CHEBI:31991 - phenol red

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ChEBI Name phenol red
ChEBI ID CHEBI:31991
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.
Stars This entity has been manually annotated by the ChEBI Team.
Supplier Information ChemicalBook:CB7459063, eMolecules:729327, ZINC000001529372
Download Molfile XML SDF
Formula C19H14O5S
Net Charge 0
Average Mass 354.37600
Monoisotopic Mass 354.05619
InChI InChI=1S/C19H14O5S/c20-15-9-5-13(6-10-15)19(14-7-11-16(21)12-8-14)17-3-1-2-4-18(17)25(22,23)24-19/h1-12,20-21H
InChIKey BELBBZDIHDAJOR-UHFFFAOYSA-N
SMILES Oc1ccc(cc1)C1(OS(=O)(=O)c2ccccc12)c1ccc(O)cc1
Roles Classification
Application(s): two-colour indicator
A colour indicator that possesses a different colour on each side of the transition interval.
acid-base indicator
An acid or base which exhibits a colour change on neutralization by the basic or acidic titrant at or near the equivalence point of a titration.
diagnostic agent
A substance administered to aid diagnosis of a disease.
View more via ChEBI Ontology
ChEBI Ontology
Outgoing phenol red (CHEBI:31991) has role acid-base indicator (CHEBI:50407)
phenol red (CHEBI:31991) has role diagnostic agent (CHEBI:33295)
phenol red (CHEBI:31991) has role two-colour indicator (CHEBI:50412)
phenol red (CHEBI:31991) is a 2,1-benzoxathiole (CHEBI:38087)
phenol red (CHEBI:31991) is a arenesulfonate ester (CHEBI:38094)
phenol red (CHEBI:31991) is a phenols (CHEBI:33853)
phenol red (CHEBI:31991) is a sultone (CHEBI:38088)
IUPAC Name
4,4'-(1,1-dioxido-3H-2,1-benzoxathiole-3,3-diyl)diphenol
Synonyms Sources
3,3-bis(p-hydroxyphenyl)-3H-2,1-benzoxathiole 1,1-dioxide ChEBI
4,4'-(3H-2,1-benzoxathiol-3-ylidene)bisphenol S,S-dioxide ChemIDplus
α-hydroxy-α,α-bis(p-hydroxyphenyl)-o-toluenesulfonic acid γ-sultone ChEBI
Phenol red KEGG COMPOUND
Phenolsulfonphthalein KEGG COMPOUND
PSP ChemIDplus
Manual Xrefs Databases
3439 DrugCentral
C12600 KEGG COMPOUND
D01200 KEGG DRUG
View more database links
Registry Numbers Types Sources
143-74-8 CAS Registry Number KEGG COMPOUND
143-74-8 CAS Registry Number ChemIDplus
326470 Beilstein Registry Number Beilstein
Last Modified
22 February 2017