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.

Che cos'è Acetic anhydride?

Acetic anhydride è un composto chimico registrato con il numero CAS 108-24-7. Formula bruta: C4H6O3. Massa molare: 102.09 g/mol. IUPAC: acetyl acetate.

Qual è il numero CAS di Acetic anhydride?

Il numero CAS di Acetic anhydride è 108-24-7 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Acetic anhydride?

Formula bruta: C4H6O3. Massa molare: 102.09 g/mol. logP (XLogP3): -0.1. PSA: 43.4 Å².

Quali sono i pericoli GHS di Acetic anhydride?

Secondo la classificazione GHS, Acetic anhydride deve riportare le seguenti indicazioni di pericolo: H226 (Liquido e vapori infiammabili.), H332 (Nocivo se inalato.), H302 (Nocivo se ingerito.), H314 (Provoca gravi ustioni cutanee e gravi lesioni oculari.), H335 (Può irritare le vie respiratorie.).

Dove acquistare Acetic anhydride?

Acetic anhydride è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/acetic-anhydride/

Da dove provengono i dati chimici di Acetic anhydride?

I dati chimici di Acetic anhydride provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 7918. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Acetic anhydride

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

Informazioni su Acetic anhydride

Acetic anhydride è un composto chimico registrato con il numero CAS 108-24-7, con formula bruta C₄H₆O₃, e massa molare di 102.09 g/mol.

La molecola contiene 13 atomi collegati da 12 legami chimici. Il nome sistematico IUPAC completo di questo composto è acetyl acetate. Il modello 3D interattivo qui sopra permette di visualizzare la disposizione spaziale degli atomi — puoi ruotarlo con il mouse, zoomare con la rotellina e passare tra le modalità di visualizzazione scheletro / Ball & Stick / Space Fill.

Dal punto di vista delle proprietà chimico-fisiche, il coefficiente di ripartizione logP = -0.1 (valore negativo, composto idrofilo), superficie polare PSA = 43.4 Å², 0 donatori e 3 accettori di legami a idrogeno. Questi parametri sono fondamentali per valutare la biodisponibilità e l'interazione con le biomolecole.

I dati chimici di questo composto provengono da PubChem (NIH NLM NCBI), uno dei più grandi database chimici al mondo. Tutte le informazioni sono aggiornate automaticamente e arricchite con le traduzioni delle indicazioni di pericolo GHS conformi al Regolamento CLP (CE 1272/2008). Il widget qui sopra può essere utilizzato per scopi educativi, di ricerca e commerciali.

Proprietà chimico-fisiche

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 ↗

Sicurezza GHS

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

Letteratura scientifica

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.

$ PaywallDOI ↗PDF ↗

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

$ 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.

Sinonimi

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

Fonti dei dati

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

Acquista nel negozio

Acetic anhydride →

Molecole correlate

Citric acid monohydrate CAS 77-92-9 · C6H8O7 L-Cystine CAS 30925-07-6 · C6H14Cl2N2O4S2 2-Butanone CAS 78-93-3 · C4H8O Dodecylbenzenesulphonic Acid CAS 27176-87-0 · C₁₈H₃₀O₃S L-Phenylalanine CAS 63-91-2 · C9H11NO2 Diethylene glycol butylether acetate CAS 124-17-4 · C10H20O4