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2,7-Naphthalenedisulfonic acid, 4-[2-(4-amino-5-methoxy-2-methylphenyl)diazenyl]-5-[(phenylsulfonyl)oxy]-, sodium salt (1:2)

CAS 77847-22-4

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

Molecular structure of 77847-22-4
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

CAS77847-22-4
PubChem CIDNot recorded
DTXSIDDTXSID20890389
FormulaC24H19N3Na2O10S3
Mol. Weight651.59 g/mol
SMILES[Na+].[Na+].COC1=C(N)C=C(C)C(=C1)N=NC1=C2C(OS(=O)(=O)C3=CC=CC=C3)=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-[2-(4-amino-5-methoxy-2-methylphenyl)diazenyl]-5-[(phenylsulfonyl)oxy]-, sodium salt (1:2) (CAS 77847-22-4) https://chemicalindependence.com/chemical/77847-22-4/ EPA TSCA Inventory: CAS 77847-22-4. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory