1176-74-5 Usage
Chemical Properties
Yellow to red powder
Uses
3′,3″,5′,5″-Tetrabromophenolphthalein ethyl ester (TBPE) is an anionic dye used as a counter ion in the spectrophotometric determination of cationic surfactants. TBPE is also used in the spectrometric determination of aliphatic primary, secondary and tertiary amines.
General Description
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Purification Methods
Crystallise the ester from *benzene, dry at 120o and keep it under vacuum. [Beilstein 10 III 4490.]
Check Digit Verification of cas no
The CAS Registry Mumber 1176-74-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,7 and 6 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1176-74:
(6*1)+(5*1)+(4*7)+(3*6)+(2*7)+(1*4)=75
75 % 10 = 5
So 1176-74-5 is a valid CAS Registry Number.
InChI:InChI=1/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
