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Methylene Chloride？

Methylene Chloride 是一种化学品，CAS 登记号为 75-09-2。分子式: CH₂Cl₂. 摩尔质量: 84.93 g/mol.

Methylene Chloride 的 CAS 号是多少？

Methylene Chloride 的 CAS 号为 75-09-2——化学文摘社 (CAS) 的唯一标识符。

Methylene Chloride 的分子式是什么？

分子式: CH₂Cl₂. 摩尔质量: 84.93 g/mol. logP (XLogP3): 1.25.

Methylene Chloride 有哪些 GHS 危害？

根据 GHS 分类，Methylene Chloride 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)).

在哪里可以购买Methylene Chloride？

Methylene Chloride 在我们的商店有售。查看产品：https://epchems.online/products/methylene-chloride/

Methylene Chloride 的化学数据来自哪里？

Methylene Chloride 的化学数据来自权威来源：PubChem (NIH)。 PubChem CID: 6344. 符合 CLP 法规（EC 1272/2008），依据 CC-BY 4.0 许可提供。

Methylene Chloride

Dichlorometan

CAS 75-09-2 · CH₂Cl₂ · MW 84.93 g/mol

关于 Methylene Chloride

Methylene Chloride 是一种化学品，登记号为 CAS 75-09-2，分子式为 CH₂Cl₂，摩尔质量为 84.93 g/mol。

该分子包含 5 个原子，通过 4 个化学键连接。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 = 1.25 (正值，亲脂性化合物)。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	CH₂Cl₂
Masa molowa	84.93 g/mol
IUPAC	—
SMILES	`ClCCl`
InChIKey	—
logP (XLogP3)	1.25
PSA	—
HBD / HBA	—
PubChem CID	CID 6344 ↗

GHS 安全

Sygnał: Uwaga

GHS08

H351 — Podejrzewa się, że powoduje raka

科学文献

Literatura naukowa

5 artykułów · 2 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (5 artykułów)

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

NTP Toxicology and Carcinogenesis Studies of Dichloromethane (Methylene Chloride) (CAS No. 75-09-2) in F344/N Rats and B6C3F1 Mice (Inhalation Studies).

(1986) · National Toxicology Program technical report series

AI Summary
Dichloromethane is widely used in industrial processes, food preparation, and agriculture and has been used as an inhalation anesthetic and as a fumigant for grain and strawberries.

Cytowania: 27Influential: 1$ PaywallPubMed ↗

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Studies on the nitration of toluene with a nitric acid(V)/dichloromethane mixture

Andrzej Nastała, Paweł Maksimowski, Waldemar Tomaszewski (2018) · Materiały Wysokoenergetyczne / High Energy Materials

Open AccessDOI ↗PDF ↗

🔓

Aquilariae Lignum Methylene Chloride Fraction Attenuates IL-1β-Driven Neuroinflammation in BV2 Microglial Cells.

Lee JS, Jeon YJ, Kang JY et al. (2020) · International journal of molecular sciences

Open AccessDOI ↗PubMed ↗PDF ↗

Methylene Chloride.

Phillips JA (2018) · Workplace health & safety

$ PaywallDOI ↗PubMed ↗

Methylene Chloride Comment.

Goodwin J, Holm F (2023) · New solutions : a journal of environmental and occupational health policy : NS

$ 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.

同义词

Methylene chloride · DCM

数据来源

📊 PubChem CID 6344 — NIH
🔬 NIST WebBook — spektroskopia
💊 ChEMBL — bioaktywność

在商店购买

Methylene Chloride →