Provided is a multi-component system, and a method for preparing a hypochlorite composition with increased viscosity with a composition pH in the range of 7 to 12. For example, and preferably, the system and method may be used to provide (hydro)gelled hypochlorite composition. The system or method make use of a first quantity of a first component including hypochlorite or a source of hypochlorite at a pH in the range of 10 to 13.5 preferably 11 to 13.5 and a separate component including a pH induced thickening agent in "dry" form or in dissolved and/or dispersed form at a pH less than 7. The pH induced thickener is capable of increasing the viscosity of a composition upon subjecting it to an increasing pH such as in particular the composition pH in the range of 7 to 12. The pH induced thickener is thus for causing an increase of viscosity in the hypochlorite composition caused by the alkaline composition pH experienced by the pH induced thickener. A pH adjusting (acidic or basic) agent may be present to adjust the composition pH to the desired range. The hypochlorite composition is obtainable by combining amounts of the components in the system.
