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1-Naphthalenesulfonic acid, 3-diazo-3,4-dihydro-4-oxo-, ar'-(1-methylethyl)[1,1'-biphenyl]-4-yl ester

CAS 52125-43-6

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

Molecular structure of 52125-43-6
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

CAS52125-43-6
PubChem CIDNot recorded
DTXSIDDTXSID8068707
FormulaC25H20N2O4S
Mol. Weight444.51 g/mol
SMILESCC(C)C1=CC=C(C=C1)C1=CC=C(OS(=O)(=O)C2=CC(=[N+]=[N-])C(=O)C3=C2C=CC=C3)C=C1

Data Sources

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Brief citations

1-Naphthalenesulfonic acid, 3-diazo-3,4-dihydro-4-oxo-, ar'-(1-methylethyl)[1,1'-biphenyl]-4-yl ester (CAS 52125-43-6) https://chemicalindependence.com/chemical/52125-43-6/ EPA TSCA Inventory: CAS 52125-43-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory