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 Citrate de trisodium ?

Citrate de trisodium est un composé chimique enregistré sous le numéro CAS 68-04-2. Formule brute: C₆H₅Na₃O₇. Masse molaire: 258.07 g/mol. IUPAC: trisodium;2-hydroxypropane-1,2,3-tricarboxylate.

Quel est le numéro CAS de Citrate de trisodium ?

Le numéro CAS de Citrate de trisodium est 68-04-2 — un identifiant unique du Chemical Abstracts Service (CAS).

Quelle est la formule brute de Citrate de trisodium ?

Formule brute: C₆H₅Na₃O₇. Masse molaire: 258.07 g/mol. PSA: 141 Å².

Où acheter Citrate de trisodium ?

Citrate de trisodium est disponible dans notre boutique. Voir le produit : https://epchems.online/products/sodium-citrate/

D'où proviennent les données chimiques de Citrate de trisodium ?

Les données chimiques de Citrate de trisodium proviennent de sources faisant autorité : PubChem (NIH), ChEMBL (EBI). PubChem CID: 6224. Conformes au règlement CLP (CE 1272/2008), disponibles sous licence CC-BY 4.0.

Citrate de trisodium

Trisodium citrate

CAS 68-04-2 · C₆H₅Na₃O₇ · MW 258.07 g/mol

À propos de Citrate de trisodium

Citrate de trisodium est un composé chimique enregistré sous le numéro CAS 68-04-2, de formule brute C₆H₅Na₃O₇, et de masse molaire 258.07 g/mol.

La molécule contient 21 atomes reliés par 17 liaisons chimiques. Le nom systématique IUPAC complet de ce composé est trisodium;2-hydroxypropane-1,2,3-tricarboxylate. 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 = 141 Å², 1 donneurs et 7 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	C₆H₅Na₃O₇
Masa molowa	258.07 g/mol
IUPAC	trisodium;2-hydroxypropane-1,2,3-tricarboxylate
SMILES	`C(C(=O)[O-])C(CC(=O)[O-])(C(=O)[O-])O.[Na+].[Na+].[Na+]`
InChIKey	`HRXKRNGNAMMEHJ-UHFFFAOYSA-K`
logP (XLogP3)	—
PSA	141 Å²
HBD / HBA	1 / 7
PubChem CID	CID 6224 ↗

Sécurité GHS

Sygnał: Uwaga

GHS07

Littérature scientifique

Literatura naukowa

11 artykułów · 5 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (11 artykułów)

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

Experimental and Theoretical Studies of Trisodium‐1,3,5‐Benzene Tricarboxylate as a Low‐Voltage Anode Material for Sodium‐Ion Batteries

Abhinav Tripathi, Yingqian Chen, Harihara Padhy et al. (2019) · Energy Technology

Cytowania: 19$ PaywallDOI ↗

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Zoledronate Trisodium

(2020) · Definitions

Open AccessDOI ↗PDF ↗

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Mangafodipir Trisodium

(2020) · Definitions

Open AccessDOI ↗PDF ↗

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Pentetate Calcium Trisodium

(2020) · Definitions

Open AccessDOI ↗PDF ↗

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Gadofosveset Trisodium

(2020) · Definitions

Open AccessDOI ↗PDF ↗

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Pentetate Zinc Trisodium

(2020) · Definitions

Open AccessDOI ↗PDF ↗

Trisodium Heptaphosphide and Trisodium Undecaphosphide

Wolfgang Hönle, Hans Georg Von Schnering, D. W. Murphy (1995) · Inorganic Syntheses

Cytowania: 6$ PaywallDOI ↗

Trisodium 2-Hydroxypropane-1,2,3-Tricarboxylate Encapsulated Nanocontainer-Based Template-Free Electrochemical Synthesis of Multidimensional Copper/Copper Oxide Nanoparticles

Mona Saini, Nutan Rani, Asifa Mushtaq et al. (2022) · Springer Proceedings in Materials

$ PaywallDOI ↗

Trisodium Pyrophosphate

$ PaywallDOI ↗

Trisodium 8-aminopyrene-1,3,6-trisulfonate

$ PaywallDOI ↗

Specification for Trisodium Phosphate (Discontinued 2001)

$ PaywallDOI ↗

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 citrate · 68-04-2 · TRISODIUM CITRATE · Natrocitral · Citrosodine · Citric acid, trisodium salt · Trisodium citrate, anhydrous · sodium citrate, anhydrous · Citnatin · Citrosodina · Citrosodna · Citreme · trisodium-citrate · anhydrous sodium citrate · Anhydrous trisodium citrate

Sources des données

📊 PubChem CID 6224 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Acheter en boutique

Sodium citrate →

Molécules apparentées

L-Valine CAS 72-18-4 · C5H11NO2 2-Ethylhexanoic Acid CAS 149-57-5 · C8H16O2 Diethylene glycol dimethyl ether CAS 110-71-4 · C4H10O2 Propylene Glycol CAS 57-55-6 · C3H8O2 Ethanol CAS 100-42-5 · C8H8 Ethylene glycol diacetate CAS 111-55-7 · C6H10O4