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Benzoxazolesulfonic acid, 5-(aminosulfonyl)-2-[7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-

CAS 203399-48-8

EPA and Census publish no US supply data for this chemical.

Molecular structure of 203399-48-8
US productionNot reported
Top sourceNo public record

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

Where It Comes From

EPA and Census publish no US supply data for this chemical.

Why It Matters

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

Chemical Identity

CAS203399-48-8
PubChem CIDNot recorded
DTXSIDDTXSID40942490
FormulaC20H19N3O8S2
Mol. Weight493.51 g/mol
SMILESCCN(CC)C1=CC2=C(C=C1)C=C(C1=NC3=C(O1)C(=CC(=C3)S(N)(=O)=O)S(O)(=O)=O)C(=O)O2

Data Sources

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Brief citations

Benzoxazolesulfonic acid, 5-(aminosulfonyl)-2-[7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl]- (CAS 203399-48-8) https://chemicalindependence.com/chemical/203399-48-8/ EPA TSCA Inventory: CAS 203399-48-8. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory