PHENOLPHTHALEIN
\fˈɛnəlfθˌe͡ɪliːn], \fˈɛnəlfθˌeɪliːn], \f_ˈɛ_n_ə_l_f_θ_ˌeɪ_l_iː_n]\
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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.
By DataStellar Co., Ltd
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Purgen, obtained by the action of phenol on phthalic anhydride; a crystalline substance employed as a reagent, being turned red by alkalies, and as a purgative in doses of gr. 1-5 (0.06-0.3).
By Stedman, Thomas Lathrop
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A yellowish crystalline principle from coal-tar.
By Willam Alexander Newman Dorland
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