... 51.5051.50Potassium oxide (K2O) % ≥34.034.0PH value of 1% solution4.4-4.84.4-4.8Moisture% ≤0. ... cm3, melting point 252.6°C,and PH value of solution is 4.5.4. Application: Mainly used ... a high-quality basic raw material for the making of compound fertilizer of three elements: nitrogen, phosphorus, and potassium.5. ... bags, paper bags, or PE bags. The net weight of each bag cab be 25kg, 50kg, 1000kg. Store ...