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8-Hydroxy-7-(1-naphthylazo)quinoline-5-sulphonic acid

CAS 50539-65-6

5-Quinolinesulfonic acid, 8-hydroxy-7-[2-(1-naphthalenyl)diazenyl]-

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

Molecular structure of 50539-65-6
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

CAS50539-65-6
PubChem CIDNot recorded
DTXSIDDTXSID2068553
FormulaC19H13N3O4S
Mol. Weight379.39 g/mol
SMILESOC1=C(C=C(C2=CC=CN=C12)S(O)(=O)=O)N=NC1=CC=CC2=CC=CC=C12

Data Sources

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Brief citations

8-Hydroxy-7-(1-naphthylazo)quinoline-5-sulphonic acid (CAS 50539-65-6) https://chemicalindependence.com/chemical/50539-65-6/ EPA TSCA Inventory: CAS 50539-65-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory