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Acetic anhydride？

Acetic anhydride 是一种化学品，CAS 登记号为 108-24-7。分子式: C4H6O3. 摩尔质量: 102.09 g/mol. IUPAC: acetyl acetate.

Acetic anhydride 的 CAS 号是多少？

Acetic anhydride 的 CAS 号为 108-24-7——化学文摘社 (CAS) 的唯一标识符。

Acetic anhydride 的分子式是什么？

分子式: C4H6O3. 摩尔质量: 102.09 g/mol. logP (XLogP3): -0.1. PSA: 43.4 Å².

Acetic anhydride 有哪些 GHS 危害？

根据 GHS 分类，Acetic anhydride 须标注以下危险说明： H226 (易燃液体和蒸气), H332 (吸入有害), H302 (吞咽有害), H314 (造成严重皮肤灼伤和眼损伤), H335 (可引起呼吸道刺激).

在哪里可以购买Acetic anhydride？

Acetic anhydride 在我们的商店有售。查看产品：https://epchems.online/products/acetic-anhydride/

Acetic anhydride 的化学数据来自哪里？

Acetic anhydride 的化学数据来自权威来源：PubChem (NIH), ChEMBL (EBI)。 PubChem CID: 7918. 符合 CLP 法规（EC 1272/2008），依据 CC-BY 4.0 许可提供。

Acetic anhydride

CAS 108-24-7 · C₄H₆O₃ · MW 102.09 g/mol

关于 Acetic anhydride

Acetic anhydride 是一种化学品，登记号为 CAS 108-24-7，分子式为 C₄H₆O₃，摩尔质量为 102.09 g/mol。

该分子包含 13 个原子，通过 12 个化学键连接。该化合物的完整系统 IUPAC 名称为 acetyl acetate。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 = -0.1 (负值，亲水性化合物)，极性表面积 PSA = 43.4 Å²，0 个氢键供体和 3 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	C₄H₆O₃
Masa molowa	102.09 g/mol
IUPAC	acetyl acetate
SMILES	`CC(=O)OC(=O)C`
InChIKey	`WFDIJRYMOXRFFG-UHFFFAOYSA-N`
logP (XLogP3)	-0.1
PSA	43.4 Å²
HBD / HBA	0 / 3
PubChem CID	CID 7918 ↗

GHS 安全

Sygnał: Niebezpieczeństwo

GHS02

GHS05

GHS07

H226 — Łatwopalna ciecz i pary

H332 — Działa szkodliwie w następstwie wdychania

H302 — Działa szkodliwie po połknięciu

H314 — Powoduje poważne oparzenia skóry oraz uszkodzenia oczu

H335 — Może powodować podrażnienie dróg oddechowych

科学文献

Literatura naukowa

6 artykułów · 0 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (6 artykułów)

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

Ethyl Acetyl Acetate 141‐97‐9

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

$ PaywallDOI ↗

Ethyl Acetyl Acetate 141‐97‐9

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

$ PaywallDOI ↗

Acetic anhydride and vinyl acetate differentially modify the supramolecular structure of starch.

Zhang H, Xu S, Zhang X et al. (2025) · International journal of biological macromolecules

$ PaywallDOI ↗PubMed ↗

Esterification of beta-chitin via intercalation by carboxylic anhydrides.

Yoshifuji A, Noishiki Y, Wada M et al. (2006) · Biomacromolecules

$ PaywallDOI ↗PubMed ↗

Test Method for Acetic Anhydride Content (Assay) of Acetic Anhydride.

$ PaywallDOI ↗PDF ↗

Facile Formation of Acetic Sulfuric Anhydride: Microwave Spectrum, Internal Rotation, and Theoretical Calculations.

$ PaywallDOI ↗PDF ↗

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

ACETIC ANHYDRIDE · Acetyl acetate · 108-24-7 · Acetanhydride · Ethanoic anhydride · Acetyl oxide · Acetyl anhydride · Acetic oxide · Acetic acid, anhydride · acetic acid anhydride · Acetyl ether · Anhydride acetique · Anidride acetica · Octowy bezwodnik · Azijnzuuranhydride

数据来源

📊 PubChem CID 7918 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

在商店购买

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