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Dihydrogen (2-hydroxy-3-((2-hydroxy-1-naphthyl)azo)-5-nitrobenzene-1-sulphonato(3-))(1-((2-hydroxy-4-nitrophenyl)azo)-2-naphtholato(2-))chromate(2-)

CAS 73003-98-2

Chromate(2-), [2-(hydroxy-κO)-3-[2-[2-(hydroxy-κO)-1-naphthalenyl]diazenyl-κN1]-5-nitrobenzenesulfonato(3-)][1-[2-[2-(hydroxy-κO)-4-nitrophenyl]diazenyl-κN1]-2-naphthalenolato(2-)-κO]-, hydrogen (1:2)

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

Molecular structure of 73003-98-2
1 Cr³⁺
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

CAS73003-98-2
PubChem CIDNot recorded
DTXSIDDTXSID90904881
FormulaC32H17CrN6O11S
Mol. Weight745.58 g/mol
SMILES[Cr+3].[O-]C1=C(\N=N\C2=C([O-])C=C(C=C2)[N+]([O-])=O)C2=CC=CC=C2C=C1.[O-]C1=C(\N=N\C2=CC(=CC(=C2[O-])S([O-])(=O)=O)[N+]([O-])=O)C2=C(C=CC=C2)C=C1

Data Sources

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Brief citations

Dihydrogen (2-hydroxy-3-((2-hydroxy-1-naphthyl)azo)-5-nitrobenzene-1-sulphonato(3-))(1-((2-hydroxy-4-nitrophenyl)azo)-2-naphtholato(2-))chromate(2-) (CAS 73003-98-2) https://chemicalindependence.com/chemical/73003-98-2/ EPA TSCA Inventory: CAS 73003-98-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory