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114774

Sigma-Aldrich

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
Beilstein:
3848263
EC Number:
263-661-6
MDL number:
MFCD00011662
UNSPSC Code:
12171500
PubChem Substance ID:
24847193

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

SMILES string

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

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

InChI key

WCIQBKUTYDIBJC-UHFFFAOYSA-M

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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 Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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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)
H T Chang et al.
Electrophoresis, 22(3), 394-398 (2001-03-22)
Electroelution of protein bands from a gel has advantages over the competitive common technique requiring gel sectioning with respect to yield, speed and the potential for computer-controlled application to multicomponent two-dimensional (2-D) gels. The electroelution design for the commercial high-performance
[Pharmaco-analytical application of tetrabromophenolphthalein ethyl ester indicator dye. III. Interaction between alkaloids and TBPE].
G Szász et al.
Acta pharmaceutica Hungarica, 50(4), 161-165 (1980-07-01)
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
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