EINECS 277-369-1
CAS 73297-21-9
Iron, [μ-[[3,3'-[methylenebis[[4-hydroxy-6-(hydroxy-κO)-3,1-phenylene]-2,1-diazenediyl-κN1]]bis[4-(hydroxy-κO)-5-nitrobenzenesulfonato]](6-)]]di-, hydrochloride (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
CAS73297-21-9
PubChem CIDNot recorded
DTXSIDDTXSID801015288
FormulaC25H14Cl2Fe2N6O16S2
Mol. Weight901.12 g/mol
SMILES[Fe+3].[Fe+3].Cl[H].Cl[H].OC1=C(CC2=C(O)C=C([O-])C(=C2)\N=N\C2=CC(=CC(=C2[O-])[N+]([O-])=O)S([O-])(=O)=O)C=C(\N=N\C2=CC(=CC(=C2[O-])[N+]([O-])=O)S([O-])(=O)=O)C([O-])=C1
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
EINECS 277-369-1 (CAS 73297-21-9) https://chemicalindependence.com/chemical/73297-21-9/ EPA TSCA Inventory: CAS 73297-21-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory