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2-Naphthalenecarboxylic acid, 3-hydroxy-4-[2-(4-methyl-2-sulfophenyl)diazenyl]-, calcium strontium salt (2:1:1)

CAS 55491-44-6

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

Molecular structure of 55491-44-6
1 Ca²⁺ · 1 Sr²⁺
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

CAS55491-44-6
PubChem CIDNot recorded
DTXSIDDTXSID7069027
FormulaC36H24CaN4O12S2Sr
Mol. Weight896.42 g/mol
SMILES[Ca++].[Sr++].CC1=CC(=C(C=C1)N=NC1=C2C=CC=CC2=CC(C([O-])=O)=C1O)S([O-])(=O)=O.CC1=CC=C(N=NC2=C3C=CC=CC3=CC(C([O-])=O)=C2O)C(=C1)S([O-])(=O)=O

Data Sources

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Brief citations

2-Naphthalenecarboxylic acid, 3-hydroxy-4-[2-(4-methyl-2-sulfophenyl)diazenyl]-, calcium strontium salt (2:1:1) (CAS 55491-44-6) https://chemicalindependence.com/chemical/55491-44-6/ EPA TSCA Inventory: CAS 55491-44-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory