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1,3,6-Naphthalenetrisulfonic acid, 7-[2-[4-(acetylamino)phenyl]diazenyl]-8-hydroxy-, sodium salt (1:3)

CAS 74499-56-2

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

Molecular structure of 74499-56-2
3 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

CAS74499-56-2
PubChem CIDNot recorded
DTXSIDDTXSID20890349
FormulaC18H12N3Na3O11S3
Mol. Weight611.45 g/mol
SMILES[Na+].[Na+].[Na+].CC(=O)NC1=CC=C(C=C1)N=NC1=C(O)C2=C(C=C(C=C2C=C1S([O-])(=O)=O)S([O-])(=O)=O)S([O-])(=O)=O

Data Sources

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Brief citations

1,3,6-Naphthalenetrisulfonic acid, 7-[2-[4-(acetylamino)phenyl]diazenyl]-8-hydroxy-, sodium salt (1:3) (CAS 74499-56-2) https://chemicalindependence.com/chemical/74499-56-2/ EPA TSCA Inventory: CAS 74499-56-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory