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Merck
CN

114774

3′,3′′,5′,5′′-Tetrabromophenolphthalein ethyl ester potassium salt

indicator grade

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About This Item

Empirical Formula (Hill Notation):
C22H13Br4KO4
CAS Number:
62637-91-6
Molecular Weight:
700.05
EC Number:
263-661-6
UNSPSC Code:
12171500
PubChem Substance ID:
24847193
Beilstein/REAXYS Number:
3848263
MDL number:
MFCD00011662

Key Documents

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Product Name

3′,3′′,5′,5′′-Tetrabromophenolphthalein ethyl ester potassium salt, indicator grade

InChI key

WCIQBKUTYDIBJC-UHFFFAOYSA-M

InChI

1S/C22H14Br4O4.K/c1-2-30-22(29)14-6-4-3-5-13(14)19(11-7-15(23)20(27)16(24)8-11)12-9-17(25)21(28)18(26)10-12;/h3-10,27H,2H2,1H3;/q;+1/p-1

SMILES string

[K+].CCOC(=O)c1ccccc1\C(c2cc(Br)c([O-])c(Br)c2)=C3\C=C(Br)C(=O)C(Br)=C3

grade

indicator grade

visual transition interval

3.0-3.5, yellow to green
4.2-4.9, blue-green to blue-violet

mp

210 °C (dec.) (lit.)

λmax

386 nm (2nd)
593 nm

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Biochem/physiol Actions

3′,3′′,5′,5′′-Tetrabromophenolphthalein ethyl ester is used in the spectrophotometric method of total protein determination.

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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Certificates of Analysis (COA)

Lot/Batch Number
0000060755
0000060749
0000049804
0000059832
0000043004

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Spectrophotometric determination of total proteins in blood plasma: a comparative study among dye-binding methods.
Zaia DAM, et al.
Brazilian Archives of Biology and Technology, 48, 385-388 (2005)
J G Rio et al.
Journal of analytical toxicology, 5(6), 267-269 (1981-11-01)
A simple direct colorimetric test using a tetrabromophenolphthalein reagent for detecting basic drugs in urine is described. The response of 62 commonly encountered drugs and metabolites to this test are described and 39 of these compounds were found to react.
Ion association titration for the determination of local anesthetics in pharmaceuticals with tetrabromophenolphthalein ethyl ester as an indicator.
T Sakai et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 17(9), 1105-1107 (2001-11-16)
D L Mount et al.
Bulletin of the World Health Organization, 67(3), 295-300 (1989-01-01)
Two field-adapted colorimetric methods for measuring the antimalarial drug chloroquine in urine are described. Both are modifications of the method of Saker and Solomons for screening urine for phencyclidine and other drugs of abuse, using the colour reagent tetrabromophenolphthalein ethyl
[Application of tetrabromophenolphthalein ethyl ester (TBPE) indicator-dye to pharmaco-analysis].
G Szász et al.
Acta pharmaceutica Hungarica, 51(1), 43-47 (1981-01-01)
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