phenolphthalein

POS

Noun

HYPHEN

phe=nol=phtha=lein

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CIDE DICTIONARY

phenolphthalein, 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. It is sometimes used as a laxative in veterinary medicine. [Webster 1913 Suppl.]

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OXFORD DICTIONARY

phenolphthalein, n. Chem. a white crystalline solid used in solution as an acid-base indicator and medicinally as a laxative.

Etymology

PHENOL + phthal f. NAPHTHALENE + -IN

For further exploring for "phenolphthalein" in Webster Dictionary Online

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