Abstract: Acid water containing negative charge oxygen atoms and showing an acidity level higher than pH 5 is provided. Acid water of a pH level not lower than pH 5 is prepared by conveying negative charge oxygen atoms produced by heating a composite oxide enclosing active oxygen by themselves or by means of gas not reacting with water and contacting them with water.

Abstract: The present invention provides an enzyme-containing granulated product containing, in a uniformly dispersed state, an enzyme and one or more stabilizers selected from the group consisting of reducing agents and antioxidants. The invention also discloses a method for the production of the granulated product, as well as bleaching agents and detergent compositions containing the granulated product. The granulated product loses only a minimal level of enzyme activity even in the copresence of a bleaching agent, and exhibits excellent solubility. Therefore, bleach compositions and detergent compositions prepared by incorporating the granulated product fully exhibit the enzyme activity and bleaching activity.