Tungsten hydroxide oxide (W(OH)2O2)

CAS 7783-03-1

EPA’s 2023 records show zero U.S. production of this chemical.

US productionZero

Import value, 2024$123M

Import volumeCBI

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

Top sourceBrazil 32%

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. 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 282590 · basket

EPA reports by year

2023: US production Zero · Imports Confidential
2019: US production Zero · Imports 129.0K lb

These shares come from HS customs code 282590, which covers 34 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).

BR 32%BrazilTR 15%TurkeyCN 9%ChinaVN 8%VietnamKR 8%South Korea

Ireland
Mexico
Spain
Belgium
Switzerland
Trinidad and Tobago
Hong Kong

Domestic parents -- activity not disclosed (1)

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

Cellmark Usa

EPA-registered importers (2)

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

Bayer Ag · DE Germany

Bayer Us Holding

Why It Matters

Sectors

HealthAgricultureElectronics

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 3 sectors as 2 functional roles.

•Intermediate in Computer and Electronic Product ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Catalyst in Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (28%)Use—non-incorporative activities
•Catalyst in Pharmaceutical and Medicine Manufacturing (72%)Use—non-incorporative activities

Chemical Identity

CAS7783-03-1

PubChem CID1152

DTXSIDDTXSID80894161

FormulaH2O4W

Mol. Weight249.85 g/mol

SMILESO[W](=O)(=O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID80894161Retrieved 2026-04-06
PubChem · compound 1152Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Tungsten hydroxide oxide (W(OH)2O2) (CAS 7783-03-1) https://chemicalindependence.com/chemical/7783-03-1/ EPA CompTox (DSSTox): DTXSID80894161. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID80894161 PubChem: 1152. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/1152 EPA Chemical Data Reporting: 7783-03-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 7783-03-1. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 282590 for CAS 7783-03-1. Reporting year: 2024. https://usatrade.census.gov/