resorcinolphthalein

1 definition found

resorcinolphthalein - WordNet (r) 2.1 (2005) :

  resorcinolphthalein
      n 1: a yellow dye that is visible even when highly diluted; used
           as an absorption indicator when silver nitrate solution is
           added to sodium chloride in order to precipitate silver
           chloride (turns pink when no chloride ions are left in
           solution and negative fluorescein ions are then absorbed)
           [syn: fluorescein, fluoresceine, fluorescent dye,
           resorcinolphthalein]