| 摘要 |
The invention relates to particles having a core comprising a peroxy compound with capability of releasing hydrogen peroxide or peroxy acids in aqueous solutions, which particles have a coating containing a chelating agent selected from alkali metal salts or alkaline earth metal salts of a hydroxy carboxylic acid satisfying the formula: RCnHm(OH)nCOOH in which R is CH2OH or COOH, n is 2-6 and m is 0-n. The invention also relates to preparation and use of the particles, as well as a composition containing such particles.
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