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 Epichlorohydrin ?

Epichlorohydrin est un composé chimique enregistré sous le numéro CAS 106-89-8. Formule brute: C3H5ClO. Masse molaire: 92.52 g/mol. IUPAC: 2-(chloromethyl)oxirane.

Quel est le numéro CAS de Epichlorohydrin ?

Le numéro CAS de Epichlorohydrin est 106-89-8 — un identifiant unique du Chemical Abstracts Service (CAS).

Quelle est la formule brute de Epichlorohydrin ?

Formule brute: C3H5ClO. Masse molaire: 92.52 g/mol. logP (XLogP3): 0.5. PSA: 12.5 Å².

Quels sont les dangers GHS de Epichlorohydrin ?

Selon la classification GHS, Epichlorohydrin doit porter les mentions de danger suivantes : H226 (Liquide et vapeurs inflammables.), H350 (Peut provoquer le cancer.), H331 (Toxique par inhalation.), H311 (Toxique par contact cutané.), H301 (Toxique en cas d'ingestion.).

Où acheter Epichlorohydrin ?

Epichlorohydrin est disponible dans notre boutique. Voir le produit : https://epchems.online/products/epichlorohydrin/

D'où proviennent les données chimiques de Epichlorohydrin ?

Les données chimiques de Epichlorohydrin proviennent de sources faisant autorité : PubChem (NIH), ChEMBL (EBI). PubChem CID: 7835. Conformes au règlement CLP (CE 1272/2008), disponibles sous licence CC-BY 4.0.

Epichlorohydrin

CAS 106-89-8 · C₃H₅ClO · MW 92.52 g/mol

À propos de Epichlorohydrin

Epichlorohydrin est un composé chimique enregistré sous le numéro CAS 106-89-8, de formule brute C₃H₅ClO, et de masse molaire 92.52 g/mol.

La molécule contient 10 atomes reliés par 10 liaisons chimiques. Le nom systématique IUPAC complet de ce composé est 2-(chloromethyl)oxirane. 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 = 0.5 (valeur positive, composé lipophile), surface polaire PSA = 12.5 Å², 0 donneurs et 1 accepteurs de liaisons hydrogène. 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	C₃H₅ClO
Masa molowa	92.52 g/mol
IUPAC	2-(chloromethyl)oxirane
SMILES	`C1C(O1)CCl`
InChIKey	`BRLQWZUYTZBJKN-UHFFFAOYSA-N`
logP (XLogP3)	0.5
PSA	12.5 Å²
HBD / HBA	0 / 1
PubChem CID	CID 7835 ↗

Sécurité GHS

Sygnał: Niebezpieczeństwo

GHS02

GHS05

GHS06

GHS07

GHS08

H226 — Łatwopalna ciecz i pary

H350 — Może powodować raka

H331 — Działa toksycznie w następstwie wdychania

H311 — Działa toksycznie w kontakcie ze skórą

H301 — Działa toksycznie po połknięciu

H314 — Powoduje poważne oparzenia skóry oraz uszkodzenia oczu

H317 — Może powodować reakcję alergiczną skóry

Littérature scientifique

Literatura naukowa

18 artykułów · 1 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (18 artykułów)

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

Via 2-(Chloromethyl)oxirane

C. J. Forsyth, T. J. Murray (2008) · Ethers

$ PaywallDOI ↗

2-(Chloromethyl)oxirane-Related Systems

E. Block (2008) · Sulfur, Selenium, and Tellurium

$ PaywallDOI ↗

Refractive index of 2-(chloromethyl)oxirane

Christian Wohlfarth (2017) · Optical Constants

$ PaywallDOI ↗

Molecular beam Fourier transform microwave spectra of (chloromethyl)cyclopropane and (chloromethyl)oxirane

N. Heineking, J.-U. Grabow, I. Merke (2002) · Journal of Molecular Structure

Cytowania: 11$ PaywallDOI ↗

🔓

Carboxylic acids as proton-containing nucleophiles in the reaction with (chloromethyl)oxirane

(2019) · Voprosy Khimii i Khimicheskoi Tekhnologii

Open AccessDOI ↗PDF ↗

Epichlorohydrin.

(1999) · IARC monographs on the evaluation of carcinogenic risks to humans

Review$ PaywallPubMed ↗

Epichlorohydrin.

National Toxicology Program (2011) · Report on carcinogens : carcinogen profiles

$ PaywallPubMed ↗

Epichlorohydrin.

National Toxicology Program (2002) · Report on carcinogens : carcinogen profiles

$ PaywallPubMed ↗

Epichlorohydrin.

(2004) · Report on carcinogens : carcinogen profiles

$ PaywallPubMed ↗

What are the manifestations of ocular exposure to epichlorohydrin?

Zhang Y, Li M, Le Q et al. (2014) · Journal of occupational and environmental medicine

$ PaywallDOI ↗PubMed ↗

Epoxy-functionalized polyethyleneimine modified epichlorohydrin-cross-linked cellulose aerogel as adsorbents for carbon dioxide capture.

Chen X, Lin J, Wang H et al. (2023) · Carbohydrate polymers

$ PaywallDOI ↗PubMed ↗

Formaldehyde, Polymer with (Chloromethyl)Oxirane and Phenol

(2007) · Hawley's Condensed Chemical Dictionary

$ PaywallDOI ↗

Polypropylene Glycol, (Chloromethyl)Oxirane Polymer 9072‐62‐2

(2004) · Sax's Dangerous Properties of Industrial Materials

$ PaywallDOI ↗

Polypropylene Glycol, (Chloromethyl)Oxirane Polymer 9072‐62‐2

(2012) · Sax's Dangerous Properties of Industrial Materials

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Formaldehyde, Polymer with (Chloromethyl)Oxirane and Phenol 9003‐36‐5

(2004) · Sax's Dangerous Properties of Industrial Materials

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Formaldehyde, Polymer with (Chloromethyl)Oxirane and Phenol 9003‐36‐5

(2012) · Sax's Dangerous Properties of Industrial Materials

$ PaywallDOI ↗

<i> <scp>n</scp> </i> ‐(3‐aminopropyl)‐1,3‐propanediamine Polymer With (chloromethyl)oxirane

(2007) · Hawley's Condensed Chemical Dictionary

$ PaywallDOI ↗

(Chloromethyl)oxirane <undefined optical isomer> C3H5ClO + C3H6O2 (Hydroxymethyl)oxirane

I. Wichterle, J. Linek, Z. Wagner et al. · Landolt-Börnstein - Group IV Physical Chemistry

$ PaywallDOI ↗

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

Synonymes

EPICHLOROHYDRIN · 2-(Chloromethyl)oxirane · 106-89-8 · Epichlorhydrin · 1-Chloro-2,3-epoxypropane · Glycidyl chloride · Epichlorhydrine · Chloromethyloxirane · Oxirane, (chloromethyl)- · Chloropropylene oxide · 2,3-Epoxypropyl chloride · Epichloorhydrine · (CHLOROMETHYL)OXIRANE · 1,2-Epoxy-3-chloropropane · 3-Chloro-1,2-epoxypropane

Sources des données

📊 PubChem CID 7835 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Acheter en boutique

Epichlorohydrin →

Molécules apparentées

1,2-Propylene Diacetate (PGDA) CAS 623-84-7 · C7H12O4 Tetraethylene Glycol CAS 112-60-7 · C8H18O5 Sodium persulfate CAS 7775-27-1 · Na₂O₈S₂ 1,1'-Oxydi-2-propanol CAS 110-98-5 · C6H14O3 L (+)-Tartaric acid CAS 87-69-4 · C4H6O6 L-Cysteine CAS 52-90-4 · C3H7NO2S