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.

Qu'est-ce que Toluène ?

Toluène est un composé chimique enregistré sous le numéro CAS 108-88-3. Formule brute: C7H8. Masse molaire: 92.14 g/mol.

Quel est le numéro CAS de Toluène ?

Le numéro CAS de Toluène est 108-88-3 — un identifiant unique du Chemical Abstracts Service (CAS).

Quelle est la formule brute de Toluène ?

Formule brute: C7H8. Masse molaire: 92.14 g/mol. logP (XLogP3): 2.73.

Quels sont les dangers GHS de Toluène ?

Selon la classification GHS, Toluène doit porter les mentions de danger suivantes : H225 (Liquide et vapeurs très inflammables.), H304 (Peut être mortel en cas d'ingestion et de pénétration dans les voies respiratoires.), H315 (Provoque une irritation cutanée.), H336 (Peut provoquer somnolence ou vertiges.), H361d (Podejrzewa się, że działa szkodliwie na dziecko w łonie matki).

Où acheter Toluène ?

Toluène est disponible dans notre boutique. Voir le produit : https://epchems.online/products/toluene/

D'où proviennent les données chimiques de Toluène ?

Les données chimiques de Toluène proviennent de sources faisant autorité : PubChem (NIH). PubChem CID: 1140. Conformes au règlement CLP (CE 1272/2008), disponibles sous licence CC-BY 4.0.

Toluène

Toluen

CAS 108-88-3 · C₇H₈ · MW 92.14 g/mol

À propos de Toluène

Toluène est un composé chimique enregistré sous le numéro CAS 108-88-3, de formule brute C₇H₈, et de masse molaire 92.14 g/mol.

La molécule contient 15 atomes reliés par 15 liaisons chimiques. Le modèle 3D interactif ci-dessus permet de visualiser l'arrangement spatial des atomes — vous pouvez le faire pivoter à la souris, zoomer avec la molette et basculer entre les modes de visualisation squelette / Ball & Stick / Space Fill.

Du point de vue des propriétés physico-chimiques, le coefficient de partage logP = 2.73 (valeur positive, composé lipophile). Ces paramètres sont essentiels pour évaluer la biodisponibilité et l'interaction avec les biomolécules.

Les données chimiques de ce composé proviennent de PubChem (NIH NLM NCBI), l'une des plus grandes bases de données chimiques au monde. Toutes les informations sont mises à jour automatiquement et enrichies de traductions des mentions de danger GHS conformes au règlement CLP (CE 1272/2008). Le widget ci-dessus peut être utilisé à des fins éducatives, de recherche et commerciales.

Propriétés physico-chimiques

Wzór sumaryczny	C₇H₈
Masa molowa	92.14 g/mol
IUPAC	—
SMILES	`Cc1ccccc1`
InChIKey	—
logP (XLogP3)	2.73
PSA	—
HBD / HBA	—
PubChem CID	CID 1140 ↗

Sécurité GHS

Sygnał: Niebezpieczeństwo

GHS02

GHS07

GHS08

H225 — Wysoce łatwopalna ciecz i pary

H304 — Połknięcie i dostanie się przez drogi oddechowe może grozić śmiercią

H315 — Działa drażniąco na skórę

H336 — Może wywoływać uczucie senności lub zawroty głowy

? — H361d

H373 — Może powodować uszkodzenie narządów poprzez długotrwałe lub powtarzane narażenie

Littérature scientifique

Literatura naukowa

6 artykułów · 2 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (6 artykułów)

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

Toluene : CAS# 108-88-3 [Spanish]

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Chemobiological synthesis of benzene, toluene, ethylbenzene, and xylene from glucose or glycerol.

Zou X, Kim T, Luo ZW et al. (2025) · Proceedings of the National Academy of Sciences of the United States of America

Open AccessDOI ↗PubMed ↗PDF ↗

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Toluene-2-monooxygenase expression and trichloroethene oxidizing activity of Burkholderia vietnamiensis G4 grown on benzyl alcohol and benzyl esters.

Saito AM, Oyarzún AP, Hyman MR et al. (2025) · Applied microbiology and biotechnology

Open AccessDOI ↗PubMed ↗PDF ↗

Application of static headspace GC-MS for detection of residual trichloroethylene and toluene solvents in β-cyclodextrin.

Kim YK, Kwon SY, Seo YS et al. (2024) · Food research international (Ottawa, Ont.)

$ PaywallDOI ↗PubMed ↗

A novel agent, p-toluenesulfonamide, in the management of malignant pleural effusions.

Luo YH, Yang CC, Wu SC et al. (2025) · Lung cancer (Amsterdam, Netherlands)

$ PaywallDOI ↗PubMed ↗

Prenatal exposure to benzene, toluene, ethylbenzene, and xylene (BTEX) and the risk of autism spectrum disorders in children aged 16-37 months: A prospective cohort study.

Hashemi F, Hoepner L, Hashemi H et al. (2025) · Environmental pollution (Barking, Essex : 1987)

$ PaywallDOI ↗PubMed ↗

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

Synonymes

Toluene · Methylbenzene

Sources des données

📊 PubChem CID 1140 — NIH
🔬 NIST WebBook — spektroskopia
💊 ChEMBL — bioaktywność

Acheter en boutique

Toluene →

Molécules apparentées

Ethylene glycol diacetate CAS 111-55-7 · C6H10O4 1-Propanol (n-Propanol) CAS 71-23-8 · C3H8O Methylene Chloride CAS 75-09-2 · CH₂Cl₂ Dipropylene glycol mono propyl ether CAS 35884-42-5 · C10H22O3 Cyclohexanol CAS 108-93-0 · C6H12O 2-Ethylhexanoic Acid CAS 149-57-5 · C8H16O2