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.

Toluene è un composto chimico registrato con il numero CAS 108-88-3. Formula bruta: C7H8. Massa molare: 92.14 g/mol.

Qual è il numero CAS di Toluene?

Il numero CAS di Toluene è 108-88-3 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Toluene?

Formula bruta: C7H8. Massa molare: 92.14 g/mol. logP (XLogP3): 2.73.

Quali sono i pericoli GHS di Toluene?

Secondo la classificazione GHS, Toluene deve riportare le seguenti indicazioni di pericolo: H225 (Liquido e vapori facilmente infiammabili.), H304 (Può essere letale in caso di ingestione e di penetrazione nelle vie respiratorie.), H315 (Provoca irritazione cutanea.), H336 (Può provocare sonnolenza o vertigini.), H361d (Podejrzewa się, że działa szkodliwie na dziecko w łonie matki).

Dove acquistare Toluene?

Toluene è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/toluene/

Da dove provengono i dati chimici di Toluene?

I dati chimici di Toluene provengono da fonti autorevoli: PubChem (NIH). PubChem CID: 1140. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Toluene

Toluen

CAS 108-88-3 · C₇H₈ · MW 92.14 g/mol

Informazioni su Toluene

Toluene è un composto chimico registrato con il numero CAS 108-88-3, con formula bruta C₇H₈, e massa molare di 92.14 g/mol.

La molecola contiene 15 atomi collegati da 15 legami chimici. 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 = 2.73 (valore positivo, composto lipofilo). 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	C₇H₈
Masa molowa	92.14 g/mol
IUPAC	—
SMILES	`Cc1ccccc1`
InChIKey	—
logP (XLogP3)	2.73
PSA	—
HBD / HBA	—
PubChem CID	CID 1140 ↗

Sicurezza 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

Letteratura scientifica

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.

Sinonimi

Toluene · Methylbenzene

Fonti dei dati

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

Acquista nel negozio

Toluene →

Molecole correlate

Tetrahydrofuran CAS 109-99-9 · C4H8O Epichlorohydrin CAS 106-89-8 · C3H5ClO Tripropylene glycol monobutyl ether CAS 55934-93-5 · C13H28O4 L-Phenylalanine CAS 63-91-2 · C9H11NO2 Sodium Glutamate CAS 142-47-2 · C5H10NNaO5 Dimethyl Sulfoxide CAS 67-68-5 · C2H6OS