Patent ID: 7067115

Claim:
A composition for whitening teeth comprising: a first component in the form of a suspension or solution comprising about 5% to 34% carbamide peroxide and up to 50% water, and at least one stabilizer selected from the group consisting of sodium silicate, 8-hydroxyquinoline, sodium stannate, oxalic-bis (cyclohexylidenehydrazie), amino-trismethylene-phosphonic acid, 2- phosphonobutane-1,2,4-tricarboxylic acid, sodium pyrophosphate, and 1-hydroxyethylidene1,1-phosphonic acid, said first component having a pH of about 3.0 to 7.5; and a second component in the form of an aqueous gel or paste comprising one or more alkali materials selected from the group consisting of: oxides of metals belonging to the first or second group of the Periodic Table, hydroxides of metals belonging to the first or second group of the Periodic Table, and sodium, potassium, calcium, or magnesium salts of weak acids; said second component having a pH of about 8.0 to 12; wherein admixing of said first and second components prior to applying the composition to teeth provides the composition for whitening teeth having a pH of about 8.0 to 12.