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319236 Sigma-Aldrich

Phenolphthalein solution

0.5 wt. % in ethanol: water (1:1)

  • CAS Number 77-09-8

  • Empirical Formula (Hill Notation) C20H14O4

  • Molecular Weight 318.32

  •  Beilstein/REAXYS Number 284423

  •  MDL number MFCD00005913

  •  PubChem Substance ID 24859151

  •  NACRES NA.47

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Properties

Related Categories Analytical Reagents, Analytical/Chromatography, Cell Biology, Hematology and Histology, Indicator Solutions,
Quality Level   200
form   liquid
concentration   0.5 wt. % in ethanol: water (1:1)
application(s)   hematology: suitable
  histology: suitable
visual transition interval   8.0 - 10, colorless to red
mp   -35 °C
density   0.918 g/mL at 25 °C
λmax   552 nm
Featured Industry   Diagnostic Assay Manufacturing
storage temp.   room temp
SMILES string   Oc1ccc(cc1)C2(OC(=O)c3ccccc23)c4ccc(O)cc4
InChI   1S/C20H14O4/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12,21-22H
InChI key   KJFMBFZCATUALV-UHFFFAOYSA-N

Description

General description

Phenolphthalein is an acid base indicator. It is a weak acid, which is colorless in acidic solution and turns puce pink in alkaline solution. Phenolphthalein is genotoxic. It might cause oxidative damage and binds to estrogen receptors.

Phenolphthalein solution is a synthetic indicator. It is colorless in acidic and neutral conditions. Phenolphthalein gives pink color when added to a base, therefore it is considered as a base indicator.

Application

Phenolphthalein solution has been used to measure total titratable acids by titration method.

Packaging

100 mL in glass bottle

Safety & Documentation

Safety Information

Symbol 
Signal word 
Warning
Hazard statements 
Precautionary statements 
RIDADR 
UN1170 - class 3 - PG 3 - Ethanol, solution
WGK Germany 
WGK 3
Flash Point(F) 
75.2 °F - closed cup - Not applicable
Flash Point(C) 
24 °C - closed cup - Not applicable

Documents

Certificate of Analysis (COA)

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Titrette from Brand
Protocols & Articles
Peer-Reviewed Papers
15

References

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