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C.I. Mordant Black 13

CAS 1324-21-6

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

Molecular structure of 1324-21-6
2 Na⁺
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

CAS1324-21-6
PubChem CIDNot recorded
DTXSIDDTXSID5061669
FormulaC26H16N2Na2O9S2
Mol. Weight610.52 g/mol
SMILES[Na+].[Na+].OC1=C(NC2=CC=C(C=C2)S([O-])(=O)=O)C=C(NC2=CC=C(C=C2)S([O-])(=O)=O)C2=C1C(=O)C1=C(C=CC=C1)C2=O

Data Sources

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Brief citations

C.I. Mordant Black 13 (CAS 1324-21-6) https://chemicalindependence.com/chemical/1324-21-6/ EPA TSCA Inventory: CAS 1324-21-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory