Lexic.us

Definition of Phthalein

1. n. One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthaleïn. Their alkaline solutions are fluorescent.

Definition of Phthalein

1. Noun. (organic chemistry) any of a range of lactones formed by the reaction of phenols with phthalic anhydride ¹

¹ Source: wiktionary.com

Definition of Phthalein

1. [n -S]

Medical Definition of Phthalein

1. One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthalein. Their alkaline solutions are fluorescent. Phenol phthalein, a white or yellowish white crystalline substance made from phthalic acid and phenol. Its solution in alkalies is brilliant red, but is decolourized by acids, and as this reaction is exceedingly delicate it is used as an indicator. See: Phthalic. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Phthalein

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