Single Superphosphate is chemical fertilizer products which have extensive useful at present, it obtained by apatite which decomposed from the sulfuric acid and then ripened, and its main ingredients is calcium phosphate primary and calcium phosphate. 过磷酸钙是目前使用广泛的化肥产品,其由硫酸分解磷灰石再经熟化制得的,其主要成分为磷酸钙和磷酸二氢钙。