phenol red
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.
Exact Synonyms
4,4'-(1,1-dioxido-3H-2,1-benzoxathiole-3,3-diyl)diphenol
Phenol red
Related Synonyms
3,3-bis(p-hydroxyphenyl)-3H-2,1-benzoxathiole 1,1-dioxide
4,4'-(3H-2,1-benzoxathiol-3-ylidene)bisphenol S,S-dioxide
alpha-hydroxy-alpha,alpha-bis(p-hydroxyphenyl)-o-toluenesulfonic acid gamma-sultone
Phenolsulfonphthalein
PSP
class Information
charge
0
formula
C19H14O5S
has_dbxref
- Beilstein:326470
- CAS:143-74-8
- Drug_Central:3439
- KEGG:C12600
- KEGG:D01200
has_obo_namespace
chebi_ontology
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
in_subset
mass
354.37600
monoisotopicmass
354.05619
smiles
Oc1ccc(cc1)C1(OS(=O)(=O)c2ccccc12)c1ccc(O)cc1