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2-Ethylhexanoic Acid？

2-Ethylhexanoic Acid 是一种化学品，CAS 登记号为 149-57-5。分子式: C8H16O2. 摩尔质量: 144.21 g/mol. IUPAC: 2-ethylhexanoic acid.

2-Ethylhexanoic Acid 的 CAS 号是多少？

2-Ethylhexanoic Acid 的 CAS 号为 149-57-5——化学文摘社 (CAS) 的唯一标识符。

2-Ethylhexanoic Acid 的分子式是什么？

分子式: C8H16O2. 摩尔质量: 144.21 g/mol. logP (XLogP3): 2.6. PSA: 37.3 Å².

在哪里可以购买2-Ethylhexanoic Acid？

2-Ethylhexanoic Acid 在我们的商店有售。查看产品：https://epchems.online/products/isooctanoic-acid-multi/

2-Ethylhexanoic Acid 的化学数据来自哪里？

2-Ethylhexanoic Acid 的化学数据来自权威来源：PubChem (NIH)。 PubChem CID: 8697. 符合 CLP 法规（EC 1272/2008），依据 CC-BY 4.0 许可提供。

2-Ethylhexanoic Acid

CAS 149-57-5 · C₈H₁₆O₂ · MW 144.21 g/mol

关于 2-Ethylhexanoic Acid

2-Ethylhexanoic Acid 是一种化学品，登记号为 CAS 149-57-5，分子式为 C₈H₁₆O₂，摩尔质量为 144.21 g/mol。

该分子包含 26 个原子，通过 25 个化学键连接。该化合物的完整系统 IUPAC 名称为 2-ethylhexanoic acid。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 = 2.6 (正值，亲脂性化合物)，极性表面积 PSA = 37.3 Å²，1 个氢键供体和 2 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	C₈H₁₆O₂
Masa molowa	144.21 g/mol
IUPAC	2-ethylhexanoic acid
SMILES	`CCCCC(CC)C(=O)O`
InChIKey	`OBETXYAYXDNJHR-UHFFFAOYSA-N`
logP (XLogP3)	2.6
PSA	37.3 Å²
HBD / HBA	1 / 2
PubChem CID	CID 8697 ↗

科学文献

Literatura naukowa

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

📈 Timeline publikacji (8 artykułów)

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

Impact of chemical structure on the in vitro hydrolysis of fatty esters of 2-ethylhexanoic acid or 2-ethylhexanol and extrapolation to the in vivo situation.

Obringer C, Lester C, Karb M et al. (2023) · Regulatory toxicology and pharmacology : RTP

$ PaywallDOI ↗PubMed ↗

Inhibition of animal acetyl-coenzyme A carboxylase by 2-(p-chlorophenoxy)-2-methylpropionic acid and 2-ethylhexanoic acid.

Sumida K, Kaneko H, Yoshitake A (1996) · Chemosphere

$ PaywallDOI ↗PubMed ↗

2-Ethylhexanoic acid: subchronic oral toxicity studies in the rat and mouse.

Juberg DR, David RM, Katz GV et al. (1998) · Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association

$ PaywallDOI ↗PubMed ↗

Urine 4-heptanone: a beta-oxidation product of 2-ethylhexanoic acid from plasticisers.

Walker V, Mills GA (2001) · Clinica chimica acta; international journal of clinical chemistry

$ PaywallDOI ↗PubMed ↗

In vitro glucuronidation of peroxisomal proliferators: 2-ethylhexanoic acid enantiomers and their structural analogs.

Hamdoune M, Duclos S, Mounie J et al. (1995) · Toxicology and applied pharmacology

$ PaywallDOI ↗PubMed ↗

Gas chromatographic determination of 2-ethylhexanol and 2-ethylhexanoic acid as derivatives suitable for electron-capture and nitrogen-phosphorus detection after single reaction with heptafluorobutyrylimidazole.

Górski T, Goehl TJ, Jameson CW et al. (1990) · Journal of chromatography

$ PaywallDOI ↗PubMed ↗

In vitro cutaneous metabolism of trioctanoin and transcutaneous passage of 2-ethylhexanoic acid.

(2018)

$ PaywallDOI ↗PDF ↗

Enantioselectivity in the induction of peroxisome proliferation by 2‐ethylhexanoic acid.

(1992)

$ 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

2-ETHYLHEXANOIC ACID · 149-57-5 · 2-Ethylcaproic acid · Hexanoic acid, 2-ethyl- · Ethylhexanoic acid · Ethylhexoic acid · 2-Ethylhexoic acid · Butylethylacetic acid · 2-Butylbutanoic acid · 3-Heptanecarboxylic acid · 2-ethyl-hexoic acid · alpha-Ethylcaproic acid · 2-Ethyl-1-hexanoic acid · 01MU2J7VVZ · alpha-Ethylhexanoic acid

数据来源

📊 PubChem CID 8697 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

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