Cuprous oxide

Drug ingredient

CAS 1317-39-1

This drug ingredient has classified U.S. production volumes. EPA withholds the number 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$32M

Top sourceNorway 50%

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 282550 · narrow

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports 128.9K lb

These shares come from HS customs code 282550, which covers 3 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).

NO 50%NorwayAU 31%AustraliaDE 5%GermanyIT 5%ItalyMX 4%Mexico

China
India
Canada
Hong Kong
South Korea
Netherlands

EPA-registered manufacturers (6)

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

Advanced Micronutrient Products

American Chemet

Koch Industries

Kymera International

Show all 6

Rio Tinto America

2 FDA-registered drug labelers

PureTek Corporation

Uriel Pharmacy Inc.

Why It Matters

Sectors

HealthAgricultureTransportationConstructionMetals & MiningPaints & CoatingsCore Chemicals

Downstream Uses

Appears in 6 drug and cosmetic product listings (FDA).

•Folitin-Z
•Ribotin-E
•Rose Copper
•Foliflex
•Finazol
•Zintrexyl-C

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 4 sectors as 4 functional roles.

•Soil amendments (fertilizers) in Pesticide, Fertilizer, and Other Agricultural Chemical ManufacturingNot Known or Reasonably Ascertainable
•Catalyst in Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (100%)Processing as a reactant
•Catalyst in Petrochemical ManufacturingUse—non-incorporative activities
•Intermediate in Primary Metal Manufacturing (100%)Processing as a reactant
•Surfactant (surface active agent) in Asphalt Paving, Roofing, and Coating Materials ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS1317-39-1

PubChem CID18346908

DTXSIDDTXSID0034489

FormulaCu2O

Mol. Weight143.09 g/mol

SMILESO=[Cu].[Cu]

Data Sources

EPA CompTox (DSSTox) · DTXSID0034489Retrieved 2026-04-06
PubChem · compound 18346908Retrieved 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

Cuprous oxide (CAS 1317-39-1) https://chemicalindependence.com/chemical/1317-39-1/ EPA CompTox (DSSTox): DTXSID0034489. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0034489 PubChem: 18346908. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/18346908 EPA Chemical Data Reporting: 1317-39-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting FDA National Drug Code directory: CAS 1317-39-1. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 282550 for CAS 1317-39-1. Reporting year: 2024. https://usatrade.census.gov/