Rhodium-103

CAS 7440-16-6

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

Rh102.9 g/mol

no molecular structure to draw

US productionCBI

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

Import value, 2024$2.2B

Top sourceSouth Africa 58%

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.

Where It Comes From

Customs basis: HS 711031, 711039 · exact

EPA reports by year

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

Source Countries

Country of origin for US imports, from Census customs data (2024).

ZA 58%South AfricaDE 20%GermanyBE 10%BelgiumIT 4%ItalyGB 4%United Kingdom

Japan
United Arab Emirates
Hong Kong
India
Canada
Czech Republic
Chile

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.

Johnson Matthey

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.

Basf Se · DE Germany

Basf

Why It Matters

Sectors

Core 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

•Catalyst in All Other Basic Inorganic Chemical ManufacturingProcessing as a reactant

Chemical Identity

CAS7440-16-6

PubChem CID23948

DTXSIDDTXSID3052480

FormulaRh

Mol. Weight102.9055 g/mol

SMILES[Rh]

Data Sources

EPA CompTox (DSSTox) · DTXSID3052480Retrieved 2026-04-06
PubChem · compound 23948Retrieved 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

Rhodium-103 (CAS 7440-16-6) https://chemicalindependence.com/chemical/7440-16-6/ EPA CompTox (DSSTox): DTXSID3052480. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3052480 PubChem: 23948. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/23948 EPA Chemical Data Reporting: 7440-16-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 7440-16-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 711031,711039 for CAS 7440-16-6. Reporting year: 2024. https://usatrade.census.gov/