TIANJIN BOYA INTERNATIONAL LIMITED is an import and export enterprise of China, which is mainly engaged in the chemical manufacture and international trade. We specialize in the chemical products such as Sodium Bicarbonate, Sodium Sulphide, Sodium Hydroxide, Sodium Carbonate竊�arium Sulfate, Chromium Sulphate, Ammonium Chloride ,Barium chloride, Dicyandiamide, Calcium Carbide, Humic Acid, Formic acid, Oxalic Acid, Sodium Hydrosulfide, Sodium metabisulphite, Sodium thiosulfate and so on.