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thorium

CAS 7440-29-1

US productionNot reported
Import value, 2024$1M
Top sourceCanada 59%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 284430 · basket

These shares come from HS customs code 284430, which covers 7 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CA 59%CanadaIT 30%ItalyGB 8%United KingdomCH 3%SwitzerlandDE 1%Germany

Why It Matters

SectorsNot recorded
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS7440-29-1
PubChem CID23960
DTXSIDDTXSID6049800
FormulaTh
Mol. Weight232.038 g/mol
SMILES[Th]

Data Sources

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Brief citations

thorium (CAS 7440-29-1) https://chemicalindependence.com/chemical/7440-29-1/ PubChem: 23960. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/23960 EPA TSCA Inventory: CAS 7440-29-1. Retrieved 2026-04-24. https://www.epa.gov/tsca-inventory FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 284430 for CAS 7440-29-1. Reporting year: 2024. https://usatrade.census.gov/