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Definition of Phenolphthalein
1. Noun. A laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8.
Definition of Phenolphthalein
1. n. 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.
Definition of Phenolphthalein
1. Noun. (chemistry) A quinone derivative used as a pH indicator, and once used as a laxative ¹
¹ Source: wiktionary.com
Definition of Phenolphthalein
1. [n -S]
Medical Definition of Phenolphthalein
1. Obtained by the action of phenol on phthalic anhydride; used as a hydrogen ion indicator and as a laxative. (05 Mar 2000)
Lexicographical Neighbors of Phenolphthalein
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