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.

Wat is Phosphotungstic acid?

Phosphotungstic acid is een chemische verbinding, geregistreerd onder CAS-nummer 12067-99-1. Brutoformule: W12PHO39·H2O. Molaire massa: 2880.1 g/mol. IUPAC: phosphoric acid;dodecakis(trioxotungsten).

Wat is het CAS-nummer van Phosphotungstic acid?

Het CAS-nummer van Phosphotungstic acid is 12067-99-1 — een unieke identificatie van de Chemical Abstracts Service (CAS).

Wat is de brutoformule van Phosphotungstic acid?

Brutoformule: W12PHO39·H2O. Molaire massa: 2880.1 g/mol. PSA: 692 Å².

Wat zijn de GHS-gevaren van Phosphotungstic acid?

Volgens de GHS-classificatie moet Phosphotungstic acid worden voorzien van de volgende gevarenaanduidingen: H314 (Veroorzaakt ernstige brandwonden en oogletsel.).

Waar kan ik Phosphotungstic acid kopen?

Phosphotungstic acid is verkrijgbaar in onze winkel. Bekijk het product: https://epchems.online/products/phosphotungstic-acid/

Waar komen de chemische gegevens voor Phosphotungstic acid vandaan?

De chemische gegevens voor Phosphotungstic acid zijn afkomstig van gezaghebbende bronnen: PubChem (NIH). PubChem CID: 90478944. Conform de CLP-verordening (EG 1272/2008), beschikbaar onder de CC-BY 4.0-licentie.

Phosphotungstic acid

Tungsten hydroxide oxide phosphate

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

Over Phosphotungstic acid

Phosphotungstic acid is een chemische verbinding, geregistreerd onder nummer CAS 12067-99-1, met de brutoformule W₁₂PHO₃₉·H₂O, en een molaire massa van 2880.1 g/mol.

Het molecuul bevat 56 atomen verbonden door 43 chemische bindingen. De volledige systematische IUPAC-naam van deze verbinding is phosphoric acid;dodecakis(trioxotungsten). Het interactieve 3D-model hierboven toont de ruimtelijke rangschikking van de atomen — u kunt het met de muis draaien, met het scrollwiel inzoomen en schakelen tussen de weergavemodi skelet / Ball & Stick / Space Fill.

Wat de fysisch-chemische eigenschappen betreft, polair oppervlak PSA = 692 Å², 3 donoren en 40 waterstofbrugacceptoren. Deze parameters zijn cruciaal bij de beoordeling van de biobeschikbaarheid en de interactie met biomoleculen.

De chemische gegevens voor deze verbinding zijn afkomstig van PubChem (NIH NLM NCBI), een van de grootste chemische databanken ter wereld. Alle informatie wordt automatisch bijgewerkt en verrijkt met vertalingen van GHS-gevarenaanduidingen conform de CLP-verordening (EG 1272/2008). De bovenstaande widget mag worden gebruikt voor educatieve, onderzoeks- en commerciële doeleinden.

Fysisch-chemische eigenschappen

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-veiligheid

Sygnał: Niebezpieczeństwo

GHS05

H314 — Powoduje poważne oparzenia skóry oraz uszkodzenia oczu

Wetenschappelijke literatuur

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.

🔓

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.

Synoniemen

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

Gegevensbronnen

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

Kopen in de winkel

Phosphotungstic acid →

Gerelateerde moleculen

1,1'-Oxydi-2-propanol CAS 110-98-5 · C6H14O3 Terephthalic Acid CAS 100-21-0 · C8H6O4 Sodium hydroxide CAS 1310-73-2 · HNaO Ethanol CAS 100-42-5 · C8H8 L (+)-Arginine CAS 74-79-3 · C6H14N4O2 Dimethyl carbonate CAS 616-38-6 · C3H6O3