Canadian Medical Guide > Chemicals and Drugs > Organic Chemicals > Phenols > Phenolphthaleins Terms and Definitions

Phenolphthaleins

Medical Definition:	A family of 3,3-bis(p-hydroxyphenyl)phthalides. They are used as CATHARTICS, indicators, and DYES.
Guide Notes:	PHENOLPHTHALEIN is also available

Phenolphthaleins Categories.

	Phenolphthalein - An acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic.
	Phenolsulfonphthalein - Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems.
	Sulfobromophthalein - A phenolphthalein that is used as a diagnostic aid in heptatic function determination.
	Thymolphthalein - Used as a pH indicator and as a reagent for blood after decolorizing the alkaline solution by boiling with zinc dust.

Phenolphthaleins Medical Definitions and Terms

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