Molekula

Antimony(III) oxide

SKU 23517280 CAS 1309-64-4 Sb2O3 MW 291.52 Available on enquiry

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ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Certificate of Analysis with every batch

Antimony(III) oxide is a white or yellowish powder widely used as a flame retardant in plastics, textiles, and rubber, as well as a pigment in ceramics and glass manufacturing. It also serves as a catalyst in chemical synthesis and an intermediate in the production of other antimony compounds. This chemical has a CAS number of 1309-64-4, a molecular formula of Sb₂O₃, and a molecular weight of 291.52 g/mol. It must be stored at ambient conditions and carries a **Danger** signal word due to its toxicity and environmental hazards. Molekula supplies Antimony(III) oxide from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

This substance is available from Molekula on enquiry. Full specification, Safety Data Sheet and Certificate of Analysis documentation are provided with your quotation once our team confirms the grade and pack size you need.

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Overview

SKU: 23517280
CAS Number: 1309-64-4
IUPAC Name: bis(antimony(3+));tris(oxygen(2-))
EC Number: 215-175-0
Molecular Formula: Sb2O3
Molecular Weight: 291.52
Exact Mass: 291.7928
SMILES: [O-2].[O-2].[O-2].[Sb+3].[Sb+3]
InChIKey: GHPGOEFPKIHBNM-UHFFFAOYSA-N
InChI: InChI=1S/3O.2Sb/q3*-2;2*+3
PubChem CID: 14794

Literature values

Published physical properties of the substance, not batch specifications.

Appearance: Crystals, polymorphic
Odour: Odorless
Melting Point: 656 °C
Boiling Point: 1550 °C (partially sublimes)
Water Solubility: Slightly soluble in water
Solubility (other solvents): Soluble in concentrated hydrochloric and sulfuric acids, strong alkalies
Vapour Pressure: 130 Pa at 574 °C
Refractive Index: 1.5144

Source: PubChem CID 14794 (HSDB, ICSC)

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Frequently asked questions

What is antimony(III) oxide (Sb₂O₃) commonly used for?

Antimony(III) oxide is primarily used as a flame retardant in plastics, rubber, textiles, and coatings, as well as in the production of ceramics, glass, and as a catalyst in PET polymerization.

What is the chemical formula and molecular weight of antimony(III) oxide?

The chemical formula is **Sb₂O₃**, and the molecular weight is **291.52 g/mol**.

How should antimony(III) oxide be stored?

Store in a cool, dry, well-ventilated area at ambient temperature, away from incompatible substances and moisture.

What grades or purity levels of antimony(III) oxide does Molekula supply?

Molekula supplies **technical grade** and **high-purity** antimony(III) oxide, depending on the application requirements.

Can Molekula supply antimony(III) oxide in bulk quantities?

Yes, we offer bulk packaging options for antimony(III) oxide, including drums and bulk bags, tailored to your order volume.

What documentation is provided with an order of antimony(III) oxide?

Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.

Related products

Molekula has supplied fine chemicals and biochemicals since 1999, and its facilities are ISO 9001:2015 and ISO 14001:2015 certified. Every dispatched batch is logged with a batch number and matched to a Certificate of Analysis, and Safety Data Sheets are available in five languages.