Synonym:
5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein
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CAS Number 125-20-2
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Empirical Formula (Hill Notation) C28H30O4
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Molecular Weight 430.54
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Beilstein Registry Number 359413
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EC Number 204-729-7
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MDL number MFCD00005909
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PubChem Substance ID 24847182
Properties:
Related Categories |
Analytical Reagents,
Analytical/Chromatography,
Cell Biology,
Hematology and Histology,
Indicators,
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grade
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ACS reagent
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InChI Key
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LDKDGDIWEUUXSH-UHFFFAOYSA-N
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composition
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Dye content, 95%
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clarity of soln
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passes test
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visual transition interval
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8.8 - 10.5, colorless to blue
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mp
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251-253 °C(lit.)
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absorption
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λmax 396 nm (2nd)
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λmax 592 nm
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Description:
Packaging
10, 50 g in poly bottle
Application
Thymolphthalein has been used as a pH indicator in [14C] urea breath test to determine when the CO2 trap is full.
General description
Thymolphthalein (5′, 5′′-Diisopropyl-2′, 2′′-dimethylphenolphthalein) is an acid-base indicator which is colorless in solutions with a pH below 8.5 and blue in solutions with a pH above 9.5. Thymolphthalein has been used as an indicator in periodate-thiosulfate reaction.
Safety:
Personal Protective Equipment
Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
RIDADR
NONH for all modes of transport