Phenolphthalein - Definition - Law Dictionary Home Dictionary Definition phenolphthalein

Definition :

A white or yellowish white crystalline substance C20H14O4 formed by condensation of the anhydride of phthalic acid and phenol Its solution in alkalies is brilliant red but is decolorized by acids This reaction being very delicate is used as an indicator It is sometimes used as a laxative in veterinary medicine