Ammonium isopolytungstate ((NH4)6[H2W12O40])

CAS 12028-48-7

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.

Import value, 2024$63M

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 Confidential
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

EPA-registered importers (3)

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

Sakai Trading · JP Japan

Haldor Topsoe

Sakai Trading New York

Why It Matters

Sectors

Metals & 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 2 sectors as 2 functional roles.

•Catalyst in Other (100%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in Petrochemical Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS12028-48-7

PubChem CIDNot recorded

DTXSIDDTXSID50894259

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA CompTox (DSSTox) · DTXSID50894259Retrieved 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

Ammonium isopolytungstate ((NH4)6[H2W12O40]) (CAS 12028-48-7) https://chemicalindependence.com/chemical/12028-48-7/ EPA CompTox (DSSTox): DTXSID50894259. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID50894259 EPA Chemical Data Reporting: 12028-48-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 12028-48-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 284180 for CAS 12028-48-7. Reporting year: 2024. https://usatrade.census.gov/