Acid Blue S-G

CAS 68541-71-9

Chromate(2-), [4-(hydroxy-κO)-3-[2-[2-(hydroxy-κO)-4-nitrophenyl]diazenyl-κN1]-1-naphthalenesulfonato(3-)][1-[2-[2-(hydroxy-κO)-4-nitrophenyl]diazenyl-κN1]-2-naphthalenolato(2-)-κO]-, sodium (1:2)

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

Molecular structure of 68541-71-9 — 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

CAS68541-71-9

PubChem CIDNot recorded

DTXSIDDTXSID10904429

FormulaC32H17CrN6Na2O11S

Mol. Weight791.55 g/mol

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

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04

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Brief citations

Acid Blue S-G (CAS 68541-71-9) https://chemicalindependence.com/chemical/68541-71-9/ EPA TSCA Inventory: CAS 68541-71-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory