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C.I. Acid Black 48

CAS 1328-24-1

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

Molecular structure of 1328-24-1
1 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

CAS1328-24-1
PubChem CIDNot recorded
DTXSIDDTXSID40927828
FormulaC28H18N3NaO7S
Mol. Weight563.52 g/mol
SMILES[Na+].OS([O-])=O.NC1=C2C(=O)C3=CC=CC=C3C(=O)C2=C(NC2=C3C(=O)C4=CC=CC=C4C(=O)C3=C(N)C=C2)C=C1

Data Sources

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Brief citations

C.I. Acid Black 48 (CAS 1328-24-1) https://chemicalindependence.com/chemical/1328-24-1/ EPA TSCA Inventory: CAS 1328-24-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory