Sodium tungsten oxide (Na2WO4)

CAS 13472-45-2

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

Molecular structure of 13472-45-2 — 2 Na⁺

US productionCBI

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

Import value, 2024$63M

Import volumeZero

Top sourceChina 45%

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 284180 · basket

EPA reports by year

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

These shares come from HS customs code 284180, which covers 14 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 45%ChinaDE 25%GermanyTW 10%TaiwanIN 7%IndiaVN 6%Vietnam

Australia

EPA-registered manufacturers (1)

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

Global Tungsten &Amp; Powders

Why It Matters

Sectors

Metals & Mining

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

•Intermediate in Primary Metal Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS13472-45-2

PubChem CID26052

DTXSIDDTXSID4021420

FormulaNa2O4W

Mol. Weight293.82 g/mol

SMILES[O-][W](=O)(=O)[O-].[Na+].[Na+]

Data Sources

EPA CompTox (DSSTox) · DTXSID4021420Retrieved 2026-04-06
PubChem · compound 26052Retrieved 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

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Brief citations

Sodium tungsten oxide (Na2WO4) (CAS 13472-45-2) https://chemicalindependence.com/chemical/13472-45-2/ EPA CompTox (DSSTox): DTXSID4021420. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4021420 PubChem: 26052. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/26052 EPA Chemical Data Reporting: 13472-45-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 13472-45-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 284180 for CAS 13472-45-2. Reporting year: 2024. https://usatrade.census.gov/