Purity (NaOH): 98% Min Sodium Carbonate (Na2CO3): 0.5 % Max Sodium Chloride (NaCl): 0.02 % Max Ferric oxide: 0.004% max. Packing: in 25 P.P KG bag. Uses: Used as soap-making, paper-making, printing, textiler, glass, porcelain enamel, pharmacy, dyestuff, metallic wares, pesticides, leather-making and fat-refining, etc.