Coated sodium percarbonate granules with improved storage stability

The invention relates to an sodium percarbonate particle, comprising a fluidized - bed is granulation agent comprises sodium percarbonate as a main component thereof, comprising the organic hydroxide with salt as a main component of coating, and comprises at least one of surfactant and a main component of coating, wherein the surfactant or comprises one or more of the alkali - metal, the alkali - metal or ammonium salt form the group of sulphate or sulfonate. The invention further relates to a method for preparing to the particle the method, the particle and washing the application of bleaching agent, and a to the particle a bleaching agent and cleaning agent. This invention claims a sodium percarbonate displays particles with the storage stability improved with the inner stability and high reactive oxygen content with.