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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:
62625-21-2
Molecular Weight:
488.57
EC Number:
263-650-6
UNSPSC Code:
12352200
PubChem Substance ID:
24899910
Beilstein/REAXYS Number:
3861515
MDL number:
MFCD00151093
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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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Certificates of Analysis (COA)

Lot/Batch Number
068K3724
028K3722
083K3682
077F3734
053K3681

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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
P Balderas-Hernández et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 66(1), 68-73 (2006-07-11)
This paper presents the results concerning the determination of the formation constants of the complexes between thymol blue, TB, and the metal ions Pb(II) or Cd(II). The experimental procedure was carried out in the presence of a nitrogen atmosphere at
Kanakapura Basavaiah et al.
Anais da Academia Brasileira de Ciencias, 80(2), 253-262 (2008-05-29)
Four sensitive and rapid methods for the determination of stavudine (STV) in bulk drug and in dosage forms were developed and optimized. In titrimetry, aqueous solution of STV was treated with a known excess of bromate-bromide in HCl medium followed
Shangjie Xu et al.
Macromolecular bioscience, 7(8), 968-974 (2007-08-01)
A simple general synthetic concept to build dendritic core-shell architectures with pH-labile linkers based on hyperbranched PEI cores and biocompatible PEG shells is presented. Using these dendritic core-shell architectures as nanocarriers, the encapsulation and transport of polar dyes of different
N Gayathri et al.
Journal of AOAC International, 84(4), 1065-1069 (2001-08-15)
A simple and sensitive spectrophotometric method was developed for the determination of trace amounts of sulfur dioxide. The method is based on the reaction of SO2 with a known excess of ICI as the oxidant. The unreacted ICI iodinates thymol
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