Phenolphthalein
A compound used as a laboratory reagent and acid-base indicator and also used in over-the-counter (OTC) laxative preparations. Phenolphthalein may be a carcinogen (cancer-causing agent). Feeding of phenolphthalein caused cancer in multiple organs in multiple species of experimental animals. The US government in 2000 classified phenolphthalein as "reasonably anticipated to be a human carcinogen."
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Obtained by the action of phenol on phthalic anhydride; used as a hydrogen ion indicator and formerly used as a laxative.

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phe·nol·phtha·lein .fēn-əl-'thal-ē-ən, -'thal-.ēn, -'thāl- n a white or yellowish white crystalline compound C20H14O4 that is used in analysis as an indicator because its solution is brilliant red in alkalies and is decolorized by acids and that is used in medicine as a laxative

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phe·nol·phthal·ein (fe″nol-thalґēn) a cathartic and pH indicator, with a range of 8.5 (colorless) to 9.0 (red).

Medical dictionary. 2011.

Look at other dictionaries:

  • Phenolphthalein — IUPAC name 3,3 bis(4 hydroxyphenyl)isobenzofuran 1(3H) one …   Wikipedia

  • Phenolphthalein — Phe nol*phthal e*in, n., or Phenol phthalein Phenol phthalein(Chem.) 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 …   The Collaborative International Dictionary of English

  • Phenolphthalein — Phenōlphthaleīn, s. Phthalsäure …   Kleines Konversations-Lexikon

  • phenolphthalein — [fē΄nōl thal′ēn΄, fē΄nōl thal′ē in; fē΄nōl fthal′ēn, fē΄nōlfthal′ē in] n. [ PHENOL + PHTHALEIN] a white to pale yellow, crystalline powder, C20H14O4, used as a laxative, in making dyes, and as an acid base indicator in chemical analysis: it is… …   English World dictionary

  • Phenolphthalein — Strukturformel Allgemeines Name Phenolphthalein Andere Namen …   Deutsch Wikipedia

  • phenolphthalein — /fee nawl thal een, ee in, fthal , nol /, n. Chem., Pharm. a white, crystalline compound, C20H14O4, used as an indicator in acid base titration and as a laxative. [1870 75; PHENOL + PHTHALEIN] * * * ▪ chemical compound       an organic compound… …   Universalium

  • Phenolphthalein — Phe|nol|phtha|le|in auch: Phe|nolph|tha|le|in 〈n. 11; unz.; Chem.〉 zur Gruppe der Phthaleine zählender Triphenylmethanfarbstoff, wird als Indikator in der analytischen Chemie verwendet * * * Phe|nol|phtha|le|in [↑ Phthalein] Syn.: 3,3 Bis(4… …   Universal-Lexikon

  • phenolphthalein — fenolftaleinas statusas T sritis chemija apibrėžtis Indikatorius. formulė C₆H₄:[C(HOC₆H₄)₂OC(=O)] atitikmenys: angl. phenolphthalein rus. фенолфталеин ryšiai: sinonimas – 3,3 bis(4 hidroksifenil) 3H 1 izobenzfuranonas …   Chemijos terminų aiškinamasis žodynas

  • phenolphthalein — noun Etymology: International Scientific Vocabulary phenol + phthalein any of various xanthene dyes, from phthalic acid Date: 1875 a white or yellowish white crystalline compound C20H14O4 used in analysis as an indicator because its solution is… …   New Collegiate Dictionary

  • phenolphthalein — Indicator dye that is colourless at neutral pH and red pink in slightly alkaline solutions. Also used as a laxative …   Dictionary of molecular biology

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