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2-Naphthalenesulfonic acid, 1-amino-4-[2-(4-methyl-2-sulfophenyl)diazenyl]-, calcium salt (1:1)

CAS 65152-20-7

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

Molecular structure of 65152-20-7
1 Ca²⁺
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

CAS65152-20-7
PubChem CIDNot recorded
DTXSIDDTXSID2070269
FormulaC17H13CaN3O6S2
Mol. Weight459.5 g/mol
SMILES[Ca++].CC1=CC(=C(C=C1)N=NC1=C2C=CC=CC2=C(N)C(=C1)S([O-])(=O)=O)S([O-])(=O)=O

Data Sources

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Brief citations

2-Naphthalenesulfonic acid, 1-amino-4-[2-(4-methyl-2-sulfophenyl)diazenyl]-, calcium salt (1:1) (CAS 65152-20-7) https://chemicalindependence.com/chemical/65152-20-7/ EPA TSCA Inventory: CAS 65152-20-7. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory