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Ethylene glycol diacetate？

Ethylene glycol diacetate 是一种化学品，CAS 登记号为 111-55-7。分子式: C6H10O4. 摩尔质量: 146.14 g/mol. IUPAC: 2-acetyloxyethyl acetate.

Ethylene glycol diacetate 的 CAS 号是多少？

Ethylene glycol diacetate 的 CAS 号为 111-55-7——化学文摘社 (CAS) 的唯一标识符。

Ethylene glycol diacetate 的分子式是什么？

分子式: C6H10O4. 摩尔质量: 146.14 g/mol. logP (XLogP3): 0. PSA: 52.6 Å².

Ethylene glycol diacetate 有哪些 GHS 危害？

根据 GHS 分类，Ethylene glycol diacetate 须标注以下危险说明： H315 (造成皮肤刺激), H319 (造成严重眼刺激), H373 (长期或反复接触可能对器官造成伤害(说明已知的所有受影响器官) (说明接触途径――如已确证无其他接触途径造成这一危害)), H413 (可能对水生生物造成长期持续有害影响).

在哪里可以购买Ethylene glycol diacetate？

Ethylene glycol diacetate 在我们的商店有售。查看产品：https://epchems.online/products/ethylene-glycol-diacetate-high/

Ethylene glycol diacetate 的化学数据来自哪里？

Ethylene glycol diacetate 的化学数据来自权威来源：PubChem (NIH), ChEMBL (EBI)。 PubChem CID: 8121. 符合 CLP 法规（EC 1272/2008），依据 CC-BY 4.0 许可提供。

Ethylene glycol diacetate

CAS 111-55-7 · C₆H₁₀O₄ · MW 146.14 g/mol

关于 Ethylene glycol diacetate

Ethylene glycol diacetate 是一种化学品，登记号为 CAS 111-55-7，分子式为 C₆H₁₀O₄，摩尔质量为 146.14 g/mol。

该分子包含 20 个原子，通过 19 个化学键连接。该化合物的完整系统 IUPAC 名称为 2-acetyloxyethyl 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 (负值，亲水性化合物)，极性表面积 PSA = 52.6 Å²，0 个氢键供体和 4 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	C₆H₁₀O₄
Masa molowa	146.14 g/mol
IUPAC	2-acetyloxyethyl acetate
SMILES	`CC(=O)OCCOC(=O)C`
InChIKey	`JTXMVXSTHSMVQF-UHFFFAOYSA-N`
logP (XLogP3)	0
PSA	52.6 Å²
HBD / HBA	0 / 4
PubChem CID	CID 8121 ↗

GHS 安全

Sygnał: Uwaga

GHS07

GHS08

H315 — Działa drażniąco na skórę

H319 — Działa drażniąco na oczy

H373 — Może powodować uszkodzenie narządów poprzez długotrwałe lub powtarzane narażenie

H413 — Może powodować długotrwałe szkodliwe skutki dla organizmów wodnych

科学文献

Literatura naukowa

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

Isobaric VaporLiquid Equilibrium of Binary Mixtures of Ethylene Glycol Diacetate and 1,2-Butanediol Diacetate at 5.00, 10.00, and 15.00 kPa.

$ 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

ETHYLENE GLYCOL DIACETATE · 111-55-7 · Glycol diacetate · 1,2-Diacetoxyethane · Ethylene diacetate · 1,2-Ethanediol diacetate · Ethanediol diacetate · Ethylene acetate · Ethylene glycol, diacetate · Ethylene diethanoate · Aptex Donor H-plus · 1,2-Ethanediol, diacetate · Ethylene di(acetate) · ethane-1,2-diyl diacetate · 9E5JC3Q7WJ

数据来源

📊 PubChem CID 8121 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

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