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1,3,5-Naphthalenetrisulfonic acid, 7-[2-[4-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]-5-sulfo-1-naphthalenyl]diazenyl]-, sodium salt (1:4)

CAS 72639-29-3

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

Molecular structure of 72639-29-3
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

CAS72639-29-3
PubChem CIDNot recorded
DTXSIDDTXSID50890231
FormulaC29H13Cl2N5Na4O13S4
Mol. Weight930.54 g/mol
SMILES[Na+].[Na+].[Na+].[Na+].[O-]S(=O)(=O)C1=CC(=C2C=C(C=C(C2=C1)S([O-])(=O)=O)N=NC1=C2C=CC=C(C2=C(NC(=O)C2=CC3=NC(Cl)=C(Cl)N=C3C=C2)C=C1)S([O-])(=O)=O)S([O-])(=O)=O

Data Sources

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Brief citations

1,3,5-Naphthalenetrisulfonic acid, 7-[2-[4-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]-5-sulfo-1-naphthalenyl]diazenyl]-, sodium salt (1:4) (CAS 72639-29-3) https://chemicalindependence.com/chemical/72639-29-3/ EPA TSCA Inventory: CAS 72639-29-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory