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 Maleic anhydride?

Maleic anhydride è un composto chimico registrato con il numero CAS 108-31-6. Formula bruta: C4H2O3. Massa molare: 98.06 g/mol. IUPAC: furan-2,5-dione.

Qual è il numero CAS di Maleic anhydride?

Il numero CAS di Maleic anhydride è 108-31-6 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Maleic anhydride?

Formula bruta: C4H2O3. Massa molare: 98.06 g/mol. logP (XLogP3): -0.1. PSA: 43.4 Å².

Quali sono i pericoli GHS di Maleic anhydride?

Secondo la classificazione GHS, Maleic anhydride deve riportare le seguenti indicazioni di pericolo: H302 (Nocivo se ingerito.), H372 (Provoca danni agli organi in caso di esposizione prolungata o ripetuta.), H314 (Provoca gravi ustioni cutanee e gravi lesioni oculari.), H318 (Provoca gravi lesioni oculari.), H334 (Può provocare sintomi allergici o asmatici o difficoltà respiratorie se inalato.).

Dove acquistare Maleic anhydride?

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

Da dove provengono i dati chimici di Maleic anhydride?

I dati chimici di Maleic anhydride provengono da fonti autorevoli: PubChem (NIH). PubChem CID: 7923. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Maleic anhydride

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

Informazioni su Maleic anhydride

Maleic anhydride è un composto chimico registrato con il numero CAS 108-31-6, con formula bruta C₄H₂O₃, e massa molare di 98.06 g/mol.

La molecola contiene 9 atomi collegati da 9 legami chimici. Il nome sistematico IUPAC completo di questo composto è furan-2,5-dione. 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	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 ↗

Sicurezza GHS

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

Letteratura scientifica

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.

Sinonimi

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

Fonti dei dati

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

Acquista nel negozio

Maleic anhydride →

Molecole correlate

Polyethylene glycol CAS 25322-68-3 Phosphotungstic acid CAS 12067-99-1 · W12PHO39·H2O N-Methyl-2-pyrrolidone CAS 872-50-4 · C5H9NO Sodium citrate CAS 68-04-2 · C₆H₅Na₃O₇ Cocamidopropyl betaine CAS 4292-10-8 · C19H38N2O3 Sodium Lauryl Ether Sulfate CAS 68585-34-2