apperance:white flakes .
application :the anufacture of chemicals,paper,alumium smelting,refining tungsten,artifical silk, rayon and soap manufacturing,produtiong of dyes, plastics, pharmaceutical and organic intermediates,the old rubber recycling,metal sodium ,wter electrolysis as well as the inorganic salt production,preparation of borax,chromium salt manganese salt ,phosphate,etc.need too use a lot of caustic soda.