Tungsten trioxide

CAS 1314-35-8

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

US productionCBI

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

Top sourceNo public record

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.

Where It Comes From

EPA reports by year

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

EPA-registered manufacturers (14)

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

Clariant International · CH Switzerland

Shell Plc · GB United Kingdom

Sumitomo Electric Industries · JP Japan

Clariant

Cormetech

Show all 14

Global Tungsten &Amp; Powders

Haldor Topsoe

Kennametal

Kymera International

Langeloth Metallurgical

Shell Catalyst & Technologies

Shell Catalysts & Technologies

Sumitomo Electric U.S.A. Holdings

W. R. Grace & Co. - Conn.

Domestic parents -- activity not disclosed (2)

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

Albemarle

Honeywell International (123312)

EPA-registered importers (1)

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

Sandvik

Why It Matters

Sectors

EnergyWaterElectronicsMetals & MiningCore 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 5 sectors as 3 functional roles.

•Catalyst in Utilities (100%)Use—non-incorporative activities
•Catalyst in All Other Basic Inorganic Chemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Catalyst in Petroleum RefineriesUse—non-incorporative activities
•Intermediate in Primary Metal Manufacturing (100%)Processing—incorporation into article
•Catalyst in Petrochemical Manufacturing (100%)Use—non-incorporative activities
•Alloys in Primary Metal Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS1314-35-8

PubChem CID14811

DTXSIDDTXSID7032262

FormulaO3W

Mol. Weight231.84 g/mol

SMILESO=[W](=O)=O

Data Sources

EPA CompTox (DSSTox) · DTXSID7032262Retrieved 2026-04-06
PubChem · compound 14811Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

← Back to Dashboard ← Back to Energy

Brief citations

Tungsten trioxide (CAS 1314-35-8) https://chemicalindependence.com/chemical/1314-35-8/ EPA CompTox (DSSTox): DTXSID7032262. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7032262 PubChem: 14811. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/14811 EPA Chemical Data Reporting: 1314-35-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1314-35-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting