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.

Wat is Trichloroethylene?

Trichloroethylene is een chemische verbinding, geregistreerd onder CAS-nummer 127-18-4. Brutoformule: C2Cl4. Molaire massa: 165.8 g/mol. IUPAC: 1,1,2,2-tetrachloroethene.

Wat is het CAS-nummer van Trichloroethylene?

Het CAS-nummer van Trichloroethylene is 127-18-4 — een unieke identificatie van de Chemical Abstracts Service (CAS).

Wat is de brutoformule van Trichloroethylene?

Brutoformule: C2Cl4. Molaire massa: 165.8 g/mol. logP (XLogP3): 3.4. PSA: 0 Å².

Wat zijn de GHS-gevaren van Trichloroethylene?

Volgens de GHS-classificatie moet Trichloroethylene worden voorzien van de volgende gevarenaanduidingen: H351 (Verdacht van het veroorzaken van kanker.), H411 (Giftig voor in het water levende organismen, met langdurige gevolgen.).

Waar kan ik Trichloroethylene kopen?

Trichloroethylene is verkrijgbaar in onze winkel. Bekijk het product: https://epchems.online/products/trichloroethylene-127-18-4/

Waar komen de chemische gegevens voor Trichloroethylene vandaan?

De chemische gegevens voor Trichloroethylene zijn afkomstig van gezaghebbende bronnen: PubChem (NIH), ChEMBL (EBI). PubChem CID: 31373. Conform de CLP-verordening (EG 1272/2008), beschikbaar onder de CC-BY 4.0-licentie.

Trichloroethylene

Tetrachloroethylene

CAS 127-18-4 · C₂Cl₄ · MW 165.8 g/mol

Over Trichloroethylene

Trichloroethylene is een chemische verbinding, geregistreerd onder nummer CAS 127-18-4, met de brutoformule C₂Cl₄, en een molaire massa van 165.8 g/mol.

Het molecuul bevat 6 atomen verbonden door 5 chemische bindingen. De volledige systematische IUPAC-naam van deze verbinding is 1,1,2,2-tetrachloroethene. Het interactieve 3D-model hierboven toont de ruimtelijke rangschikking van de atomen — u kunt het met de muis draaien, met het scrollwiel inzoomen en schakelen tussen de weergavemodi skelet / Ball & Stick / Space Fill.

Wat de fysisch-chemische eigenschappen betreft, de verdelingscoëfficiënt logP = 3.4 (positieve waarde, lipofiele verbinding), polair oppervlak PSA = 0 Å², 0 donoren en 0 waterstofbrugacceptoren. Deze parameters zijn cruciaal bij de beoordeling van de biobeschikbaarheid en de interactie met biomoleculen.

De chemische gegevens voor deze verbinding zijn afkomstig van PubChem (NIH NLM NCBI), een van de grootste chemische databanken ter wereld. Alle informatie wordt automatisch bijgewerkt en verrijkt met vertalingen van GHS-gevarenaanduidingen conform de CLP-verordening (EG 1272/2008). De bovenstaande widget mag worden gebruikt voor educatieve, onderzoeks- en commerciële doeleinden.

Fysisch-chemische eigenschappen

Wzór sumaryczny	C₂Cl₄
Masa molowa	165.8 g/mol
IUPAC	1,1,2,2-tetrachloroethene
SMILES	`C(=C(Cl)Cl)(Cl)Cl`
InChIKey	`CYTYCFOTNPOANT-UHFFFAOYSA-N`
logP (XLogP3)	3.4
PSA	0 Å²
HBD / HBA	0 / 0
PubChem CID	CID 31373 ↗

GHS-veiligheid

Sygnał: Uwaga

GHS08

GHS09

H351 — Podejrzewa się, że powoduje raka

H411 — Działa toksycznie na organizmy wodne, powodując długotrwałe skutki

Wetenschappelijke literatuur

Literatura naukowa

20 artykułów · 4 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (20 artykułów)

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

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Evaluación del riesgo químico por inhalación de percloroetileno en el sector de lavado en seco: comparación entre evaluación cualitativa y cuantitativa, a propósito de un caso.

Acero Mena JD, López-Castro KR, Zambrano-Carrillo MF (2025) · Archivos de prevencion de riesgos laborales

Open AccessDOI ↗PubMed ↗PDF ↗

Tetrachloroethene-dehalogenating bacteria

J. Damborský (1999) · Folia Microbiologica

Cytowania: 37$ PaywallDOI ↗

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Sorption-mediated organohalide respiration biokinetics of tetrachloroethene.

Ting Y, Lombard N, Sowers KR et al. (2026) · Water research

Open AccessDOI ↗PubMed ↗PDF ↗

Tetrachloroethene (C2Cl4)

(2011) · Gaseous Electronics

$ PaywallDOI ↗

Tetrachloroethylene Is Associated With Presence of Significant Liver Fibrosis: A National Cross-Sectional Study in US Adults.

Su Y, Dodge JL, Lee BP (2025) · Liver international : official journal of the International Association for the Study of the Liver

$ PaywallDOI ↗PubMed ↗

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Nonalcoholic Fatty Liver Disease Is a Susceptibility Factor for Perchloroethylene-Induced Liver Effects in Mice.

Cichocki JA, Furuya S, Luo YS et al. (2017) · Toxicological sciences : an official journal of the Society of Toxicology

Open AccessDOI ↗PubMed ↗PDF ↗

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Maternal long-term inhalation exposure to perchloroethylene and prenatal teratogenicity: morphometric, hormonal, and histological study.

Mirazi N, Amini E, Hosseini A et al. (2023) · Toxicology mechanisms and methods

Open AccessDOI ↗PubMed ↗PDF ↗

Tetrachloroethylene.

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

$ PaywallPubMed ↗

Mechanism of biochar functional groups in the catalytic reduction of tetrachloroethylene by sulfides.

Yang Y, Piao Y, Wang R et al. (2022) · Environmental pollution (Barking, Essex : 1987)

$ PaywallDOI ↗PubMed ↗

Biological Enhancement of Tetrachloroethene Dissolution and Associated Microbial Community Changes

$ PaywallDOI ↗

Harnessing Sewage Sludge Microbiota from Wastewater Treatment Plants for Tetrachloroethene Detoxification

$ PaywallDOI ↗

Experimental Evaluation and Mathematical Modeling of Microbially-Enhanced Tetrachloroethene (PCE) Dissolution

$ PaywallDOI ↗

A Modeling Study and Implications of Competition between Dehalococcoides ethenogenes and Other Tetrachloroethene-Respiring Bacteria

$ PaywallDOI ↗

Harnessing Sewage Sludge Microbiota from Wastewater Treatment Plants for Tetrachloroethene Detoxification

$ PaywallDOI ↗

Genomic Characterization of Dehalococcoides mccartyi Strain JNA That Reductively Dechlorinates Tetrachloroethene and Polychlorinated Biphenyls

$ PaywallDOI ↗

Tetrachloroethene reductive dehalogenase

· Springer Handbook of Enzymes

$ PaywallDOI ↗

Genomic Characterization of Dehalococcoides mccartyi Strain JNA That Reductively Dechlorinates Tetrachloroethene and Polychlorinated Biphenyls

$ PaywallDOI ↗

Bioenhanced Dissolution of a Tetrachloroethene (PCE) Pool in a Sand Tank Aquifer System

Sara Klemm

$ PaywallDOI ↗

Tetrachloroethene reductive dehalogenase—PceA

Harry Morrison (2021) · Enzyme Active Sites and their Reaction Mechanisms

$ PaywallDOI ↗

Organohalide-Respiring Bacteria in Polluted Urban Rivers Employ Novel Bifunctional Reductive Dehalogenases to Dechlorinate Polychlorinated Biphenyls and Tetrachloroethene

$ PaywallDOI ↗

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

Synoniemen

TETRACHLOROETHYLENE · Tetrachloroethene · 127-18-4 · Perchloroethylene · Tetrachlorethylene · Perc · Perchlorethylene · Ethene, tetrachloro- · Ethylene tetrachloride · 1,1,2,2-Tetrachloroethylene · Ankilostin · Didakene · Perclene · Tetracap · Tetropil

Gegevensbronnen

📊 PubChem CID 31373 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Kopen in de winkel

Trichloroethylene →

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