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4-Hydroxy-2-(triphenylphosphaniumyl)phenolate

CAS 5405-63-0

Phosphonium, (2,5-dihydroxyphenyl)triphenyl-, inner salt

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

Molecular structure of 5405-63-0
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

CAS5405-63-0
PubChem CIDNot recorded
DTXSIDDTXSID70968880
FormulaC24H19O2P
Mol. Weight370.388 g/mol
SMILESOC1=CC(=C([O-])C=C1)[P+](C1=CC=CC=C1)(C1=CC=CC=C1)C1=CC=CC=C1

Data Sources

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Brief citations

4-Hydroxy-2-(triphenylphosphaniumyl)phenolate (CAS 5405-63-0) https://chemicalindependence.com/chemical/5405-63-0/ EPA TSCA Inventory: CAS 5405-63-0. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory