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 Epichlorohydrin?

Epichlorohydrin è un composto chimico registrato con il numero CAS 106-89-8. Formula bruta: C3H5ClO. Massa molare: 92.52 g/mol. IUPAC: 2-(chloromethyl)oxirane.

Qual è il numero CAS di Epichlorohydrin?

Il numero CAS di Epichlorohydrin è 106-89-8 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Epichlorohydrin?

Formula bruta: C3H5ClO. Massa molare: 92.52 g/mol. logP (XLogP3): 0.5. PSA: 12.5 Å².

Quali sono i pericoli GHS di Epichlorohydrin?

Secondo la classificazione GHS, Epichlorohydrin deve riportare le seguenti indicazioni di pericolo: H226 (Liquido e vapori infiammabili.), H350 (Può provocare il cancro.), H331 (Tossico se inalato.), H311 (Tossico per contatto con la pelle.), H301 (Tossico se ingerito.).

Dove acquistare Epichlorohydrin?

Epichlorohydrin è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/epichlorohydrin/

Da dove provengono i dati chimici di Epichlorohydrin?

I dati chimici di Epichlorohydrin provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 7835. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Epichlorohydrin

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

Informazioni su Epichlorohydrin

Epichlorohydrin è un composto chimico registrato con il numero CAS 106-89-8, con formula bruta C₃H₅ClO, e massa molare di 92.52 g/mol.

La molecola contiene 10 atomi collegati da 10 legami chimici. Il nome sistematico IUPAC completo di questo composto è 2-(chloromethyl)oxirane. 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 = 0.5 (valore positivo, composto lipofilo), superficie polare PSA = 12.5 Å², 0 donatori e 1 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	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 ↗

Sicurezza 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

Letteratura scientifica

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

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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.

Sinonimi

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

Fonti dei dati

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

Acquista nel negozio

Epichlorohydrin →

Molecole correlate

Acetic acid CAS 64-19-7 · C₂H₄O₂ Isopropyl acetate CAS 108-21-4 · C5H10O2 Acetone CAS 67-64-1 · C3H6O Cyclohexanol CAS 108-93-0 · C6H12O Toluene CAS 108-88-3 · C7H8 Diethylene glycol CAS 111-46-6 · C4H10O3