Flag of the United StatesAmerican Chemical Independence

Nitrogen oxide (N2O3)

CAS 10544-73-7

Molecular structure of 10544-73-7
US productionNot reported
Import value, 2024$75M
Top sourceChina 30%

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 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.

Source Countries
CN 30%ChinaAT 23%AustriaPL 9%PolandCA 8%CanadaCZ 8%Czech Republic

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS10544-73-7
PubChem CIDNot recorded
DTXSIDDTXSID7065120
FormulaN2O3
Mol. Weight76.011 g/mol
SMILES[O-][N+](=O)N=O

Data Sources

← Back to Dashboard

Brief citations

Nitrogen oxide (N2O3) (CAS 10544-73-7) https://chemicalindependence.com/chemical/10544-73-7/ EPA TSCA Inventory: CAS 10544-73-7. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 281129 for CAS 10544-73-7. Reporting year: 2024. https://usatrade.census.gov/