C.I. Reactive Yellow 39
CAS 70247-70-0
Benzenesulfonic acid, 4-[4-[2-[5-[(2-bromo-1-oxo-2-propen-1-yl)amino]-2-sulfophenyl]diazenyl]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-2,5-dichloro-, sodium salt (1:2)
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
CAS70247-70-0
PubChem CIDNot recorded
DTXSIDDTXSID10890075
FormulaC19H12BrCl2N5Na2O8S2
Mol. Weight699.24 g/mol
SMILES[Na+].[Na+].CC1=NN(C(=O)C1N=NC1=CC(NC(=O)C(Br)=C)=CC=C1S([O-])(=O)=O)C1=C(Cl)C=C(C(Cl)=C1)S([O-])(=O)=O
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
C.I. Reactive Yellow 39 (CAS 70247-70-0) https://chemicalindependence.com/chemical/70247-70-0/ EPA TSCA Inventory: CAS 70247-70-0. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory