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

CAS 71550-28-2

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

Molecular structure of 71550-28-2
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

CAS71550-28-2
PubChem CIDNot recorded
DTXSIDDTXSID40887913
FormulaC21H15N2NaO9S2
Mol. Weight526.47 g/mol
SMILES[Na+].OC1=CC(=CC2=C1C=CC(NC(=O)NC1=CC3=C(C=C1)C(O)=CC(=C3)S([O-])(=O)=O)=C2)S(O)(=O)=O

Data Sources

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Brief citations

2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-, sodium salt (1:1) (CAS 71550-28-2) https://chemicalindependence.com/chemical/71550-28-2/ EPA TSCA Inventory: CAS 71550-28-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory