Molecular formula: kh2po4 molecular weight: 136. 09 standard executed: hg2321-1992 cas number: 7778-77-0 properties: white or colorless crystal, easily soluble in water, relative density at 2. 338g/cm3, melting point at 252. 6 ℃ , and ph value of 1% solution is 4. 5. uses: used to manufacture metaphosphate in medical or food industry. Used as a high effective k and p compound fertilizer. It contains totally 86% fertilizer elements, used as a basic raw material for n, p and k compound fertilizer. packing and storage: in 25kg, 50kg, 1000kg net bags, store at a cool, dry and well ventilated place.