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Thymolphthalein

SIAL/114553 - ACS reagent, Dye content 95 %

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

CAS Number: 125-20-2
Empirical Formula (Hill Notation): C28H30O4
Molecular Weight: 430.54
EC Number: 204-729-7
MDL Number: MFCD00005909
Linear Formula: C28H30O4
Product Type: Chemical
Catalog Number PKG Qty. Price Quantity
45-114553-10G 10 g
 $40.20
1/EA		 Add To Favorites
45-114553-50G 50 g
 $128.00
1/EA		 Add To Favorites

 

λmax 396 nm (2nd)
  592 nm
clarity of soln passes test
composition Dye content, 95%
form solid
grade ACS reagent
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
mp 251-253 °C (lit.)
Quality Level 200 
SMILES string CC(C)c1cc(c(C)cc1O)C2(OC(=O)c3ccccc23)c4cc(C(C)C)c(O)cc4C
technique(s) titration: suitable
visual transition interval 8.8-10.5, colorless to blue
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.
Packaging: 10, 50 g in poly bottle
RIDADR NONH for all modes of transport
WGK Germany WGK 3
Flash Point(F) Not applicable
Flash Point(C) Not applicable
mp 251-253 °C (lit.)
UNSPSC 12171500

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