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 Glutamate monosodique ?

Glutamate monosodique est un composé chimique enregistré sous le numéro CAS 142-47-2. Formule brute: C5H10NNaO5. Masse molaire: 187.13 g/mol. IUPAC: sodium;(4S)-4-amino-5-hydroxy-5-oxopentanoate;hydrate.

Quel est le numéro CAS de Glutamate monosodique ?

Le numéro CAS de Glutamate monosodique est 142-47-2 — un identifiant unique du Chemical Abstracts Service (CAS).

Quelle est la formule brute de Glutamate monosodique ?

Formule brute: C5H10NNaO5. Masse molaire: 187.13 g/mol. PSA: 104 Å².

Où acheter Glutamate monosodique ?

Glutamate monosodique est disponible dans notre boutique. Voir le produit : https://epchems.online/products/sodium-glutamate/

D'où proviennent les données chimiques de Glutamate monosodique ?

Les données chimiques de Glutamate monosodique proviennent de sources faisant autorité : PubChem (NIH), ChEMBL (EBI). PubChem CID: 23689119. Conformes au règlement CLP (CE 1272/2008), disponibles sous licence CC-BY 4.0.

Glutamate monosodique

Monosodium Glutamate

CAS 142-47-2 · C₅H₁₀NNaO₅ · MW 187.13 g/mol

À propos de Glutamate monosodique

Glutamate monosodique est un composé chimique enregistré sous le numéro CAS 142-47-2, de formule brute C₅H₁₀NNaO₅, et de masse molaire 187.13 g/mol.

La molécule contient 22 atomes reliés par 20 liaisons chimiques. Le nom systématique IUPAC complet de ce composé est sodium;(4S)-4-amino-5-hydroxy-5-oxopentanoate;hydrate. 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 = 104 Å², 3 donneurs et 6 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	C₅H₁₀NNaO₅
Masa molowa	187.13 g/mol
IUPAC	sodium;(4S)-4-amino-5-hydroxy-5-oxopentanoate;hydrate
SMILES	`C(CC(=O)[O-])[C@@H](C(=O)O)N.O.[Na+]`
InChIKey	`GJBHGUUFMNITCI-QTNFYWBSSA-M`
logP (XLogP3)	—
PSA	104 Å²
HBD / HBA	3 / 6
PubChem CID	CID 23689119 ↗

Littérature scientifique

Literatura naukowa

4 artykułów · 3 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (4 artykułów)

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

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Monosodium glutamate enhances freeze-dried mouse sperm quality during room-temperature storage.

Ushigome N, Miyashita M, Ito D et al. (2025) · Scientific reports

Open AccessDOI ↗PubMed ↗PDF ↗

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Ribonucleotides differentially modulate oral glutamate detection thresholds.

Amado NJ, Hanselman EC, Harmon CP et al. (2024) · Chemical senses

Open AccessDOI ↗PubMed ↗PDF ↗

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Lipidized analogues of the anorexigenic CART (cocaine- and amphetamine-regulated transcript) neuropeptide show anorexigenic and neuroprotective potential in mouse model of monosodium-glutamate induced obesity.

Charvát V, Strnadová A, Myšková A et al. (2024) · European journal of pharmacology

Open AccessDOI ↗PubMed ↗PDF ↗

In vitro and in vivo genotoxicity studies on monosodium L-glutamate monohydrate.

Takumi A, Kawamata Y, Sakai R et al. (2019) · Regulatory toxicology and pharmacology : RTP

$ 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.

Synonymes

MSG monohydrate · 142-47-2 · Ancoma · Chinese seasoning · Monosodium glutamate monohydrate · monosodium l-glutamate monohydrate · Ajinomoto · Glutacyl · Glutavene · Vetsin · Glutamat sodny · Zest · MONOSODIUM GLUTAMATE · Natriumglutaminat · Glutamate Sodium

Sources des données

📊 PubChem CID 23689119 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Acheter en boutique

Sodium Glutamate →

Molécules apparentées

2-Ethylhexanoic Acid CAS 149-57-5 · C8H16O2 Iron oxide black CAS 12227-89-3 · Fe₃O₄ Dodecylbenzenesulphonic Acid CAS 27176-87-0 · C₁₈H₃₀O₃S Methyl Propanediol CAS 2163-42-0 · C4H10O2 Benzyl Alcohol CAS 100-51-6 · C7H8O Butyl acetate (BTAC) CAS 123-86-4 · C6H12O2