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114421

Sigma-Aldrich

Bromothymol Blue sodium salt

ACS reagent

Synonym(s):

3′,3′′-dibromothymolsulfonephthalein sodium salt

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About This Item

Empirical Formula (Hill Notation):
C27H27Br2NaO5S
CAS Number:
34722-90-2
Molecular Weight:
646.36
Beilstein/REAXYS Number:
6887926
EC Number:
252-169-7
MDL number:
MFCD00077263
UNSPSC Code:
12171500
PubChem Substance ID:
24847172
NACRES:
NA.47

grade

ACS reagent

Quality Level

200

form

crystalline powder
powder or crystals

technique(s)

titration: suitable

visual transition interval

6.0-7.6, yellow to blue

solubility

water: 0.1%, clear to very slightly hazy

λmax

392 nm
615 nm

ε (extinction coefficient)

≥35000 at 614-618 nm in 0.1 M NaOH at 0.005 g/L

application(s)

diagnostic assay manufacturing
hematology
histology

SMILES string

CC1=C(C=C(C(=C1Br)O)C(C)C)C(=C2C=C(C(=O)C(=C2C)Br)C(C)C)C3=CC=CC=C3S(=O)(=O)[O-].[Na+]
[Na+].CC(C)c1cc(c(C)c(Br)c1O)C(=C2\C=C(C(C)C)C(=O)C(Br)=C2C)\c3ccccc3S([O-])(=O)=O

InChI

InChI=1S/C27H28Br2O5S.Na/c1-13(2)18-11-20(15(5)24(28)26(18)30)23(17-9-7-8-10-22(17)35(32,33)34)21-12-19(14(3)4)27(31)25(29)16(21)6;/h7-14,30H,1-6H3,(H,32,33,34);/q;+1/p-1/b23-21+;
1S/C27H28Br2O5S.Na/c1-13(2)18-11-20(15(5)24(28)26(18)30)23(17-9-7-8-10-22(17)35(32,33)34)21-12-19(14(3)4)27(31)25(29)16(21)6;/h7-14,30H,1-6H3,(H,32,33,34);/q;+1/p-1/b23-21+;

InChI key

NMKFVGALBGZKGW-FKWCIMQXSA-M
NMKFVGALBGZKGW-FKWCIMQXSA-M

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Application

Bromothymol Blue has been used for freshwater pH measurements over a broad range of buffer intensities.

Biochem/physiol Actions

Bromothymol Blue is a pH-indicator. It is also used for carbonic anhydrase assay due to the conversion of carbon dioxide to bicarbonate.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Certificates of Analysis (COA)

Lot/Batch Number
SHBP1217
SHBN6096
SHBN4478
SHBM3640
MKCH8111

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Hydrophilic region of lecithin membranes studied by bromothymol blue and effects of an inhalation anesthetic, enflurane.
Mashimo T, et al.
Proceedings of the National Academy of Sciences of the USA, 76, 5114-5118 (1979)
Evaluation of indicator-based pH measurements for freshwater over a wide range of buffer intensities.
Yuan S and DeGrandpre MD
Environmental Science & Technology, 42, 6092-6099 (2008)
Biochemical properties of a new a-carbonic anhydrase from the human pathogenic bacterium, Vibrio cholerae.
Del Prete S, et al.
Journal of Enzyme Inhibition and Medicinal Chemistry, 29, 23-27 (2014)

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