... within 2-40%. It is widely used in chemical, light industry, pharmacy, food, environment protection and other trades.For instance : butane ... hydrogencarbonate, ammonium chloride, ammonium nitrate, ammonium sulphate, anthracene, antibiotics, barium chloride, barium carbonate, barium sulphate, benzene, blood products, blue vitriol, borax, boric acid, calcium ...