C.I. Acid Brown 289

CAS 52587-68-5

Chromate(2-), [3-[2-[4,5-dihydro-3-methyl-5-(oxo-κO)-1-phenyl-1H-pyrazol-4-yl]diazenyl-κN]-4-(hydroxy-κO)benzenesulfonato(3-)][1-[2-[2-(hydroxy-κO)-5-(2-phenyldiazenyl)phenyl]diazenyl-κN1]-2-naphthalenolato(2-)-κO]-, sodium (1:2)

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

Molecular structure of 52587-68-5 — 2 Na⁺ · 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

CAS52587-68-5

PubChem CIDNot recorded

DTXSIDDTXSID30904385

FormulaC38H25CrN8Na2O7S

Mol. Weight835.7 g/mol

SMILES[Na+].[Na+].[Cr+3].CC1=NN(C(=O)[C-]1N=NC1=CC(=CC=C1[O-])S([O-])(=O)=O)C1=CC=CC=C1.[O-]C1=CC=C2C=CC=CC2=C1N=NC1=C([O-])C=CC(=C1)\N=N\C1=CC=CC=C1

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04

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Brief citations

C.I. Acid Brown 289 (CAS 52587-68-5) https://chemicalindependence.com/chemical/52587-68-5/ EPA TSCA Inventory: CAS 52587-68-5. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory