Patent No. US 7,378,380 B2
Reckitt Benckiser (UK) Limited has patented a dilutable composition comprised of a pH-elevating component and a pH-lowering component. The pH-elevating component dissolves or disperses in water to form a mixture where the pH is elevated to at least 8.5. Subsequently, the pH-lowering component dissolves or disperses in the mixture and the pH of the mixture is lowered from at least 8.5 to not more than four. The composition, which contains a surfactant, an oxidizing agent and reducing agent, is provided as a dispersion or suspension of a particulate component in a liquid carrier.