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2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis[2-(4-aminophenyl)diazenyl]-5-hydroxy-

CAS 56405-32-4

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

Molecular structure of 56405-32-4
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

CAS56405-32-4
PubChem CIDNot recorded
DTXSIDDTXSID7069104
FormulaC22H19N7O7S2
Mol. Weight557.56 g/mol
SMILESNC1=CC=C(C=C1)N=NC1=C(O)C2=C(N)C(N=NC3=CC=C(N)C=C3)=C(C=C2C=C1S(O)(=O)=O)S(O)(=O)=O

Data Sources

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Brief citations

2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis[2-(4-aminophenyl)diazenyl]-5-hydroxy- (CAS 56405-32-4) https://chemicalindependence.com/chemical/56405-32-4/ EPA TSCA Inventory: CAS 56405-32-4. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory