phenol red

Term ID

CHEBI:31991

Synonyms

• 3,3-bis(p-hydroxyphenyl)-3H-2,1-benzoxathiole 1,1-dioxide
• 4,4'-(1,1-dioxido-3H-2,1-benzoxathiole-3,3-diyl)diphenol
• 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bisphenol S,S-dioxide
• alpha-hydroxy-alpha,alpha-bis(p-hydroxyphenyl)-o-toluenesulfonic acid gamma-sultone
• Phenol red
• Phenolsulfonphthalein
• PSP

Definition

3H-2,1-Benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 4-hydroxyphenyl groups. A pH indicator changing colour from yellow below pH 6.8 to bright pink above pH 8.2, it is commonly used as an indicator in cell cultures and in home swimming pool test kits. It is also used in the (now infrequently performed) phenolsulfonphthalein (PSP) test for estimation of overall blood flow through the kidney.

References

• Beilstein:326470
• CAS:143-74-8
• Drug_Central:3439
• KEGG:C12600
• KEGG:D01200

Ontology

ChEBI  ( EBI )

Resources

CTD