Phenolphthalein

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The American Heritage® Dictionary of the English Language, 4th Edition
  • n. A white or pale yellow crystalline powder, C20H14O4, used as an acid-base indicator, in making dyes, and formerly in medicine as a laxative. Because of its toxicity, it is no longer used in over-the-counter laxatives.
    • Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. A quinone derivative used as a pH indicator, and once used as a laxative
    • the GNU version of the Collaborative International Dictionary of English
  • n. See under Phthalein.
  • 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.
  • n. a white or yellowish white crystalline substance made from phthalic acid and phenol. Its solution in alkalies is brilliant red, but is decolorized by acids, and as this reaction is exceedingly delicate it is used as an indicator.
    • The Century Dictionary and Cyclopedia
  • n. A white crystalline compound, C20H14O4, made by heating a mixture of phthalic anhydrid and phenol with a dehydrating agent, as stannic chlorid or sulphuric acid. The dilute alcoholic solution is much used as an indicator in titrating. It can he used with weak or strong acids and strong bases. It melts at 250–253° C.
    • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • n. 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
    • Equivalent
    phenol phthalein   
    Hypernym
    Words that are more generic or abstract
    acid-base indicator    laxative   
    Rhyme
    Words with the same terminal sound
    Galen    Venezuelan    calan    galan    kalan   
    Same Context
    Words that are found in similar contexts
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