepoints × 6 batches

New API. 3 conditions (25°C/60%, 30°C/65%, 40°C/75%) × 6 timepoints × 6 batches = 324 injections/quarter.

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) Literatura: Gibson CR, Brown CM (2003) Zorbax SB-C18 150×4.6 mm
Particle size 3.5 μm 5 μm (USP default) 3–5 μm 5 μm
Faza A 10 mM NH₄HCO₃ pH 7.0 Phosphate buffer pH 2.5 Varies per paper 0.1% TFA w H₂O
Faza B Acetonitryl HPLC grade Acetonitryl / Methanol ACN lub MeOH Acetonitryl / 0.1% TFA
Gradient 5 → 95% B w 15 min (linear) Isocratic (preferowane w USP) Custom per publikacja 10 → 90% B w 20 min
Flow 1.0 mL/min 1.5 mL/min 0.8–1.2 mL/min 1.0 mL/min
Temperatura 30°C 25°C 25–40°C 40°C
Detekcja UV 210 nm + 254 nm UV 254 nm (standard USP) UV/MS (per paper) DAD 210/254 nm
Runtime 23 min 30 min 15–45 min 25 min
Rs (typ.) 2.3 ≥ 2.0 varies 2.1
Walidacja USP <621> + ICH Q2(R1) USP <621> obligatoryjnie Research-grade Application note only
Solvent cost/run ~5 PLN/run ~7 PLN/run varies ~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

常见问题

Dla API (active pharmaceutical ingredient) typowo 98-102% label claim. Dla 2-(2-butoxyethoxy)ethanol (CAS 112-34-5) 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

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

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

Source: USP Online

Prep Mistakes That Ruined The Run

Why am I not seeing any peaks?

You injected the sample, you wait 23 min and... a flat line. Anxiety is rising.
Lesson learned (Student MSc, UW, 2024-10):
Wavelength 254 nm does not work for most carboxylic acids — use 210 nm.

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

事后分析 — 真实失败案例 经验教训

真实化学家的失误 — 发生了什么、什么有帮助、要避免什么。

FDA finding — audit trail disabled

Director of QC, pharma 2025-11-04 Poziom 5/5
发生了什么：

FDA inspection Q3 2025. Warning Letter: "Empower audit trail disabled w 3 sekwencjach 2024-12". Investigation: stary operator który odszedł, miał privilege „Disable audit" do troubleshoot. NIKT nie wyłączył mu privileged after departure.

💡 Lekcja:

Privileged access review MONTHLY. Disable audit trail should never be enabled on prod. HR offboarding MUST trigger IT access revocation. Cost: 483 forms + 6 months of remediation.

10 columns in 2 months — wrong filter

Marta K., QC supervisor, pharma company 2025-02-10 Poziom 4/5
发生了什么：

Q1 audit: column cost +340% vs Q4. QA blamed the lab. Investigation: a new operator was using a 0.45 μm filter instead of 0.22 μm. Microparticles got through the guard and were killing the main columns by the 100th injection.

💡 Lekcja:

The filter SOP must be WRITTEN and checked every batch. 0.22 μm is the standard per USP . Cost of the error: 10 columns × 1800 PLN = 18,000 PLN + audit finding.

参考文献与引用

[1]
Gibson CR, Brown CM. (2003). Identification of diethylene glycol monobutyl ether as a source of contamination in an ion trap mass spectrometer.. Journal of the American Society for Mass Spectrometry, 14, 1247-9. https://doi.org/10.1016/S1044-0305(03)00534-8.
DOI PubMed

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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 112-34-5). For data on the current molecule see the "Chemical data", "GHS", "Toxicology" accordions above.
Diethylene glycol monomethyl ether
Ta sama kategoria · Ta sama kategoria produktu
Ethylene glycol dimethyl ether
Ta sama kategoria · Ta sama kategoria produktu
Diethylene glycol monohexyl ether
Ta sama kategoria · Ta sama kategoria produktu
Diethylene glycol dimethyl ether
Ta sama kategoria · Ta sama kategoria produktu
Propylene glycol monomethyl ether (PM)
Ta sama kategoria · Ta sama kategoria produktu
📄 分析证书（CoA） CAS 112-34-5 无 MolGod_COA_2

数据库中无此产品的证书。

📚 科学参考文献（芝加哥作者-日期格式）——点击展开

批次管理与实验室认证标准——13个独立来源（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. [链接 ↗] — 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. [链接 ↗] — 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. [链接 ↗] — 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. [链接 ↗] — Source for batch shelf-life and retest dating
  5. International Council for Harmonisation (ICH). 2006. "ICH Q3A(R2): Impurities in New Drug Substances." ICH. [链接 ↗]
  6. International Council for Harmonisation (ICH). 1999. "ICH Q6A: Specifications for New Drug Substances and Products." ICH. [链接 ↗] — CoA acceptance-criteria specification standard
  7. International Council for Harmonisation (ICH). 2008. "ICH Q10: Pharmaceutical Quality System." ICH. [链接 ↗]
  8. U.S. Food and Drug Administration. 2024. "21 CFR Part 211: Current Good Manufacturing Practice for Finished Pharmaceuticals." US Code of Federal Regulations. [链接 ↗] — 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. [链接 ↗]
  10. United States Pharmacopeial Convention. 2024. "United States Pharmacopeia and National Formulary, USP 47-NF 42." USP. [链接 ↗]
  11. European Pharmacopoeia Commission. 2024. "European Pharmacopoeia 11th Edition." Council of Europe — EDQM. [链接 ↗]
  12. Pharmaceutical Inspection Co-operation Scheme (PIC/S). 2021. "Guide to Good Manufacturing Practice for Medicinal Products PE 009-15." PIC/S Secretariat, Geneva. [链接 ↗] — 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. [链接 ↗] — Excipient-grade CoA standard for non-API ingredients
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📜 专利（公开元数据） 无数据 MolGod_PATENT_2

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📚 参考文献（芝加哥作者-日期格式）——点击展开
  1. Ding MZ, Men JL. (2023). "[An occupational acute poisoning incident of diethylene glycol monobutyl ether].". Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases. https://doi.org/10.3760/cma.j.cn121094-20220803-00387
  2. Titaley IA, Khattak J, Dong J et al.. (2022). "Neutral Per- and Polyfluoroalkyl Substances, Butyl Carbitol, and Organic Corrosion Inhibitors in Aqueous Film-Forming Foams: Implications for Vapor Intrusion and the Environment.". Environmental science & technology. https://doi.org/10.1021/acs.est.2c02349
  3. Takaku-Pugh S, Que Hee S. (2020). "Double gloving of disposable nitrile gloves exposed to diethylene glycol mono-n-butyl ether.". Journal of occupational and environmental hygiene. https://doi.org/10.1080/15459624.2020.1759808
  4. Sitarek K, Gromadzińska J, Lutz P et al.. (2012). "Fertility and developmental toxicity studies of diethylene glycol monobutyl ether (DGBE) in rats.". International journal of occupational medicine and environmental health. https://doi.org/10.2478/S13382-012-0058-y
  5. Laitinen J, Pulkkinen J. (2005). "Biomonitoring of 2-(2-alkoxyethoxy)ethanols by analysing urinary 2-(2-alkoxyethoxy)acetic acids.". Toxicology letters. https://doi.org/10.1016/j.toxlet.2003.09.022
  6. Johnson KA, Baker PC, Kan HL et al.. (2005). "Diethylene glycol monobutyl ether (DGBE): two- and thirteen-week oral toxicity studies in Fischer 344 rats.". Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association. https://doi.org/10.1016/j.fct.2004.12.003
  7. Udden MM. (2005). "Effects of diethylene glycol butyl ether and butoxyethoxyacetic acid on rat and human erythrocytes.". Toxicology letters. https://doi.org/10.1016/j.toxlet.2003.09.021
  8. Gijsbers JH, Tielemans E, Brouwer DH et al.. (2004). "Dermal exposure during filling, loading and brushing with products containing 2-(2-butoxyethoxy)ethanol.". The Annals of occupational hygiene. https://doi.org/10.1093/annhyg/meh008
  9. Berlin K, Johanson G, Lindberg M. (1995). "Hypersensitivity to 2-(2-butoxyethoxy)ethanol.". Contact dermatitis. https://doi.org/10.1111/j.1600-0536.1995.tb00849.x
  10. Ema M, Itami T, Kawasaki H. (1988). "Teratology study of diethylene glycol mono-n-butyl ether in rats.". Drug and chemical toxicology. https://doi.org/10.3109/01480548808998216
  11. Thompson ED, Coppinger WJ, Valencia R et al.. (1984). "Mutagenicity testing of diethylene glycol monobutyl ether.". Environmental health perspectives. https://doi.org/10.1289/ehp.8457105
  12. World Intellectual Property Organization. 2024. "Patent Cooperation Treaty (PCT)." https://www.wipo.int/pct/.
  13. U.S. Patent and Trademark Office. 2024. "USPTO Patent Public Search." https://ppubs.uspto.gov/.
  14. European Patent Office. 2024. "Espacenet Patent Search." https://worldwide.espacenet.com/.
  15. 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.
  16. 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.
  17. 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.
  18. Meanwell, Nicholas A. 2011. "Synopsis of Some Recent Tactical Application of Bioisosteres in Drug Design." Journal of Medicinal Chemistry 54 (8): 2529-2591.
  19. 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.
  20. Hopkins, Andrew L., and Colin R. Groom. 2002. "The Druggable Genome." Nature Reviews Drug Discovery 1 (9): 727-730.
  21. Allison, John R., and Mark A. Lemley. 1998. "Empirical Evidence on the Validity of Litigated Patents." AIPLA Quarterly Journal 26 (3): 185-275.
  22. Patani, George A., and Edmond J. LaVoie. 1996. "Bioisosterism: A Rational Approach in Drug Design." Chemical Reviews 96 (8): 3147-3176.
  23. Lerner, Josh. 1994. "The Importance of Patent Scope: An Empirical Analysis." RAND Journal of Economics 25 (2): 319-333.

REST: /wp-json/molgod/v1/patents/112-34-5?status=active&limit=10

扩展参考文献 (1)

  1. ★★☆☆☆ CROSSREF 🔓 开放 ❓ 未验证 Anonymous. 2007. "Diethylene glycol monobutyl ether." Encyclopedic Dictionary of Polymers: 289-289. https://doi.org/10.1007/978-0-387-30160-0_3571. 链接 [访问日期: 2026-09-02]
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📚 参考文献（综合书目，芝加哥作者-日期格式） 121 条目

以上折叠面板中针对CAS号112-34-5引用的所有科学来源。格式： 《芝加哥格式手册》第17版，作者-日期系统.

🗄️ 科学数据库

  1. NIST. n.d. NIST Chemistry WebBook: CAS 112-34-5. Gaithersburg, MD: National Institute of Standards and Technology. https://webbook.nist.gov/cgi/cbook.cgi?ID=112-34-5.
  2. AIST. n.d. Spectral Database for Organic Compounds (SDBS): CAS 112-34-5. 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 112-34-5. Bethesda, MD: National Center for Biotechnology Information (NCBI), National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/#query=112-34-5.

📐 标准/指南

  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.

📖 书籍

  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.

📄 科学文章（同行评审）

  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.

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