Medical Term:

bromcresol purple

Pronunciation: brom-krē′sol pŭr′pil

Definition: A substituted triphenylmethane dye (pKa 6.3), practically insoluble in water but soluble in alcohol and dilute alkalies; used as an indicator of pH (yellow at pH 5.2, purple at pH 6.8).

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Examples: glitazone, GI cocktail, etc.

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