Sentence Examples


  • Sunburns may be avoided by the liberal use of a sunscreen containing either an opaque active ingredient such as zinc oxide or titanium dioxide or a nonopaque active ingredient such as PABA (para-aminobenzoic acid) or benzophenone.
  • On fusion with caustic potash it decomposes with formation of tetrahydroxy-benzophenone, which then breaks up into resorcin and hydroquinone.
  • Benzophenone oxime, CeHSC (:NOH)C 6 H 5, exists only in one modification which melts at 140° C.; whereas the unsymmetrical benzophenones each yield two oximes.
  • Distillation of its calcium salt gives benzophenone with small quantities of other substances, but if the calcium salt be mixed with calcium formate and the mixture distilled, benzaldehyde is produced.
  • BENZOPHENONE (DIPHENYL KETONE), C 6 H 5 CO.