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2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-3-[2-(2-methoxyphenyl)diazenyl]-, sodium salt (1:2)

CAS 72749-88-3

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

Molecular structure of 72749-88-3
2 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

CAS72749-88-3
PubChem CIDNot recorded
DTXSIDDTXSID90890250
FormulaC35H26N6Na2O11S2
Mol. Weight816.72 g/mol
SMILES[Na+].[Na+].COC1=CC=CC=C1N=NC1=C(C=C2C=C(NC(=O)NC3=CC4=CC(=C(N=NC5=CC=CC=C5OC)C(O)=C4C=C3)S([O-])(=O)=O)C=CC2=C1O)S([O-])(=O)=O

Data Sources

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Brief citations

2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-3-[2-(2-methoxyphenyl)diazenyl]-, sodium salt (1:2) (CAS 72749-88-3) https://chemicalindependence.com/chemical/72749-88-3/ EPA TSCA Inventory: CAS 72749-88-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory