[properties]: white granular crystal; relative density at 1.803, melting point at 190¡æ, easily soluble in water, slightly soluble in alcohol, insoluble in ketone, ph value of 1% solution is 4.5. [uses]: as a fire-prevention agent for fabric, timber and paper, as well as a fire-prevention coating, and dry powder for fire extinguisher. For food grade it is mainly used as a fermentation agent, nourishment, and so on. Used as a high effective non-chloride n, p compound fertilizer in agriculture. Its total nourishment (n=p2o5) is at 73%, and may be used as a basic raw material for n, p and k compound fertilizer. Specifications techinical grade food grade Main content, as nh4h2po4.Min 98 99.0 Phosphorus pentoxide, as p2o5. Min 61 61 Nitrogen£¡í8as n£© Min 11.9 _ Moisture. Max 0.2 0.2 Water insoluble. Max 0.1 0.1 Ph of 1% water solution. _ 4.4-4.8 Arsenic, as as. Max _ 0.0003 Fluoride, as f. Max _ 0.005 Packing: plastic knit bag, net weight 25 kg