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Phenolsulfonphthalein

CHEBI: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.

Chemical Information

Molecular Formula
C19H14O5S
Molecular Mass
354.37600
Charge
0
SMILES
Oc1ccc(cc1)C1(OS(=O)(=O)c2ccccc12)c1ccc(O)cc1
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

Alternative Names

  • 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

Drug Classification

Important Medical Information

⚕️ This information is sourced from ChEBI (Chemical Entities of Biological Interest) database and is intended for educational purposes only.

  • Always consult with a healthcare professional before starting, stopping, or modifying any medication.
  • Side effects may vary and this list may not be comprehensive.
  • Drug interactions may occur with other medications.

Additional Identifiers

DRON_00010000
8141
oboInOwl#hasDbXref
KEGG:D01200
core#notation
CHEBI:31991

Additional References

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Additional Attributes

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chebi_ontology
DRON_00010000
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oboInOwl#hasDbXref
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oboInOwl#id
CHEBI:31991
core#notation
CHEBI:31991
RO_0000087
http://purl.obolibrary.org/obo/CHEBI_50407
oboInOwl#inSubset
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http://www.w3.org/2002/07/owl#Class