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2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-[2-[2-(phenoxysulfonyl)phenyl]diazenyl]-, sodium salt (1:1)

CAS 70209-95-9

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

Molecular structure of 70209-95-9
1 Na⁺
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

CAS70209-95-9
PubChem CIDNot recorded
DTXSIDDTXSID40887534
FormulaC22H16N3NaO7S2
Mol. Weight521.49 g/mol
SMILES[Na+].NC1=C(N=NC2=CC=CC=C2S(=O)(=O)OC2=CC=CC=C2)C2=C(C=C1)C=C(C=C2O)S([O-])(=O)=O

Data Sources

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Brief citations

2-Naphthalenesulfonic acid, 6-amino-4-hydroxy-5-[2-[2-(phenoxysulfonyl)phenyl]diazenyl]-, sodium salt (1:1) (CAS 70209-95-9) https://chemicalindependence.com/chemical/70209-95-9/ EPA TSCA Inventory: CAS 70209-95-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory