Does BMA mean n-butyl methacrylate or isobutyl methacrylate?

In most commercial usage the bare abbreviation means the normal isomer, n-butyl methacrylate, CAS 97-88-1. The branched isomer, isobutyl methacrylate, is a different substance with its own identifiers and a different contribution to copolymer hardness, and the tertiary isomer is different again. Because all three are abbreviated loosely in day-to-day correspondence, an order written as BMA alone is ambiguous. Write the full chemical name and the CAS number on every enquiry, purchase order and goods-inwards record.

Why must the monomer not be blanketed with pure nitrogen?

Because the stabiliser used in commercial methacrylate monomers requires dissolved oxygen to function. It intercepts radicals by a mechanism that consumes oxygen, so a drum stripped of oxygen contains an inhibitor that is chemically present and functionally absent. The correct headspace is air, or air diluted with nitrogen to a specified oxygen content, never an inert blanket. This is one of the very few cases in a chemical store where displacing oxygen makes a material more dangerous rather than less, and it catches people whose instinct is trained on flammable solvents.

How should inhibitor content be read on a certificate?

As a starting condition rather than a permanent property. The certificate reports the inhibitor level at release; that level falls in storage as the stabiliser does its job, and it falls faster in warm conditions, in light and in the presence of contamination. A long-stored drum can meet its original certificate on every other line while having very little inhibitor left. Where storage has been long or uncertain, retest the inhibitor level before charging a reactor rather than relying on the release figure.

What is popcorn polymerisation and why does it matter here?

It is a self-propagating, expanding polymer growth that forms in dead legs, vapour spaces, valve bonnets and residues where inhibitor cannot reach. Once seeded it continues under conditions that would not start a normal polymerisation, and it grows mechanically enough to jam valves and distort equipment. The controls are housekeeping controls: no unswept dead legs, no long-standing residues, no lines left full between campaigns, and clean vessels before refilling. It is not a reason to avoid methacrylate monomers, but it is a reason to design the pipework as if the monomer were reactive, because it is.

How does the butyl ester change a copolymer compared with the methyl one?

The four-carbon ester side chain is flexible and bulky, so it loosens chain packing and lowers the temperature at which the polymer softens. Against the methyl ester it gives a softer, more flexible and more extensible polymer, better adhesion and easier film formation, at the cost of hardness and block resistance. Against the corresponding acrylate it gives a harder polymer with the weathering advantage of the methacrylate backbone. Formulators use it as the soft component of an all-methacrylate system, which keeps the durability while tuning flexibility.

Che cos'è Propilenglicole?

Propilenglicole è un composto chimico registrato con il numero CAS 57-55-6. Formula bruta: C3H8O2. Massa molare: 76.09 g/mol. IUPAC: propane-1,2-diol.

Qual è il numero CAS di Propilenglicole?

Il numero CAS di Propilenglicole è 57-55-6 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Propilenglicole?

Formula bruta: C3H8O2. Massa molare: 76.09 g/mol. logP (XLogP3): -0.9. PSA: 40.5 Å².

Quali sono i pericoli GHS di Propilenglicole?

Secondo la classificazione GHS, Propilenglicole deve riportare le seguenti indicazioni di pericolo: H336 (Può provocare sonnolenza o vertigini.), H370 (Provoca danni agli organi.), H372 (Provoca danni agli organi in caso di esposizione prolungata o ripetuta.).

Dove acquistare Propilenglicole?

Propilenglicole è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/propylene-glycol/

Da dove provengono i dati chimici di Propilenglicole?

I dati chimici di Propilenglicole provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 1030. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Propilenglicole

CAS 57-55-6 · C₃H₈O₂ · MW 76.09 g/mol

Informazioni su Propilenglicole

Propilenglicole è un composto chimico registrato con il numero CAS 57-55-6, con formula bruta C₃H₈O₂, e massa molare di 76.09 g/mol.

La molecola contiene 13 atomi collegati da 12 legami chimici. Il nome sistematico IUPAC completo di questo composto è propane-1,2-diol. Il modello 3D interattivo qui sopra permette di visualizzare la disposizione spaziale degli atomi — puoi ruotarlo con il mouse, zoomare con la rotellina e passare tra le modalità di visualizzazione scheletro / Ball & Stick / Space Fill.

Dal punto di vista delle proprietà chimico-fisiche, il coefficiente di ripartizione logP = -0.9 (valore negativo, composto idrofilo), superficie polare PSA = 40.5 Å², 2 donatori e 2 accettori di legami a idrogeno. Questi parametri sono fondamentali per valutare la biodisponibilità e l'interazione con le biomolecole.

I dati chimici di questo composto provengono da PubChem (NIH NLM NCBI), uno dei più grandi database chimici al mondo. Tutte le informazioni sono aggiornate automaticamente e arricchite con le traduzioni delle indicazioni di pericolo GHS conformi al Regolamento CLP (CE 1272/2008). Il widget qui sopra può essere utilizzato per scopi educativi, di ricerca e commerciali.

Proprietà chimico-fisiche

Wzór sumaryczny	C₃H₈O₂
Masa molowa	76.09 g/mol
IUPAC	propane-1,2-diol
SMILES	`CC(CO)O`
InChIKey	`DNIAPMSPPWPWGF-UHFFFAOYSA-N`
logP (XLogP3)	-0.9
PSA	40.5 Å²
HBD / HBA	2 / 2
PubChem CID	CID 1030 ↗

Sicurezza GHS

Sygnał: Niebezpieczeństwo

GHS07

GHS08

H336 — Może wywoływać uczucie senności lub zawroty głowy

H370 — Powoduje uszkodzenie narządów

H372 — Powoduje uszkodzenie narządów poprzez długotrwałe lub powtarzane narażenie

Letteratura scientifica

Literatura naukowa

20 artykułów · 8 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (20 artykułów)

Wysokość słupka = liczba artykułów w roku. Hover dla szczegółów.

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The crystal structure of coenzyme B12-dependent glycerol dehydratase in complex with cobalamin and propane-1,2-diol.

et al. (2002)

Cytowania: 78Open AccessDOI ↗PubMed ↗PDF ↗

Occurrence of 3-chloro-propane-1,2-diol (3-MCPD) and related compounds in foods: a review.

et al. (2002)

Cytowania: 80$ PaywallDOI ↗PubMed ↗

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Re-evaluation of propane-1,2-diol (E 1520) as a food additive.

et al. (2018)

Cytowania: 6Open AccessDOI ↗PubMed ↗PDF ↗

Solubility and thermodynamic behavior of vanillin in propane-1,2-diol+water cosolvent mixtures at different temperatures.

et al. (2015)

Cytowania: 14$ PaywallDOI ↗PubMed ↗

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Molecular-Level Interactions in Binary Mixtures of 1-Ethyl-3-methylimidazolium Ethylsulfate and Propane-1,2-diol: The Interplay between Intermolecular and Intramolecular Hydrogen Bonding.

(2023)

Cytowania: 2Open AccessDOI ↗PubMed ↗PDF ↗

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Re-evaluation of propane-1,2-diol esters of fatty acids (E 477) as a food additive.

et al. (2018)

Cytowania: 2Open AccessDOI ↗PubMed ↗PDF ↗

Validated method for the determination of propane-1,2-diol, butane-2,3-diol, and propane-1,3-diol in cheese and bacterial cultures using phenylboronic esterification and GC-MS.

et al. (2017)

Cytowania: 5$ PaywallDOI ↗PubMed ↗

3-(4-(tert-Octyl)phenoxy)propane-1,2-diol suppresses inflammatory responses via inhibition of multiple kinases.

et al. (2012)

Cytowania: 31$ PaywallDOI ↗PubMed ↗

Synthesis and stability studies of the glutathione and N-acetylcysteine adducts of an iminoquinone reactive intermediate generated in the biotransformation of 3-(N-phenylamino)propane-1,2-diol: implications for toxic oil syndrome.

(2005)

Cytowania: 13$ PaywallDOI ↗PubMed ↗

Perfusion of rabbit kidneys with solutions containing propane-1,2-diol.

et al. (1987)

Cytowania: 12$ PaywallDOI ↗PubMed ↗

A pharmacological study of propane-1,2-diol.

et al. (1982)

Cytowania: 12$ PaywallPubMed ↗

Isobaric Vapor–Liquid Equilibrium for Two Binary Systems{Propane-1,2-diol + Ethane-1,2-diol and Propane-1,2-diol + Butane-1,2-diol} at <i>p</i> = (10.0, 20.0, and 40.0) kPa

Changsheng Yang, Xue Feng, Yankai Sun et al. (2015) · Journal of Chemical & Engineering Data

Cytowania: 23$ PaywallDOI ↗

Cryopreservation of human skin with propane-1,2-diol.

et al. (1996)

Cytowania: 10$ PaywallDOI ↗PubMed ↗

Cryopreservation of human platelets with propane-1,2-diol.

(1990)

Cytowania: 9$ PaywallDOI ↗PubMed ↗

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3-(2-Chloro-5-methylphenoxy)propane-1,2-diol

Alexander A. Bredikhin, Zemfira A. Bredikhina, Aida I. Samigullina et al. (2023) · Molbank

Open AccessDOI ↗PDF ↗

Densities and Viscosities for Binary Liquid Mixtures of Butan-1-ol + Propane-1,2-diol, + Butane-1,2-diol and 2-Methylpropan-1-ol + Propane-1,2-diol, + Butane-1,2-diol from 298.15 to 333.15 K at 0.1 MPa

José J. Cano-Gómez, Gustavo A. Iglesias-Silva, Luis D. Cortez-Sánchez et al. (2017) · Journal of Chemical & Engineering Data

Cytowania: 8$ PaywallDOI ↗

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The Additive Influence of Propane-1,2-Diol on SDS Micellar Structure and Properties.

Gudelj M, Šurina P, Jurko L et al. (2021) · Molecules (Basel, Switzerland)

Cytowania: 3Open AccessDOI ↗PubMed ↗PDF ↗

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Re-evaluation of propane-1,2-diol alginate (E 405) as a food additive.

EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS), Younes M, Aggett P et al. (2018) · EFSA journal. European Food Safety Authority

Cytowania: 3Open AccessDOI ↗PubMed ↗PDF ↗

Novel mutual pro-drugs of 2',3'-dideoxyinosine with 3-octadecyloxy-propane-1,2-diol by straightforward enzymatic regioselective synthesis in acetone.

et al. (2005)

Cytowania: 3$ PaywallDOI ↗PubMed ↗

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Synthesis and Hydrophilicity Analysis of bis(propane-1,2-diol) Terminated Polydimethylsiloxanes (PDMSs).

(2022)

Cytowania: 2Open AccessDOI ↗PubMed ↗PDF ↗

Dane z PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary wygenerowane przez Semantic Scholar TLDR. Artykuły z ikoną wymagają płatnego dostępu.

Sinonimi

propylene glycol · 1,2-propanediol · 57-55-6 · propane-1,2-diol · 1,2-Propylene glycol · 1,2-dihydroxypropane · 2-Hydroxypropanol · Isopropylene glycol · Dowfrost · Sirlene · Methylethyl glycol · Methylethylene glycol · Monopropylene glycol · Trimethyl glycol · Propylene Glycol USP

Fonti dei dati

📊 PubChem CID 1030 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Acquista nel negozio

Propylene Glycol →

Molecole correlate

Trichloroethylene CAS 127-18-4 · C2Cl4 Succinic Acid CAS 110-15-6 · C4H6O4 Sodium Dodecyl Sulfonate (SDS) CAS 2386-53-0 · C12H25NaO3S Dimethylformamide CAS 68-12-2 · C3H7NO Propylene carbonate CAS 108-32-7 · C4H6O3 Iron oxide black CAS 12227-89-3 · Fe₃O₄