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89360 Sigma-Aldrich

Thymolphthalein

ACS reagent, indicator (pH 8.8-10.5)

Synonym: 5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein

  • CAS Number 125-20-2

  • Empirical Formula (Hill Notation) C28H30O4

  • Molecular Weight 430.54

  •  Beilstein Registry Number 359413

  •  EC Number 204-729-7

  •  MDL number MFCD00005909

  •  PubChem Substance ID 329769727

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Properties

Related Categories Analytical Reagents, Analytical/Chromatography, Indicators, Titration, pH Indicators - Solids More...
grade   ACS reagent
  indicator (pH 8.8-10.5)
InChI Key   LDKDGDIWEUUXSH-UHFFFAOYSA-N
ign. residue   ≤1%
mp   248-254 °C
  251-253 °C (lit.)

Description

Application

Thymolphthalein was suitable as indicator during titration of hyamine hydroxide.

General description

Thymolphthalien is an acid-base indicator which is colourless in acidic form and deep blue in basic form. Acidic form retains hydrogen on each hydroxyl group. It is suitable in preparing disappearing ink.

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3

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Protocols & Articles
Peer-Reviewed Papers
15

References

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