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.

什么是水杨酸？

水杨酸是一种化学品，CAS 登记号为 69-72-7。分子式: C7H6O3. 摩尔质量: 138.12 g/mol. IUPAC: 2-hydroxybenzoic acid.

水杨酸的 CAS 号是多少？

水杨酸的 CAS 号为 69-72-7——化学文摘社 (CAS) 的唯一标识符。

水杨酸的分子式是什么？

分子式: C7H6O3. 摩尔质量: 138.12 g/mol. logP (XLogP3): 2.3. PSA: 57.5 Å².

水杨酸有哪些 GHS 危害？

根据 GHS 分类，水杨酸须标注以下危险说明： H361d (Podejrzewa się, że działa szkodliwie na dziecko w łonie matki), H302 (吞咽有害), H318 (造成严重眼损伤).

在哪里可以购买水杨酸？

水杨酸在我们的商店有售。查看产品：https://epchems.online/products/salicylic-acid/

水杨酸的化学数据来自哪里？

水杨酸的化学数据来自权威来源：PubChem (NIH), ChEMBL (EBI)。 PubChem CID: 338. 符合 CLP 法规（EC 1272/2008），依据 CC-BY 4.0 许可提供。

水杨酸

CAS 69-72-7 · C₇H₆O₃ · MW 138.12 g/mol

关于水杨酸

水杨酸 是一种化学品，登记号为 CAS 69-72-7，分子式为 C₇H₆O₃，摩尔质量为 138.12 g/mol。

该分子包含 16 个原子，通过 16 个化学键连接。该化合物的完整系统 IUPAC 名称为 2-hydroxybenzoic 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 = 2.3 (正值，亲脂性化合物)，极性表面积 PSA = 57.5 Å²，2 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	C₇H₆O₃
Masa molowa	138.12 g/mol
IUPAC	2-hydroxybenzoic acid
SMILES	`C1=CC=C(C(=C1)C(=O)O)O`
InChIKey	`YGSDEFSMJLZEOE-UHFFFAOYSA-N`
logP (XLogP3)	2.3
PSA	57.5 Å²
HBD / HBA	2 / 3
PubChem CID	CID 338 ↗

GHS 安全

Sygnał: Niebezpieczeństwo

GHS05

GHS07

GHS08

? — H361d

H302 — Działa szkodliwie po połknięciu

H318 — Powoduje poważne uszkodzenie oczu

科学文献

Literatura naukowa

20 artykułów · 13 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (20 artykułów)

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

RIFM fragrance ingredient safety assessment, 2-hydroxybenzoic acid, CAS Registry Number 69-72-7.

et al. (2024)

Cytowania: 1$ PaywallDOI ↗PubMed ↗

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Synthesis and evaluation of molecularly imprinted silica gel for 2-hydroxybenzoic Acid in aqueous solution.

(2013)

Cytowania: 7Open AccessDOI ↗PubMed ↗PDF ↗

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5-(Bis(3-(2-hydroxyethyl)-1H-indol-2-yl)methyl)-2-hydroxybenzoic acid (BHIMHA): showing a strategy of designing drug to block lung metastasis of tumors.

et al. (2016)

Cytowania: 5Open AccessDOI ↗PubMed ↗PDF ↗

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Synthesis, Characterization, and Biological Studies of a New Schiff Base Ligand Derived from 5-Amino-2-hydroxybenzoic Acid and Benzaldehyde and its Metal Complexes.

Karwan N. Abdulah, Eman I. Alsalihi, Jamil A. Juma (2025) · Zanin Journal of Science and Engineering

Cytowania: 1Open AccessDOI ↗PDF ↗

Structural, vibrational and quantum chemical investigations on 5-chloro-2-hydroxybenzamide and 5-chloro-2-hydroxybenzoic acid.

et al. (2011)

Cytowania: 4$ PaywallDOI ↗PubMed ↗

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Preclinical Pharmacokinetics and Acute Toxicity in Rats of 5-{[(2E)-3-Bromo-3-carboxyprop-2-enoyl]amino}-2-hydroxybenzoic Acid: A Novel 5-Aminosalicylic Acid Derivative with Potent Anti-Inflammatory Activity.

et al. (2021)

Cytowania: 1Open AccessDOI ↗PubMed ↗PDF ↗

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Pharmacokinetics in Wistar Rats of 5-[(4-Carboxybutanoyl)Amino]-2-Hydroxybenzoic Acid: A Novel Synthetic Derivative of 5-Aminosalicylic Acid (5-ASA) with Possible Anti-Inflammatory Activity.

et al. (2016)

Cytowania: 1Open AccessDOI ↗PubMed ↗PDF ↗

Controlled hydrothermal synthesis of bismuth oxychloride/bismuth oxybromide/bismuth oxyiodide composites exhibiting visible-light photocatalytic degradation of 2-hydroxybenzoic acid and crystal violet.

et al. (2018)

Cytowania: 30$ PaywallDOI ↗PubMed ↗

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The crystal structure of the co-crystal: 2-hydroxybenzoic acid – N′-(butan-2-ylidene)pyridine-4-carbohydrazide, C10H13N3O·C7H6O3

Setshedi Itumeleng B., Smith Mark G. (2021) · Zeitschrift für Kristallographie - New Crystal Structures

Cytowania: 2Open AccessDOI ↗PDF ↗

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Identification of 2-hydroxybenzoic acid derivatives as selective SIRT5 inhibitors.

et al. (2022)

Cytowania: 12Open AccessDOI ↗PubMed ↗PDF ↗

Lead bismuth oxybromide/graphene oxide: Synthesis, characterization, and photocatalytic activity for removal of carbon dioxide, crystal violet dye, and 2-hydroxybenzoic acid.

et al. (2020)

Cytowania: 22$ PaywallDOI ↗PubMed ↗

Synthesis and antibacterial evaluation of 3-Farnesyl-2-hydroxybenzoic acid from Piper multiplinervium.

(2014)

Cytowania: 1$ PaywallDOI ↗PubMed ↗

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Aspirin Derivative 5-(Bis(3-methylbut-2-enyl)amino)-2-hydroxybenzoic Acid Improves Thermotolerance via Stress Response Proteins in <i>Caenorhabditis elegans</i>.

et al. (2018)

Cytowania: 5Open AccessDOI ↗PubMed ↗PDF ↗

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Synthesis, Structural Characterization, and In Silico Evaluation of the Salicylidene Schiff Base 4‑{(<i>E</i>)‑[(2,3-Dihydroxyphenyl)methylidene]amino}-2-hydroxybenzoic Acid as a Promising Scaffold for Human Transthyretin Inhibitor.

(2026)

Cytowania: 1Open AccessDOI ↗PubMed ↗PDF ↗

4-((5-(Tert-butyl)-3-chloro-2-hydroxybenzyl) amino)-2-hydroxybenzoic acid protects against oxygen-glucose deprivation/reperfusion injury.

et al. (2018)

Cytowania: 8$ PaywallDOI ↗PubMed ↗

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Utilizing MOF-Ionic liquid nanocatalyst for the creation of dimethyl carbonate from carbon dioxide

Shulong Liu, Qian Wan, Dulong Feng et al. (2024) · Journal of CO2 Utilization

Cytowania: 2Open AccessDOI ↗PDF ↗

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Two new Zn(ii) coordination polymers incorporating 2-(2,6-dichlorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline: Synthesis and structure

Wang Huilin, Wang Xin, Li Meimiao et al. (2024) · Main Group Metal Chemistry

Cytowania: 2Open AccessDOI ↗PDF ↗

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Ex vivo and in silico evaluations of (E)-5-((benzo[d]thiazol-2-ylimino)(methylthio)methylamino)-2-hydroxybenzoic acid as a β3-adrenoreceptor agonist exerting anti-obesity, anti-inflammatory and hepatoprotective effects on Zucker rats.

et al. (2026)

Open AccessDOI ↗PubMed ↗PDF ↗

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Laura Cristina Cabrera-Pérez, Itzia Irene Padilla-Martínez, Ángel Miliar-García et al. (2026) · PLoS ONE

Open AccessPDF ↗

Polymer complexes. LX. Supramolecular coordination and structures of N(4-(acrylamido)-2-hydroxybenzoic acid) polymer complexes.

et al. (2015)

Cytowania: 2$ 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

salicylic acid · 2-Hydroxybenzoic acid · 69-72-7 · o-hydroxybenzoic acid · 2-Carboxyphenol · o-Carboxyphenol · Retarder W · Rutranex · Salonil · Keralyt · Duoplant · Freezone · Saligel · Ionil · Psoriacid-S-stift

数据来源

📊 PubChem CID 338 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

在商店购买

Salicylic acid →