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C.I. Solvent Red 4

CAS 2653-64-7

2-Naphthalenol, 1-[2-(1-naphthalenyl)diazenyl]-

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

Molecular structure of 2653-64-7
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

CAS2653-64-7
PubChem CIDNot recorded
DTXSIDDTXSID3062576
FormulaC20H14N2O
Mol. Weight298.345 g/mol
SMILESOC1=CC=C2C=CC=CC2=C1N=NC1=CC=CC2=CC=CC=C12

Data Sources

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Brief citations

C.I. Solvent Red 4 (CAS 2653-64-7) https://chemicalindependence.com/chemical/2653-64-7/ EPA TSCA Inventory: CAS 2653-64-7. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory