Antimony trioxide

CAS 1309-64-4

U.S. production volumes are classified as confidential business information.

O₃Sb₂291.5 g/mol

no molecular structure to draw

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$219M

Top sourceChina 59%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 282580 · narrow

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 282580, which covers 3 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

CN 59%ChinaBE 21%BelgiumBO 8%BoliviaIT 7%ItalyMY 2%Malaysia

Canada
Taiwan
Netherlands
South Korea
Germany

Domestic parents -- activity not disclosed (6)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Blue Tree Holdings

Special Materials

Teknor Apex

The Shepherd Material Science

Thor Specialties

Show all 6

United Mineral And Chemical

EPA-registered importers (20)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Alfa Sab De Cv · MX Mexico

Basf Se · DE Germany

Lg Chem · KR South Korea

Ravago S A · LU Luxembourg

Alpek Polyester Usa

Show all 20

Apg Polytech

Basf

Dsm Engineering Plastics

Dupont Specialty Products Usa

Emco Chemical Distributors

Flow Polymers

Icc Industries

Lanxess

Lg Chem America

Lx Hausys America

Lyondell Chemical

Metals And Additives

Nyacol Nano Technologies

Revelli Chemicals

Toray Industries (America)

Why It Matters

Sectors

EnergyElectronicsTransportationConstructionMetals & MiningPlastics & RubberTextilesConsumer ProductsPaints & CoatingsCore Chemicals

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 14 sectors as 6 functional roles.

•Chemical reaction regulator in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
•Flame retardant in All Other Chemical Product and Preparation ManufacturingProcessing—incorporation into article
•Flame retardant in Plastics Material and Resin Manufacturing (0%)Processing—incorporation into formulation, mixture, or reaction product
•Catalyst in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
•Brightener in Asphalt Paving, Roofing, and Coating Materials Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Flame retardant in Plastics Product Manufacturing (100%)Processing—incorporation into article
•Flame retardant in Custom Compounding of Purchased Resins (100%)Processing—incorporation into formulation, mixture, or reaction product
•Corrosion inhibitor in Paint and Coating Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Pigment in Synthetic Dye and Pigment Manufacturing (100%)Processing as a reactant
•Flame retardant in Oil and Gas Drilling, Extraction, and Support activitiesProcessing—incorporation into article
•Flame retardant in Synthetic Rubber Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Flame retardant in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Flame retardant in Rubber Product Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Flame retardant in Textiles, apparel, and leather manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Flame retardant in Transportation Equipment ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Flame retardant in Electrical Equipment, Appliance, and Component Manufacturing (50%)Processing—incorporation into article

Vendor Pricing

$0.40/gA2B Chem LLC

CountryUnited States

Pack$100.00 / 250 g

Purity99%

Vendors2 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

1 more vendor

Vendor	Country	$/g	Pack	Purity
AA BLOCKS	United States	$0.45	250 g	99%

Chemical Identity

CAS1309-64-4

PubChem CID14794

DTXSIDDTXSID4023880

FormulaO3Sb2

Mol. Weight291.52 g/mol

SMILES[O-2].[O-2].[O-2].[Sb+3].[Sb+3]

Data Sources

EPA CompTox (DSSTox) · DTXSID4023880Retrieved 2026-04-06
PubChem · compound 14794Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

← Back to Dashboard ← Back to Energy

Brief citations

Antimony trioxide (CAS 1309-64-4) https://chemicalindependence.com/chemical/1309-64-4/ EPA CompTox (DSSTox): DTXSID4023880. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4023880 PubChem: 14794. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/14794 EPA Chemical Data Reporting: 1309-64-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1309-64-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 282580 for CAS 1309-64-4. Reporting year: 2024. https://usatrade.census.gov/