Chlorine oxide (Cl2O)
CAS 7791-21-1
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 unknownProduction 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 281129 · basket
These shares come from HS customs code 281129, which covers 18 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Italy
- Romania
- Malaysia
- India
- Netherlands
- Ukraine
- Denmark
- Singapore
- Switzerland
- Morocco
- United Kingdom
Why It Matters
No EPA sector or FDA product records name a use for this chemical.
Chemical Identity
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
Chlorine oxide (Cl2O) (CAS 7791-21-1) https://chemicalindependence.com/chemical/7791-21-1/ EPA TSCA Inventory: CAS 7791-21-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 281129 for CAS 7791-21-1. Reporting year: 2024. https://usatrade.census.gov/