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[1,1'-Biphenyl]-2,3'-disulfonic acid, 4'-[2-(1-hydroxy-4-sulfo-2-naphthalenyl)diazenyl]-5,5'-dimethyl-4-[2-[4-[(phenylsulfonyl)oxy]phenyl]diazenyl]-, sodium salt (1:3)

CAS 73385-00-9

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

Molecular structure of 73385-00-9
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

CAS73385-00-9
PubChem CIDNot recorded
DTXSIDDTXSID10890338
FormulaC36H25N4Na3O13S4
Mol. Weight918.82 g/mol
SMILES[Na+].[Na+].[Na+].CC1=C(C=C(C(=C1)C1=CC(C)=C(N=NC2=CC(=C3C=CC=CC3=C2O)S([O-])(=O)=O)C(=C1)S([O-])(=O)=O)S([O-])(=O)=O)N=NC1=CC=C(OS(=O)(=O)C2=CC=CC=C2)C=C1

Data Sources

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Brief citations

[1,1'-Biphenyl]-2,3'-disulfonic acid, 4'-[2-(1-hydroxy-4-sulfo-2-naphthalenyl)diazenyl]-5,5'-dimethyl-4-[2-[4-[(phenylsulfonyl)oxy]phenyl]diazenyl]-, sodium salt (1:3) (CAS 73385-00-9) https://chemicalindependence.com/chemical/73385-00-9/ EPA TSCA Inventory: CAS 73385-00-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory