ABSTRACT
Carbamide peroxide (CH6N20 3) in a 10% aqueous solution is used in most of the home bleaching kits. This breaks down to a 3.35% solution of hydrogen peroxide (H20 2) and 6.65% solution of urea (CH4N20). A 15% and a 20% solution of carbamide peroxide are also available for the dentist supervised homebleaching procedure. The 15% carbamide peroxide solution yields 5.4% hydrogen peroxide and the 20% one yields 7% hydrogen peroxide (Fasanaro 1992).
