Guanidine carbonate is used as precipitating agent in the weight determination of zinc, cadmium and manganese, also used in the separation and organic synthesis of the magncsium in alkali metal. The product is the raw material in the organic synthesis and the analytical reagent, can be used to produce antioxidants, resin stabilizer, the pH regulator of amino resin, guanidine soap and so on; it is also used as the additives of cement grout agent and surfactant. In terms of synthetic detergent, it is used as wet resistant agent and synergistic agent.