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.

Qu'est-ce que Sodium carbonate ?

Sodium carbonate est un composé chimique enregistré sous le numéro CAS 497-19-8. Formule brute: CNa₂O₃. Masse molaire: 105.988 g/mol. IUPAC: disodium;carbonate.

Quel est le numéro CAS de Sodium carbonate ?

Le numéro CAS de Sodium carbonate est 497-19-8 — un identifiant unique du Chemical Abstracts Service (CAS).

Quelle est la formule brute de Sodium carbonate ?

Formule brute: CNa₂O₃. Masse molaire: 105.988 g/mol. PSA: 63.2 Å².

Quels sont les dangers GHS de Sodium carbonate ?

Selon la classification GHS, Sodium carbonate doit porter les mentions de danger suivantes : H319 (Provoque une sévère irritation des yeux.).

Où acheter Sodium carbonate ?

Sodium carbonate est disponible dans notre boutique. Voir le produit : https://epchems.online/products/sodium-carbonate/

D'où proviennent les données chimiques de Sodium carbonate ?

Les données chimiques de Sodium carbonate proviennent de sources faisant autorité : PubChem (NIH), ChEMBL (EBI). PubChem CID: 10340. Conformes au règlement CLP (CE 1272/2008), disponibles sous licence CC-BY 4.0.

Sodium carbonate

CAS 497-19-8 · CNa₂O₃ · MW 105.988 g/mol

À propos de Sodium carbonate

Sodium carbonate est un composé chimique enregistré sous le numéro CAS 497-19-8, de formule brute CNa₂O₃, et de masse molaire 105.988 g/mol.

La molécule contient 6 atomes reliés par 3 liaisons chimiques. Le nom systématique IUPAC complet de ce composé est disodium;carbonate. Le modèle 3D interactif ci-dessus permet de visualiser l'arrangement spatial des atomes — vous pouvez le faire pivoter à la souris, zoomer avec la molette et basculer entre les modes de visualisation squelette / Ball & Stick / Space Fill.

Du point de vue des propriétés physico-chimiques, surface polaire PSA = 63.2 Å², 0 donneurs et 3 accepteurs de liaisons hydrogène. Ces paramètres sont essentiels pour évaluer la biodisponibilité et l'interaction avec les biomolécules.

Les données chimiques de ce composé proviennent de PubChem (NIH NLM NCBI), l'une des plus grandes bases de données chimiques au monde. Toutes les informations sont mises à jour automatiquement et enrichies de traductions des mentions de danger GHS conformes au règlement CLP (CE 1272/2008). Le widget ci-dessus peut être utilisé à des fins éducatives, de recherche et commerciales.

Propriétés physico-chimiques

Wzór sumaryczny	CNa₂O₃
Masa molowa	105.988 g/mol
IUPAC	disodium;carbonate
SMILES	`C(=O)([O-])[O-].[Na+].[Na+]`
InChIKey	`CDBYLPFSWZWCQE-UHFFFAOYSA-L`
logP (XLogP3)	—
PSA	63.2 Å²
HBD / HBA	0 / 3
PubChem CID	CID 10340 ↗

Sécurité GHS

Sygnał: Uwaga

GHS07

H319 — Działa drażniąco na oczy

Littérature scientifique

Literatura naukowa

6 artykułów · 2 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (6 artykułów)

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

Viscosity of the eutectic dilithium carbonate-disodium carbonate-dipotassium carbonate melt

Tatsuhiko Ejima, Yuzuru Sato, Tsutomu Yamamura et al. (1987) · Journal of Chemical & Engineering Data

Cytowania: 44$ PaywallDOI ↗

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Scientific Opinion on the safety evaluation of the active substances, sodium carbonate peroxyhydrate coated with sodium carbonate and sodium silicate, bentonite, sodium chloride, sodium carbonate for use in active food contact materials

EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF) (2013) · EFSA Journal

Cytowania: 3Open AccessDOI ↗PDF ↗

Eutectic Composition of a Salt Hydrate Mixture of Sodium Carbonate and Disodium Hydrogen Phosphate

Yasuyuki Watanabe, Izumi Hirasawa (2018) · KAGAKU KOGAKU RONBUNSHU

Cytowania: 6$ PaywallDOI ↗

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A Novel Complex of Chitosan⁻Sodium Carbonate and Its Properties.

Qian J, Wang X, Shu J et al. (2018) · Marine drugs

Open AccessDOI ↗PubMed ↗PDF ↗

Reducing biomass recalcitrance via mild sodium carbonate pretreatment.

Mirmohamadsadeghi S, Chen Z, Wan C (2016) · Bioresource technology

$ PaywallDOI ↗PubMed ↗

Sodium carbonate improves adherence of two-layer alginate for preliminary impressions of complete dentures.

Denneulin T, Denis C, Béhin P et al. (2022) · American journal of dentistry

$ PaywallPubMed ↗

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

Synonymes

SODIUM CARBONATE · 497-19-8 · Soda Ash · Disodium carbonate · Carbonic acid disodium salt · Sodium carbonate, anhydrous · Calcined soda · Solvay soda · Sodium carbonate anhydrous · Washing soda · Bisodium carbonate · Carbonic acid, disodium salt · Carbonic acid sodium salt · Carbonic acid sodium salt (1:2) · Soda, calcined

Sources des données

📊 PubChem CID 10340 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Acheter en boutique

Sodium carbonate →

Molécules apparentées

Glycerol CAS 56-81-5 · C3H8O3 L-Cystine CAS 30925-07-6 · C6H14Cl2N2O4S2 Diethylene glycol monohexyl ether CAS 112-59-4 · C10H22O3 Tripropylene glycol CAS 24800-44-0 · C9H20O4 Diethylene glycol dimethyl ether CAS 110-71-4 · C4H10O2 L-Phenylalanine CAS 63-91-2 · C9H11NO2