T0763
Thymol Blue sodium salt
≥98%
Synonym(s):
Thymolsulfonphthalein sodium salt
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About This Item
Empirical Formula (Hill Notation):
C27H29NaO5S
CAS Number:
Molecular Weight:
488.57
EC Number:
263-650-6
UNSPSC Code:
12352200
PubChem Substance ID:
Beilstein/REAXYS Number:
3861515
MDL number:
assay
≥98%
mp
283-285 °C (dec.) (lit.)
solubility
95% ethanol: 10 mg/mL, clear, dark green
SMILES string
[Na+].CC(C)c1cc(c(C)cc1O)C2(OS(=O)(=O)c3ccccc23)c4cc(C(C)C)c([O-])cc4C
InChI
1S/C27H30O5S.Na/c1-15(2)19-13-22(17(5)11-24(19)28)27(21-9-7-8-10-26(21)33(30,31)32-27)23-14-20(16(3)4)25(29)12-18(23)6;/h7-16,28-29H,1-6H3;/q;+1/p-1
InChI key
BAVBEHWEOJMHDS-UHFFFAOYSA-M
General description
Thymol Blue is a pH indicator with visual transition intervals of pH 1.2 (red) to pH 2.8 (yellow), and pH 8.0 (yellow) to pH 9.2 (blue).
Application
Thymol Blue sodium salt was used to indicate the changes in pH to reflect ionization in multi-component drug formulations.
Storage Class
13 - Non Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
Regulatory Information
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Ramprakash Govindarajan et al.
Pharmaceutical research, 23(10), 2454-2468 (2006-08-26)
Evaluation of the effect of formulation composition and processing variables on the microenvironment in solid dosage forms, based on ionization of indicator probes. Sulfonephthalein indicators were intimately mixed with individual excipients, binary excipient mixtures or multi-component blends by the solvent
Douglas R Macfarlane et al.
Chemical communications (Cambridge, England), 46(41), 7703-7705 (2010-09-28)
We describe hydrated ionic liquids which have an intrinsic proton buffering action and hence an ability to control proton activity in an ionic medium.
S Passamonti et al.
Biochimica et biophysica acta, 943(2), 119-125 (1988-08-18)
Sulfobromophthalein electrogenic uptake into rat liver plasma membrane vesicles was shown to admit only the quinoid, trivalent anion. The minimum requirement for this electrogenic process has been investigated in rat liver plasma membrane vesicles by using Thymol blue, a pH-indicator