Pronunciation: brom-fē-nol blū
A substituted triphenylmethane dye (MW 670, pK 4.0), used as an acid-base indicator (yellow at pH less than 3.1, blue at pH more than 4.7); also used for histochemical and electrophoretic demonstration of proteins.
Synonym(s): bromophenol blue
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Examples: glitazone, GI cocktail, etc.