Component Grade First-rate grade Koh %>= 90.0 K2co3 % 0.50 Chloride (cl) % 0.01 Sulfate (so42-) % 0.005 Nitrate nitrite (n) % 0.0005 Phosphate (po4) % 0.005 Silica (sio3)% 0.01 Fe% 0.0005 Na % 1.0 Ca % 0.005 Al % 0.002 Ni % 0.001 Pb% 0.002 Usage: Mainly used in alkaline batteries industry, soaps, high-class detergents and cosmetics industry, medicine intermediate, potassium chemicals, synthetic ruber, abs resin, food additive dyestuffs and so on. Packing: 25kg , 50kg , 1000kg plastic woven bag of each or as per customers requirement.