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Substance Name: Phenolphthalein sodium
RN: 518-51-4
UNII: PV0O2930VH
InChIKey: HAWFSFZXNWBZRU-UHFFFAOYSA-L

Note

  • An acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic.

Molecular Formula

  • C20-H14-O4.2Na

Molecular Weight

  • 362.2908
 
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Names and Synonyms

Name of Substance

  • Phenolphthalein sodium

Synonyms

  • EINECS 208-254-6
  • UNII-PV0O2930VH

Systematic Names

  • 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-, disodium salt
  • 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-, sodium salt (1:2)
  • Phenolphthalein sodium

Registry Numbers

CAS Registry Number

  • 518-51-4

FDA UNII

  • PV0O2930VH

Other Registry Numbers

  • 1189449-21-5
  • 52404-53-2

System Generated Number

  • 0000518514

Molecular Formulas

Molecular Formula

  • C20-H14-O4.2Na

Molecular Formula Fragments

  • C20-H14-O4
  • COMPONENT
  • Na

Structure Descriptors

InChI

1S/C20H14O4.2Na/c21-15-9-5-13(6-10-15)19(14-7-11-16(22)12-8-14)17-3-1-2-4-18(17)20(23)24;;/h1-12,21H,(H,23,24);;/q;2*+1/p-2

InChIKey

HAWFSFZXNWBZRU-UHFFFAOYSA-L

Smiles

c1ccc(c(c1)C(=C2C=CC(=O)C=C2)c3ccc(cc3)[O-])C(=O)[O-].[Na+].[Na+]

Physical Properties

Physical Property Value Units Temp (deg C) Source
log P (octanol-water) -0.960 (none)   EST
Atmospheric OH Rate Constant 5.55E-11 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.