Patent ID: 6120555
Filing Date: 2000-09-19
Classification: C11D,D06L

Abstract:
A liquid bleaching composition having a pH of from 8 to 14, said composition comprising an alkali metal hypochlorite or mixtures of two or more alkali metal hypochlorites, and a pH buffering means, wherein said pH buffering means, when used in a 1M solution at pH 10, requires more than 2.5 mM of calcium ions, in order to cause precipitation at 25.degree. C. of the calcium salt of the alkali anion of said pH buffering means; wherein said pH buffering means is selected from the group consisting of alkali metal salts of metaborate, alkali metal salts of stannate, and mixtures thereof; and wherein said alkali metal hypochlorite is not lithium hypochlorite when said pH buffering means is sodium metaborate.