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2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, sodium salt (1:2)

CAS 3963-80-2

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

Molecular structure of 3963-80-2
2 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

CAS3963-80-2
PubChem CIDNot recorded
DTXSIDDTXSID9063247
FormulaC10H7NNa2O7S2
Mol. Weight363.27 g/mol
SMILES[Na+].[Na+].NC1=C2C(O)=CC(=CC2=CC(=C1)S([O-])(=O)=O)S([O-])(=O)=O

Data Sources

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Brief citations

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, sodium salt (1:2) (CAS 3963-80-2) https://chemicalindependence.com/chemical/3963-80-2/ EPA TSCA Inventory: CAS 3963-80-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory