Changzhou Yao&＃039;s Tongde Chemical Co., Ltd. is established in 1997, and it is a high-tech corporation of a AAA grade. We have always engaged in the research, development, production and application of the water treatment chemicals. Our company has advanced production technology and perfect detection method, as we have many technical staffs specializes in water treatment chemicals and advanced water treatment chemical equipments, and passed ISO9001 quality system authentication in 2001. With the constant enlargement of the production scale, in order to adapt to the fierce market competition situation, we participated the international market competition, accelerated the development of the export-oriented economy of corporation. Our company got self-operation export and import right formally in 2003. Our main export products are Organophosphorous Antiscale and Corrosion Inhibitors, Organophosphorous Salts, Polycarboxylic Antiscale and Dispersant, Bactericide and Algicide, Copper Corrosion Inhibitor, etc. The total yield have reached over 20, 000 tons now. The products are applied in industrial water treatment such as cooling towers, geothermal power plants, boilers, reverse osmosis systems, and oil fields. We have exported to Singapore, U.S.A., Japan, Korea, India, Southeast Asia, Mid east, Europe, etc, and won the customer&＃039;s unanimous favorable comments.