Selenium

CAS 7782-49-2

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

Se79.0 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$6M

Import volume153.9K lb

Top sourcePhilippines 35%

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 280490 · exact

EPA reports by year

2023: US production Confidential · Imports 153.9K lb
2019: US production Confidential · Imports Confidential

Source Countries

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

PH 35%PhilippinesCL 15%ChileDE 12%GermanyJP 8%JapanPL 7%Poland

Ireland

EPA-registered manufacturers (2)

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

Rio Tinto Plc · GB United Kingdom

Rio Tinto America

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Trafigura Trading

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.

Umicore Sa · BE Belgium

Coherent

Umicore Usa

Why It Matters

Sectors

EnergyMetals & 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 3 sectors as 3 functional roles.

•Plating agent in Primary Metal Manufacturing (100%)Processing—incorporation into article
•Fuel agents in Petroleum Refineries (100%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in All Other Basic Inorganic Chemical ManufacturingProcessing as a reactant

Chemical Identity

CAS7782-49-2

PubChem CID6326970

DTXSIDDTXSID9021261

FormulaSe

Mol. Weight78.97 g/mol

SMILES[Se]

Data Sources

EPA CompTox (DSSTox) · DTXSID9021261Retrieved 2026-04-06
PubChem · compound 6326970Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
FDA National Drug Code directoryRetrieved 2026-04-07
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Selenium (CAS 7782-49-2) https://chemicalindependence.com/chemical/7782-49-2/ EPA CompTox (DSSTox): DTXSID9021261. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9021261 PubChem: 6326970. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6326970 EPA Chemical Data Reporting: 7782-49-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting FDA National Drug Code directory: CAS 7782-49-2. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 280490 for CAS 7782-49-2. Reporting year: 2024. https://usatrade.census.gov/