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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 24889214

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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.)
absorption   391-401 nm, 0.1 M in NaOH (UV 2)
  587-597 nm (uv 1)

Description

Other Notes

Same product — same quality — now Sigma-Aldrich brand

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.

Price and Availability

Suggested Laboratory Gloves


Laboratory GlovesThis substance has been tested against several types of hand protection for CE compliance. Click below to find the recommended gloves for handling this product.



Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3
Protocols & Articles
Peer-Reviewed Papers
15

References

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