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C.I. Acid Red 151 monolithium salt

CAS 51988-26-2

Benzenesulfonic acid, 4-[2-[4-[2-(2-hydroxy-1-naphthalenyl)diazenyl]phenyl]diazenyl]-, lithium salt (1:1)

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

Molecular structure of 51988-26-2
1 Li⁺
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

CAS51988-26-2
PubChem CIDNot recorded
DTXSIDDTXSID00885430
FormulaC22H15LiN4O4S
Mol. Weight438.39 g/mol
SMILES[Li+].OC1=C(N=NC2=CC=C(C=C2)N=NC2=CC=C(C=C2)S([O-])(=O)=O)C2=C(C=CC=C2)C=C1

Data Sources

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Brief citations

C.I. Acid Red 151 monolithium salt (CAS 51988-26-2) https://chemicalindependence.com/chemical/51988-26-2/ EPA TSCA Inventory: CAS 51988-26-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory