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2-Naphthalenesulfonic acid, 5-[2-[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]diazenyl]-8-[2-[6-sulfo-4-[2-(3-sulfophenyl)diazenyl]-1-naphthalenyl]diazenyl]-, sodium salt (1:4)

CAS 6428-60-0

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

Molecular structure of 6428-60-0
4 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

CAS6428-60-0
PubChem CIDNot recorded
DTXSIDDTXSID30889547
FormulaC42H25N7Na4O13S4
Mol. Weight1055.9 g/mol
SMILES[Na+].[Na+].[Na+].[Na+].OC1=C2C=CC(NC3=CC=CC=C3)=CC2=CC(=C1N=NC1=C2C=CC(=CC2=C(C=C1)N=NC1=CC=C(N=NC2=CC=CC(=C2)S([O-])(=O)=O)C2=CC(=CC=C12)S([O-])(=O)=O)S([O-])(=O)=O)S([O-])(=O)=O

Data Sources

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Brief citations

2-Naphthalenesulfonic acid, 5-[2-[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]diazenyl]-8-[2-[6-sulfo-4-[2-(3-sulfophenyl)diazenyl]-1-naphthalenyl]diazenyl]-, sodium salt (1:4) (CAS 6428-60-0) https://chemicalindependence.com/chemical/6428-60-0/ EPA TSCA Inventory: CAS 6428-60-0. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory