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Benzenesulfonic acid, 4-chloro-2-[2-[2-hydroxy-3-[[(2-methoxyphenyl)amino]carbonyl]-1-naphthalenyl]diazenyl]-5-methyl-, sodium salt (1:1)

CAS 73263-37-3

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

Molecular structure of 73263-37-3
1 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

CAS73263-37-3
PubChem CIDNot recorded
DTXSIDDTXSID30888378
FormulaC25H19ClN3NaO6S
Mol. Weight547.94 g/mol
SMILES[Na+].COC1=CC=CC=C1NC(=O)C1=CC2=C(C=CC=C2)C(N=NC2=CC(Cl)=C(C)C=C2S([O-])(=O)=O)=C1O

Data Sources

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Brief citations

Benzenesulfonic acid, 4-chloro-2-[2-[2-hydroxy-3-[[(2-methoxyphenyl)amino]carbonyl]-1-naphthalenyl]diazenyl]-5-methyl-, sodium salt (1:1) (CAS 73263-37-3) https://chemicalindependence.com/chemical/73263-37-3/ EPA TSCA Inventory: CAS 73263-37-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory