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.

什么是Trichloroethylene？

Trichloroethylene 是一种化学品，CAS 登记号为 127-18-4。分子式: C2Cl4. 摩尔质量: 165.8 g/mol. IUPAC: 1,1,2,2-tetrachloroethene.

Trichloroethylene 的 CAS 号是多少？

Trichloroethylene 的 CAS 号为 127-18-4——化学文摘社 (CAS) 的唯一标识符。

Trichloroethylene 的分子式是什么？

分子式: C2Cl4. 摩尔质量: 165.8 g/mol. logP (XLogP3): 3.4. PSA: 0 Å².

Trichloroethylene 有哪些 GHS 危害？

根据 GHS 分类，Trichloroethylene 须标注以下危险说明： H351 (怀疑会致癌(说明接触途径――如已确证无其他接触途径造成这一危害)), H411 (对水生生物有毒并具有长期持续影响).

在哪里可以购买Trichloroethylene？

Trichloroethylene 在我们的商店有售。查看产品：https://epchems.online/products/trichloroethylene-127-18-4/

Trichloroethylene 的化学数据来自哪里？

Trichloroethylene 的化学数据来自权威来源：PubChem (NIH), ChEMBL (EBI)。 PubChem CID: 31373. 符合 CLP 法规（EC 1272/2008），依据 CC-BY 4.0 许可提供。

Trichloroethylene

Tetrachloroethylene

CAS 127-18-4 · C₂Cl₄ · MW 165.8 g/mol

关于 Trichloroethylene

Trichloroethylene 是一种化学品，登记号为 CAS 127-18-4，分子式为 C₂Cl₄，摩尔质量为 165.8 g/mol。

该分子包含 6 个原子，通过 5 个化学键连接。该化合物的完整系统 IUPAC 名称为 1,1,2,2-tetrachloroethene。上方的交互式 3D 模型可查看原子的空间排列——您可以用鼠标旋转、用滚轮缩放，并在骨架 / 球棍 (Ball & Stick) / 空间填充 (Space Fill) 显示模式之间切换。

在理化性质方面，分配系数 logP = 3.4 (正值，亲脂性化合物)，极性表面积 PSA = 0 Å²，0 个氢键供体和 0 个氢键受体。这些参数对于评估生物利用度以及与生物分子的相互作用至关重要。

该化合物的化学数据来自 PubChem（NIH NLM NCBI），全球最大的化学数据库之一。所有信息均自动更新，并附有符合 CLP 法规（EC 1272/2008）的 GHS 危险说明翻译。上方的小部件可用于教育、研究和商业用途。

理化性质

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 安全

Sygnał: Uwaga

GHS08

GHS09

H351 — Podejrzewa się, że powoduje raka

H411 — Działa toksycznie na organizmy wodne, powodując długotrwałe skutki

科学文献

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.

同义词

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

数据来源

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

在商店购买

Trichloroethylene →