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.

What is Phosphotungstic acid?

Phosphotungstic acid is a chemical compound registered under CAS number 12067-99-1. Molecular formula: W12PHO39·H2O. Molar mass: 2880.1 g/mol. IUPAC: phosphoric acid;dodecakis(trioxotungsten).

What is the CAS number of Phosphotungstic acid?

The CAS number of Phosphotungstic acid is 12067-99-1 — a unique Chemical Abstracts Service (CAS) identifier.

What is the molecular formula of Phosphotungstic acid?

Molecular formula: W12PHO39·H2O. Molar mass: 2880.1 g/mol. PSA: 692 Å².

What are the GHS hazards of Phosphotungstic acid?

Under the GHS classification, Phosphotungstic acid must be labelled with the following hazard statements: H314 (Causes severe skin burns and eye damage).

Where can I buy Phosphotungstic acid?

Phosphotungstic acid is available in our shop. View the product: https://epchems.online/products/phosphotungstic-acid/

Where does the chemical data for Phosphotungstic acid come from?

Chemical data for Phosphotungstic acid comes from authoritative sources: PubChem (NIH). PubChem CID: 90478944. Compliant with the CLP Regulation (EC 1272/2008), available under the CC-BY 4.0 licence.

Phosphotungstic acid

Tungsten hydroxide oxide phosphate

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

About Phosphotungstic acid

Phosphotungstic acid is a chemical compound registered under number CAS 12067-99-1, with the molecular formula W₁₂PHO₃₉·H₂O, and a molar mass of 2880.1 g/mol.

The molecule contains 56 atoms connected by 43 chemical bonds. The full systematic IUPAC name of this compound is phosphoric acid;dodecakis(trioxotungsten). The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.

In terms of physicochemical properties, polar surface area PSA = 692 Å², 3 donors and 40 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.

Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The widget above may be used for educational, research and commercial purposes.

Physicochemical properties

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 ↗

GHS safety

Sygnał: Niebezpieczeństwo

GHS05

H314 — Powoduje poważne oparzenia skóry oraz uszkodzenia oczu

Scientific literature

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.

Synonyms

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

Data sources

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

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Related molecules

Glycidyl methacrylate CAS 106-91-2 · C7H10O3 L-Leucine CAS 61-90-5 · C6H13NO2 Trichloroethylene CAS 79-01-6 · C2HCl3 Dipropylene glycol mono propyl ether CAS 35884-42-5 · C10H22O3 1,2-Propylene Diacetate (PGDA) CAS 623-84-7 · C7H12O4 4-Methyl-2-pentanone CAS 108-10-1 · C6H12O