Sulfuric acid, hafnium(4+) salt (2:1)

CAS 15823-43-5

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

Molecular structure of 15823-43-5 — 1 Hf⁴⁺

US productionCBI

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

Import value, 2024$179M

Import volumeZero

Top sourceMexico 46%

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 283329 · basket

EPA reports by year

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

These shares come from HS customs code 283329, which covers 36 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).

MX 46%MexicoCN 19%ChinaCA 11%CanadaIN 9%IndiaFI 4%Finland

Italy
South Africa
Colombia
United Kingdom
Peru
Czech Republic
Taiwan
Hong Kong
Sweden
Belgium
Singapore
Netherlands
Hungary
Switzerland

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.

Ati

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

CAS15823-43-5

PubChem CID13094115

DTXSIDDTXSID40890765

FormulaHfO8S2

Mol. Weight370.6 g/mol

SMILES[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Hf+4]

Data Sources

EPA CompTox (DSSTox) · DTXSID40890765Retrieved 2026-04-06
PubChem · compound 13094115Retrieved 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

Sulfuric acid, hafnium(4+) salt (2:1) (CAS 15823-43-5) https://chemicalindependence.com/chemical/15823-43-5/ EPA CompTox (DSSTox): DTXSID40890765. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID40890765 PubChem: 13094115. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/13094115 EPA Chemical Data Reporting: 15823-43-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 15823-43-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 283329 for CAS 15823-43-5. Reporting year: 2024. https://usatrade.census.gov/