Flag of the United StatesAmerican Chemical Independence

Direct Red 12B

CAS 5001-72-9

2-Naphthalenesulfonic acid, 7,7'-iminobis[4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2)

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

Molecular structure of 5001-72-9
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

CAS5001-72-9
PubChem CIDNot recorded
DTXSIDDTXSID10889484
FormulaC32H21N5Na2O8S2
Mol. Weight713.65 g/mol
SMILES[Na+].[Na+].OC1=C(N=NC2=CC=CC=C2)C(=CC2=CC(NC3=CC4=C(C=C3)C(O)=C(N=NC3=CC=CC=C3)C(=C4)S([O-])(=O)=O)=CC=C12)S([O-])(=O)=O

Data Sources

← Back to Dashboard

Brief citations

Direct Red 12B (CAS 5001-72-9) https://chemicalindependence.com/chemical/5001-72-9/ EPA TSCA Inventory: CAS 5001-72-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory