114553
Thymolphthalein
ACS reagent, Dye content 95 %
Synonym(s):
5′,5′′-Diisopropyl-2′,2′′-dimethylphenolphthalein
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About This Item
Empirical Formula (Hill Notation):
C28H30O4
CAS Number:
Molecular Weight:
430.54
UNSPSC Code:
12171500
NACRES:
NA.47
PubChem Substance ID:
EC Number:
204-729-7
Beilstein/REAXYS Number:
359413
MDL number:
grade
ACS reagent
Quality Level
form
solid
composition
Dye content, 95%
clarity of soln
passes test
technique(s)
titration: suitable
visual transition interval
8.8-10.5, colorless to blue
mp
251-253 °C (lit.)
λmax
396 nm (2nd), 592 nm
SMILES string
CC(C)c1cc(c(C)cc1O)C2(OC(=O)c3ccccc23)c4cc(C(C)C)c(O)cc4C
InChI
1S/C28H30O4/c1-15(2)20-13-23(17(5)11-25(20)29)28(22-10-8-7-9-19(22)27(31)32-28)24-14-21(16(3)4)26(30)12-18(24)6/h7-16,29-30H,1-6H3
InChI key
LDKDGDIWEUUXSH-UHFFFAOYSA-N
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.
Application
Thymolphthalein has been used as a pH indicator in [14C] urea breath test to determine when the CO2 trap is full.
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Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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