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 Iron oxide red?

Iron oxide red è un composto chimico registrato con il numero CAS 1309-37-1. Formula bruta: Fe₂O₃. Massa molare: 159.69 g/mol. IUPAC: oxo(oxoferriooxy)iron.

Qual è il numero CAS di Iron oxide red?

Il numero CAS di Iron oxide red è 1309-37-1 — un identificativo univoco del Chemical Abstracts Service (CAS).

Qual è la formula bruta di Iron oxide red?

Formula bruta: Fe₂O₃. Massa molare: 159.69 g/mol. PSA: 43.4 Å².

Quali sono i pericoli GHS di Iron oxide red?

Secondo la classificazione GHS, Iron oxide red deve riportare le seguenti indicazioni di pericolo: H370 (Provoca danni agli organi.), H372 (Provoca danni agli organi in caso di esposizione prolungata o ripetuta.), H315 (Provoca irritazione cutanea.), H318 (Provoca gravi lesioni oculari.), H335 (Può irritare le vie respiratorie.).

Dove acquistare Iron oxide red?

Iron oxide red è disponibile nel nostro negozio. Vedi il prodotto: https://epchems.online/products/iron-oxide-red/

Da dove provengono i dati chimici di Iron oxide red?

I dati chimici di Iron oxide red provengono da fonti autorevoli: PubChem (NIH). PubChem CID: 518696. Conformi al Regolamento CLP (CE 1272/2008), disponibili con licenza CC-BY 4.0.

Iron oxide red

Iron oxide (Fe2O3)

CAS 1309-37-1 · Fe₂O₃ · MW 159.69 g/mol

Informazioni su Iron oxide red

Iron oxide red è un composto chimico registrato con il numero CAS 1309-37-1, con formula bruta Fe₂O₃, e massa molare di 159.69 g/mol.

La molecola contiene 5 atomi collegati da 4 legami chimici. Il nome sistematico IUPAC completo di questo composto è oxo(oxoferriooxy)iron. 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 = 43.4 Å², 0 donatori e 3 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	Fe₂O₃
Masa molowa	159.69 g/mol
IUPAC	oxo(oxoferriooxy)iron
SMILES	`O=[Fe]O[Fe]=O`
InChIKey	`JEIPFZHSYJVQDO-UHFFFAOYSA-N`
logP (XLogP3)	—
PSA	43.4 Å²
HBD / HBA	0 / 3
PubChem CID	CID 518696 ↗

Sicurezza GHS

Sygnał: Niebezpieczeństwo

GHS05

GHS07

GHS08

H370 — Powoduje uszkodzenie narządów

H372 — Powoduje uszkodzenie narządów poprzez długotrwałe lub powtarzane narażenie

H315 — Działa drażniąco na skórę

H318 — Powoduje poważne uszkodzenie oczu

H335 — Może powodować podrażnienie dróg oddechowych

Letteratura scientifica

Literatura naukowa

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

📈 Timeline publikacji (2 artykułów)

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

🔓

Niobium uptake and release by bacterial ferric ion binding protein

Dominic Campopiano, Sadler, P. J., Harvey, Ian et al. (2010) · Hindawi Publishing Corporation

Cytowania: 8Open AccessDOI ↗PDF ↗

Nanoparticle-Mediated Regulation of Intracellular Ferric Ions to Induce Motor Neuron Differentiation for Spinal Cord Injury Repair.

Lei M, Zhang R, Wang L et al. (2025) · ACS nano

$ PaywallDOI ↗PubMed ↗

Dane z PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary wygenerowane przez Semantic Scholar TLDR. Artykuły z ikoną wymagają płatnego dostępu.

Sinonimi

Iron trioxide · Iron oxide, red · iron(3+) oxide · iron (III) oxide · Anhydrous Ferric Oxide · Anhydrous Iron (III) Oxide · CHEBI:50819 · Ferrum Oxydatum · Iron oxide, · Hematite 8124 · Anhydrous Iron (III) · RefChem:55186 · Ferric oxide (anhydrous) · 616-935-8 · 11554 Red

Fonti dei dati

📊 PubChem CID 518696 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Acquista nel negozio

Iron oxide red →

Molecole correlate

Tripropylene glycol CAS 24800-44-0 · C9H20O4 Trichloroethylene CAS 79-01-6 · C2HCl3 Musk Pure CAS 1222-05-5 · C18H26O Ethylene Carbonate CAS 96-49-1 · C3H4O3 Ethyl Methyl Carbonate CAS 623-53-0 · C4H8O3 L-Leucine CAS 61-90-5 · C6H13NO2