|
|Section2= |Section6= |Section7= }} Hydrogen peroxide - urea is a solid composed of equal amounts of hydrogen peroxide and urea. This compound is a white crystalline solid, which dissolves in water to give free hydrogen peroxide. Often called carbamide peroxide in the dental applications, it is used as a source of hydrogen peroxide for bleaching, disinfection, and oxidation. ==Structure, properties, production== Akin to water of crystallization, hydrogen peroxide cocrystallizes with urea with the stoichiometry of 1:1. The compound is simply produced (on a scale of several hundred tonnes a year) by the dissolution of urea in excess concentrated hydrogen peroxide solution, followed by crystallization. The laboratory synthesis is analogous. Upon dissolving in various solvents, this 1:1 complex dissociates back to urea and hydrogen peroxide. So just like hydrogen peroxide, the adduct is an oxidizer. The solubility of commercial samples varies from 0.05 g/mL〔(Sigma-Aldrich specification sheet )〕 to more than 0.6 g/mL.〔(Chemicalland data sheet )〕 The solid state structure of this adduct at the right has been determined by neutron diffraction. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hydrogen peroxide - urea」の詳細全文を読む スポンサード リンク
|