Properties: White or colorless crystal, and relative density is 2.338, melting point is 252.6°C, easy to dissolve in water, PH value of 1% water solution is 4.5.Applications: Mainly used in medicine, food industry and making metaphosphates. Used as a high quality fertilizer material in agricultural crops. It is applied after being dissolved in water through the irrigation system or as a foliar spray  Used as a basic raw materials for N.P.K compound fertilizer Used in adhesives