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C.I. Acid Black 123

CAS 32517-36-5

Chromate(1-), bis[1-[2-[2-(hydroxy-κO)-4-nitrophenyl]diazenyl-κN1]-2-naphthalenolato(2-)-κO]-, hydrogen (1:1), (OC-6-22')-

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

Molecular structure of 32517-36-5
1 Cr³⁻ · 1 H⁺
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

CAS32517-36-5
PubChem CIDNot recorded
DTXSIDDTXSID901014895
FormulaC32H19CrN6O8
Mol. Weight667.537 g/mol
SMILES[H+].[Cr-3].[O-]C1=CC=C2C=CC=CC2=C1\N=N\C1=CC=C(C=C1[O-])[N+]([O-])=O.[O-]C1=CC=C2C=CC=CC2=C1\N=N\C1=CC=C(C=C1[O-])[N+]([O-])=O

Data Sources

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Brief citations

C.I. Acid Black 123 (CAS 32517-36-5) https://chemicalindependence.com/chemical/32517-36-5/ EPA TSCA Inventory: CAS 32517-36-5. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory