... OF HG/T23272004 CHINESE NATIONAL STANDARDS, PURITY 99% min Insoluble in water 0.06% max Chloride content (as NaCl) 0.3 ... 0.02%Sodium Carbonate 0.1%Iron Content 0.005% Packing:In 25kg pp bag with pe film inside or the demanding of ... inorganic for chemical, industry ,for light industry, machinery etc. Used in manufacture of nitric acid, fertilizer, medicine, gunpowder, explosive, glass, pigment ...