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 Citrato di trisodio?

Citrato di trisodio è un composto chimico registrato con il numero CAS 68-04-2. Formula bruta: C₆H₅Na₃O₇. Massa molare: 258.07 g/mol. IUPAC: trisodium;2-hydroxypropane-1,2,3-tricarboxylate.

Qual è il numero CAS di Citrato di trisodio?

Il numero CAS di Citrato di trisodio è 68-04-2 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Citrato di trisodio?

Formula bruta: C₆H₅Na₃O₇. Massa molare: 258.07 g/mol. PSA: 141 Å².

Dove acquistare Citrato di trisodio?

Citrato di trisodio è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/sodium-citrate/

Da dove provengono i dati chimici di Citrato di trisodio?

I dati chimici di Citrato di trisodio provengono da fonti autorevoli: PubChem (NIH), ChEMBL (EBI). PubChem CID: 6224. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Citrato di trisodio

Trisodium citrate

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

Informazioni su Citrato di trisodio

Citrato di trisodio è un composto chimico registrato con il numero CAS 68-04-2, con formula bruta C₆H₅Na₃O₇, e massa molare di 258.07 g/mol.

La molecola contiene 21 atomi collegati da 17 legami chimici. Il nome sistematico IUPAC completo di questo composto è trisodium;2-hydroxypropane-1,2,3-tricarboxylate. 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, superficie polare PSA = 141 Å², 1 donatori e 7 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	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 ↗

Sicurezza GHS

Sygnał: Uwaga

GHS07

Letteratura scientifica

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.

Sinonimi

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

Fonti dei dati

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

Acquista nel negozio

Sodium citrate →

Molecole correlate

Tetrahydrofuran CAS 109-99-9 · C4H8O Ethanol CAS 100-42-5 · C8H8 Dipropylene glycol mono propyl ether CAS 35884-42-5 · C10H22O3 Diethylene glycol monohexyl ether CAS 112-59-4 · C10H22O3 N-Methylformamide CAS 123-39-7 · C2H5NO Terephthalic Acid CAS 100-21-0 · C8H6O4