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Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[2-(2-hydroxy-5-methylphenyl)diazenyl]-, potassium salt (1:4)

CAS 196521-82-1

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

Molecular structure of 196521-82-1
4 K⁺
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

CAS196521-82-1
PubChem CIDNot recorded
DTXSIDDTXSID80890481
FormulaC28H20K4N4O8S2
Mol. Weight761 g/mol
SMILES[K+].[K+].[K+].[K+].CC1=CC=C([O-])C(=C1)N=NC1=CC(=C(C=CC2=C(C=C(C=C2)N=NC2=CC(C)=CC=C2[O-])S([O-])(=O)=O)C=C1)S([O-])(=O)=O

Data Sources

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Brief citations

Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-[2-(2-hydroxy-5-methylphenyl)diazenyl]-, potassium salt (1:4) (CAS 196521-82-1) https://chemicalindependence.com/chemical/196521-82-1/ EPA TSCA Inventory: CAS 196521-82-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory