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2,7-Naphthalenedisulfonic acid, 4-amino-3-[2-[4-[[[4-[2-(2,4-diaminophenyl)diazenyl]phenyl]amino]carbonyl]phenyl]diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-, sodium salt (1:2)

CAS 57131-19-8

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

Molecular structure of 57131-19-8
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

CAS57131-19-8
PubChem CIDNot recorded
DTXSIDDTXSID20889773
FormulaC35H26N10Na2O8S2
Mol. Weight824.75 g/mol
SMILES[Na+].[Na+].NC1=CC(N)=C(C=C1)N=NC1=CC=C(NC(=O)C2=CC=C(C=C2)N=NC2=C(N)C3=C(O)C(N=NC4=CC=CC=C4)=C(C=C3C=C2S([O-])(=O)=O)S([O-])(=O)=O)C=C1

Data Sources

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Brief citations

2,7-Naphthalenedisulfonic acid, 4-amino-3-[2-[4-[[[4-[2-(2,4-diaminophenyl)diazenyl]phenyl]amino]carbonyl]phenyl]diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-, sodium salt (1:2) (CAS 57131-19-8) https://chemicalindependence.com/chemical/57131-19-8/ EPA TSCA Inventory: CAS 57131-19-8. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory