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 Phosphotungstic acid?

Phosphotungstic acid è un composto chimico registrato con il numero CAS 12067-99-1. Formula bruta: W12PHO39·H2O. Massa molare: 2880.1 g/mol. IUPAC: phosphoric acid;dodecakis(trioxotungsten).

Qual è il numero CAS di Phosphotungstic acid?

Il numero CAS di Phosphotungstic acid è 12067-99-1 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Phosphotungstic acid?

Formula bruta: W12PHO39·H2O. Massa molare: 2880.1 g/mol. PSA: 692 Å².

Quali sono i pericoli GHS di Phosphotungstic acid?

Secondo la classificazione GHS, Phosphotungstic acid deve riportare le seguenti indicazioni di pericolo: H314 (Provoca gravi ustioni cutanee e gravi lesioni oculari.).

Dove acquistare Phosphotungstic acid?

Phosphotungstic acid è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/phosphotungstic-acid/

Da dove provengono i dati chimici di Phosphotungstic acid?

I dati chimici di Phosphotungstic acid provengono da fonti autorevoli: PubChem (NIH). PubChem CID: 90478944. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Phosphotungstic acid

Tungsten hydroxide oxide phosphate

CAS 12067-99-1 · W₁₂PHO₃₉·H₂O · MW 2880.1 g/mol

Informazioni su Phosphotungstic acid

Phosphotungstic acid è un composto chimico registrato con il numero CAS 12067-99-1, con formula bruta W₁₂PHO₃₉·H₂O, e massa molare di 2880.1 g/mol.

La molecola contiene 56 atomi collegati da 43 legami chimici. Il nome sistematico IUPAC completo di questo composto è phosphoric acid;dodecakis(trioxotungsten). 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 = 692 Å², 3 donatori e 40 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	W₁₂PHO₃₉·H₂O
Masa molowa	2880.1 g/mol
IUPAC	phosphoric acid;dodecakis(trioxotungsten)
SMILES	`OP(=O)(O)O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O`
InChIKey	`IYDGMDWEHDFVQI-UHFFFAOYSA-N`
logP (XLogP3)	—
PSA	692 Å²
HBD / HBA	3 / 40
PubChem CID	CID 90478944 ↗

Sicurezza GHS

Sygnał: Niebezpieczeństwo

GHS05

H314 — Powoduje poważne oparzenia skóry oraz uszkodzenia oczu

Letteratura scientifica

Literatura naukowa

3 artykułów · 1 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (3 artykułów)

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

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Phosphotungstic Acid-treated Picrosirius Red Staining Improves Whole-slide Quantitative Analysis of Collagen in Histological Specimens.

Mukade Y, Kobayashi S, Nishijima Y et al. (2023) · The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society

Open AccessDOI ↗PubMed ↗PDF ↗

Keggin type phosphotungstic acid intercalated copper-chromium-layered double hydroxide reinforced porous hollow fiber as a sorbent for hollow fiber solid phase microextraction of selected chlorophenols besides their quantification via high performance liquid chromatography.

Darvishnejad F, Raoof JB, Ghani M et al. (2023) · Journal of chromatography. A

$ PaywallDOI ↗PubMed ↗

Phosphotungstic Acid 12067‐99‐1.

(2004)

$ PaywallDOI ↗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

Acid, Phosphotungstic · RefChem:900737 · 215-682-7 · 235-087-6 · 12067-99-1 · 5KAC2X78XM · Phosphotungstic Acid · Tungsten hydroxide oxide phosphate · Tungstophosphoric acid · dodecatungstophosphoric acid · phosphoric acid;trioxotungsten · NPW 40 · PHOSPHOTUNGSTIC ACID [MI] · TUNGSTOPHOSPHORIC ACID (H3W12PO40) · USP Solution Phosphotungstic Acid TS Conforms to USP

Fonti dei dati

📊 PubChem CID 90478944 — NIH
🔬 NIST WebBook — spektroskopia
💊 ChEMBL — bioaktywność

Acquista nel negozio

Phosphotungstic acid →

Molecole correlate

Trichloroethylene CAS 127-18-4 · C2Cl4 Isopropyl alcohol CAS 67-63-0 · C3H8O N-Heptane CAS 142-82-5 · C7H16 L-Aspartic acid CAS 56-84-8 · C4H7NO4 L-Lysine CAS 56-87-1 · C6H14N2O2 Sodium Glutamate CAS 142-47-2 · C5H10NNaO5