It can also be prepared photochemically, by irradiating cupric hypophosphite with ultraviolet radiation. WM88 that could oxidize reduced phosphorus compounds, such as phosphite and hypophosphite, to phosphate. Arbotect (thiabendazole hypophosphite) became available some years later, and it has been proven effective. Nickel sulfate is a typical nickel source, and sodium hypophosphite is a typical reducing agent. Sodium hypophosphite is mainly used for electroless nickel plating (Ni-P). Sodium hypophosphite should be kept in a cool, dry place, isolated from oxidizing materials.