... of de-inking of paper industry, chemical industry, inorganic chemical raw materials and sulfate removal agent, coagulant of sodium ... preparation of metallic sodium and other sodium.Usage:It is mainly used in producing anhydrous sodium carbonate,sodium hydrate,sodium metal, glauber salt ... Heavy metal (Pb) /%≤0.0005≤0.0002 Nitrogen compounds (N) /%≤0.001-Dry weightlessness /%≤0.5≤0.5Ferrous cyanide ...