C.I. Direct Yellow 157
CAS 72705-24-9
7-Benzothiazolesulfonic acid, 2-[4-[2-[1-[[(2-methoxy-5-methyl-4-sulfophenyl)amino]carbonyl]-2-oxopropyl]diazenyl]phenyl]-6-methyl-, ammonium sodium salt (1:1:1)
EPA and Census publish no US supply data for this chemical.
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 unknownWhere 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
CAS72705-24-9
PubChem CIDNot recorded
DTXSIDDTXSID40890240
FormulaC26H26N5NaO9S3
Mol. Weight671.69 g/mol
SMILES[NH4+].[Na+].COC1=CC(=C(C)C=C1NC(=O)C(N=NC1=CC=C(C=C1)C1=NC2=CC=C(C)C(=C2S1)S([O-])(=O)=O)C(C)=O)S([O-])(=O)=O
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
C.I. Direct Yellow 157 (CAS 72705-24-9) https://chemicalindependence.com/chemical/72705-24-9/ EPA TSCA Inventory: CAS 72705-24-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory