Bromocresol blue reagent

The best visuahzing reagents are brilhant cresyl blue, erythrosin B, and bromocresol blue for the detection of hydroquinone alkaline blue, thymolphthalein, and brilliant cresyl blue for pyrogallol and alkahne blue and brilliant green for phloroglucinol. ... 

Bromocresol Green — Bromophenol Blue — Potassium Permanganate Reagent... 

Bromocresol Green—Bromophenol Blue—Potassium Permanganate Reagent 229... 

Buffered Indicator Solution Prepare a mixture consisting of 700 mL of 0.1 M citric acid (anhydrous, reagent grade), 200 mL of 0.2 M disodium phosphate, and 50 mL each of 0.2% bromophenol blue and of 0.2% bromocresol green in spectrograde methanol. 

Bromocresol Green—Bromophenol Blue—Potassium Pemumganate Reagent... 

The indicators were obtained from Kodak Laboratory Chemicals, Aldrich Chemical Company, and J.T. Baker and were used without further purification. The indicators employed in the majority of the titrations were bromocresol green and bromothymol blue each of which exhibits two acid-base transitions at Pka = -3.7, +4.6, and -1.5, +6.8, respectively(20, 22, 26) The medium for the titration and electrophoretic mobility experiments was benzene (Burdick and Jackson Laboratories) having a water content of less than 0.03 percent. The base used as titrant was n-butylamine, Baker analyzed reagent grade. 

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