Sentence Examples


  • For example, the C-Clarifying Serum contains 10 percent prescription strength vitamin C and four percent prescription strength hydroquinone to promote a brighter, more even skin tone.
  • If you want to hasten the process, use over-the-counter skin creams designed to lighten dark spots; many of these contain hydroquinone, a bleaching ingredient.
  • Over-the-counter skin bleaches don't contain as much of the active ingredient hydroquinone as prescription bleaches and may be used in less severe cases.
  • Chromium oxychloride reacts violently on phenol, producing hydroquinone ether, O(C 6 H 4 OH)2; chromic acid gives phenoquinone, and potassium permanganate gives paradiphenol, oxalic acid, and some salicylic acid (R.
  • All four mono-hydroxyxanthones are known, and are prepared by heating salicylic acid with either resorcin, pyrocatechin or hydroquinone; they are yellow crystalline solids, which act as dyestuffs.