Molecular formula: nh4h2po4 molecular weight: 115. 0 standard executed: q/74465717-9. 1-2005(tchnical grade) q/74465717-9. 2-2005(food grade) cas number : 7722-76-1 properties: white granular crystal; relative density at 1. 803, melting point at 190 , 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. packing and storage: in 25kg, 50kg, 1000kg net bage, store at a cool, dry and well ventilated place.