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Maleic anhydride？

Maleic anhydride 是一种化学品，CAS 登记号为 108-31-6。分子式: C4H2O3. 摩尔质量: 98.06 g/mol. IUPAC: furan-2,5-dione.

Maleic anhydride 的 CAS 号是多少？

Maleic anhydride 的 CAS 号为 108-31-6——化学文摘社 (CAS) 的唯一标识符。

Maleic anhydride 的分子式是什么？

分子式: C4H2O3. 摩尔质量: 98.06 g/mol. logP (XLogP3): -0.1. PSA: 43.4 Å².

Maleic anhydride 有哪些 GHS 危害？

根据 GHS 分类，Maleic anhydride 须标注以下危险说明： H302 (吞咽有害), H372 (长期或反复接触会对器官造成伤害(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)), H314 (造成严重皮肤灼伤和眼损伤), H318 (造成严重眼损伤), H334 (吸入可能导致过敏或哮喘病症状或呼吸困难).

在哪里可以购买Maleic anhydride？

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

Maleic anhydride 的化学数据来自哪里？

Maleic anhydride 的化学数据来自权威来源：PubChem (NIH)。 PubChem CID: 7923. 符合 CLP 法规（EC 1272/2008），依据 CC-BY 4.0 许可提供。

Maleic anhydride

CAS 108-31-6 · C₄H₂O₃ · MW 98.06 g/mol

关于 Maleic anhydride

Maleic anhydride 是一种化学品，登记号为 CAS 108-31-6，分子式为 C₄H₂O₃，摩尔质量为 98.06 g/mol。

该分子包含 9 个原子，通过 9 个化学键连接。该化合物的完整系统 IUPAC 名称为 furan-2,5-dione。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	C₄H₂O₃
Masa molowa	98.06 g/mol
IUPAC	furan-2,5-dione
SMILES	`C1=CC(=O)OC1=O`
InChIKey	`FPYJFEHAWHCUMM-UHFFFAOYSA-N`
logP (XLogP3)	-0.1
PSA	43.4 Å²
HBD / HBA	0 / 3
PubChem CID	CID 7923 ↗

GHS 安全

Sygnał: Niebezpieczeństwo

GHS05

GHS07

GHS08

H302 — Działa szkodliwie po połknięciu

H372 — Powoduje uszkodzenie narządów poprzez długotrwałe lub powtarzane narażenie

H314 — Powoduje poważne oparzenia skóry oraz uszkodzenia oczu

H318 — Powoduje poważne uszkodzenie oczu

H334 — Może powodować objawy alergii lub astmy lub trudności w oddychaniu w następstwie wdychania

H317 — Może powodować reakcję alergiczną skóry

科学文献

Literatura naukowa

11 artykułów · 9 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (11 artykułów)

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

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Potent anti-inflammatory effect of a novel furan-2,5-dione derivative, BPD, mediated by dual suppression of COX-2 activity and LPS-induced inflammatory gene expression via NF-κB inactivation.

et al. (2012)

Cytowania: 26Open AccessDOI ↗PubMed ↗PDF ↗

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Synthesis and PGE(2) production inhibition of 1H-furan-2,5-dione and 1H-pyrrole-2,5-dione derivatives.

et al. (2010)

Cytowania: 19Open AccessDOI ↗PubMed ↗PDF ↗

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Atypical Antidepressant Activity of 3,4-Bis(3,4-Dimethoxyphenyl) Furan-2,5-Dione Isolated from Heart Wood of Cedrus deodara, in Rodents.

et al. (2014)

Cytowania: 11Open AccessDOI ↗PubMed ↗PDF ↗

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Crystal structure of 3-(tri-phenyl-phosphoranyl-idene)-2,5-di-hydro-furan-2,5-dione tetra-hydro-furan monosolvate.

et al. (2018)

Open AccessDOI ↗PubMed ↗PDF ↗

Kinetic fall-off behavior for the Cl + Furan-2,5-dione (C4H2O3, maleic anhydride) reaction.

et al. (2021)

$ PaywallDOI ↗PubMed ↗

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New naphtho[2,1-b]furan-2,5-dione and isocoumarin derivatives from bambusicolous fungus Gelatinomyces siamensis.

et al. (2026)

Open AccessDOI ↗PubMed ↗PDF ↗

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3,4-Bis[4-(4-meth-oxy-phen-oxy)phen-yl]-2,5-dihydro-furan-2,5-dione.

et al. (2011)

Open AccessDOI ↗PubMed ↗PDF ↗

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Crystal structure of pseudoguainolide

Noureddine Beghidja, Samir Benayache, Fadila Benayache et al. (2015) · Acta Crystallographica Section E: Crystallographic Communications

Open AccessDOI ↗PDF ↗

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Aromaticine, a sesquiterpene lactone from Amblyopappus pusillus

Matías López-Rodríguez, Luis Alberto Loyola, Jorge Bórquez et al. (2008) · Acta Crystallographica Section E

Open AccessDOI ↗PDF ↗

[Synthesis and antiproliferative properties of glycosides of bis(indolyl)furan-2,5-dione and bis(indolyl)-1H-pyrrol-2,5-dione].

et al. (1996)

Cytowania: 3$ PaywallPubMed ↗

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BENZOIC ACID MALEIC ANHYDRIDE BENZOIC ACID MALEIC ANHYDRIDE BENZOIC ACID MALEIC ANHYDRIDE.

(1961)

Open AccessDOI ↗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

MALEIC ANHYDRIDE · furan-2,5-dione · 2,5-Furandione · 108-31-6 · Toxilic anhydride · Maleic acid anhydride · cis-Butenedioic anhydride · Dihydro-2,5-dioxofuran · Maleinanhydrid · RCRA waste number U147 · 2,5-Furanedione · Anhydrid kyseliny maleinove · CHEBI:474859 · V5877ZJZ25 · NSC-137651

数据来源

📊 PubChem CID 7923 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

在商店购买

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