... % ≤0.9%NaCL % ≤0.15%Fe2O3 % ≤0.005%Application: The use of sodium hydroxide and alkaline desiccant, paper, aluminum smelting, refining tungsten, rayon ... of metallic sodium, water electrolysis, as well as inorganic salt production, preparation of borax, chromium salt, potassium permanganate, phosphate, etc., but also the use of ...