... water softening, refining petroleum products, sanitation, hygiene and production chemicals.7.In food and drug industry, it is ... alkali, impregnant pigment.8.Use: For the papermaking, production of cellulosic thick liquid and dregs of rice; Used in ... recycling, metal sodium, water electrolysis as well as the inorganic salt production, Preparation of borax, chromium salts, manganese salts, phosphate, ...