Abstract: An electrolytic system for obtaining a disinfectant and/or sterilant is disclosed. The system comprises, among other components, at least one reaction cell, that contains a selectively permeable membrane placed between two electrodes that generate a charged field across the cell when dilute electrolytic solutions are passed through the cell. The cell is split between the electrodes by a cationic exchange membrane, which divides the reactor into an anodic chamber and a cathodic chamber. In the reaction cell, a diluted salt solution is fed separately to both chambers that electrically dissociates the same, in order that when the salt solution used is a sodium chloride solution, an aqueous solution of O3, O2, H2O2, HClO, Cl2, HCl, H+, H3O+, OH? and ClO is formed in the anodic chamber. The solution obtained in the anodic chamber being useful as a disinfectant.