Formulated for deoxygenating and neutralizing boiler water treatment, with low salt content and high efficiency for medium pressure generators. It neutralizes the oxygen naturally present in the water and forms a layer of magnetite on the metal to avoid surface corrosion; it reacts with the carbon dioxide present in the water, adjusting the pH value and protecting all metal surfaces in contact with steam or water from corrosive phenomena, due to the aggressiveness of carbonic acid. It is particularly suitable for medium-pressure steam generators.