We are offering Potassium Sulphate Powder for NPK production only (in bulk $420 CIF WORLDWIDE) Potassium Sulphate Standard Powder 50% K2O Potassium Sulphate Granular 50% K2O Potassium Sulphate Water-Soluble 52% K2O Minimum Order Quantity 5000 MT and 24000 MT for SOP 52% K2O and SOP 47%