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2,7-Naphthalenedisulfonic acid, 4-amino-6-[2-[4-[[[4-[2-(2,4-dihydroxyphenyl)diazenyl]phenyl]amino]sulfonyl]phenyl]diazenyl]-5-hydroxy-3-[2-(4-nitrophenyl)diazenyl]-

CAS 73309-49-6

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

Molecular structure of 73309-49-6
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

CAS73309-49-6
PubChem CIDNot recorded
DTXSIDDTXSID8072742
FormulaC34H25N9O13S3
Mol. Weight863.8 g/mol
SMILESNC1=C2C(O)=C(N=NC3=CC=C(C=C3)S(=O)(=O)NC3=CC=C(C=C3)N=NC3=C(O)C=C(O)C=C3)C(=CC2=CC(=C1N=NC1=CC=C(C=C1)[N+]([O-])=O)S(O)(=O)=O)S(O)(=O)=O

Data Sources

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Brief citations

2,7-Naphthalenedisulfonic acid, 4-amino-6-[2-[4-[[[4-[2-(2,4-dihydroxyphenyl)diazenyl]phenyl]amino]sulfonyl]phenyl]diazenyl]-5-hydroxy-3-[2-(4-nitrophenyl)diazenyl]- (CAS 73309-49-6) https://chemicalindependence.com/chemical/73309-49-6/ EPA TSCA Inventory: CAS 73309-49-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory