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.

What is Acetic anhydride?

Acetic anhydride is a chemical compound registered under CAS number 108-24-7. Molecular formula: C4H6O3. Molar mass: 102.09 g/mol. IUPAC: acetyl acetate.

What is the CAS number of Acetic anhydride?

The CAS number of Acetic anhydride is 108-24-7 — a unique Chemical Abstracts Service (CAS) identifier.

What is the molecular formula of Acetic anhydride?

Molecular formula: C4H6O3. Molar mass: 102.09 g/mol. logP (XLogP3): -0.1. PSA: 43.4 Å².

What are the GHS hazards of Acetic anhydride?

Under the GHS classification, Acetic anhydride must be labelled with the following hazard statements: H226 (Flammable liquid and vapour), H332 (Harmful if inhaled), H302 (Harmful if swallowed), H314 (Causes severe skin burns and eye damage), H335 (May cause respiratory irritation).

Where can I buy Acetic anhydride?

Acetic anhydride is available in our shop. View the product: https://epchems.online/products/acetic-anhydride/

Where does the chemical data for Acetic anhydride come from?

Chemical data for Acetic anhydride comes from authoritative sources: PubChem (NIH), ChEMBL (EBI). PubChem CID: 7918. Compliant with the CLP Regulation (EC 1272/2008), available under the CC-BY 4.0 licence.

Acetic anhydride

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

About Acetic anhydride

Acetic anhydride is a chemical compound registered under number CAS 108-24-7, with the molecular formula C₄H₆O₃, and a molar mass of 102.09 g/mol.

The molecule contains 13 atoms connected by 12 chemical bonds. The full systematic IUPAC name of this compound is acetyl acetate. The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.

In terms of physicochemical properties, the partition coefficient logP = -0.1 (negative value, a hydrophilic compound), polar surface area PSA = 43.4 Å², 0 donors and 3 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.

Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The widget above may be used for educational, research and commercial purposes.

Physicochemical properties

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 safety

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

Scientific literature

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.

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

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Dane z PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary wygenerowane przez Semantic Scholar TLDR. Artykuły z ikoną wymagają płatnego dostępu.

Synonyms

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

Data sources

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

Buy in the shop

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Related molecules

L-Tryptophan CAS 73-22-3 · C11H12N2O2 Isopropyl acetate CAS 108-21-4 · C5H10O2 Sodium bicarbonate CAS 144-55-8 · CHNaO3 Trichloroethylene CAS 127-18-4 · C2Cl4 Acetone CAS 67-64-1 · C3H6O Salicylic acid CAS 69-72-7 · C7H6O3