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 Iron oxide red?

Iron oxide red is a chemical compound registered under CAS number 1309-37-1. Molecular formula: Fe₂O₃. Molar mass: 159.69 g/mol. IUPAC: oxo(oxoferriooxy)iron.

What is the CAS number of Iron oxide red?

The CAS number of Iron oxide red is 1309-37-1 — a unique Chemical Abstracts Service (CAS) identifier.

What is the molecular formula of Iron oxide red?

Molecular formula: Fe₂O₃. Molar mass: 159.69 g/mol. PSA: 43.4 Å².

What are the GHS hazards of Iron oxide red?

Under the GHS classification, Iron oxide red must be labelled with the following hazard statements: H370 (Causes damage to organs), H372 (Causes damage to organs through prolonged or repeated exposure), H315 (Causes skin irritation), H318 (Causes serious eye damage), H335 (May cause respiratory irritation).

Where can I buy Iron oxide red?

Iron oxide red is available in our shop. View the product: https://epchems.online/products/iron-oxide-red/

Where does the chemical data for Iron oxide red come from?

Chemical data for Iron oxide red comes from authoritative sources: PubChem (NIH). PubChem CID: 518696. Compliant with the CLP Regulation (EC 1272/2008), available under the CC-BY 4.0 licence.

Iron oxide red

Iron oxide (Fe2O3)

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

About Iron oxide red

Iron oxide red is a chemical compound registered under number CAS 1309-37-1, with the molecular formula Fe₂O₃, and a molar mass of 159.69 g/mol.

The molecule contains 5 atoms connected by 4 chemical bonds. The full systematic IUPAC name of this compound is oxo(oxoferriooxy)iron. 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 = 43.4 Å², 0 donors and 3 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	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 ↗

GHS safety

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

Scientific literature

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.

Synonyms

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

Data sources

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

Buy in the shop

Iron oxide red →

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