This invention being the preparation for bleaching tooth which includes the addition product which is compounded from the starting substance which includes peroxide, urea, and alkaline metal poly- phosphorus acid, the aforementioned addition product is given under water condition in the aforementioned preparation, at the same time pH in aqueous solution of the aforementioned preparation, rises when diluting the aforementioned solution, it regards the preparation for bleaching tooth.本発明は、過酸化物、尿素、及びアルカリ金属ポリリン酸塩を含む出発物質から調合される付加物を含む歯の漂白用調製品であって、前記付加物が前記調製品において水性条件下で与えられ、且つ前記調製品の水溶液中のpHが、前記溶液の希釈時に上昇する、歯の漂白用調製品に関する。
