In December 1, 2016, the U.S. Department of Commerce announced amendments to the imports from Chinese 1,1,1,2- tetrafluoroethane (R-134a) anti-dumping preliminary results, including mandatory respondent companies Zhejiang chemical Limited by Share Ltd (Zhejiang Sanmei Chemical three Industry Co., Ltd.) and Jiangsu Three Chemical Co. Ltd. (Jiangsu Sanmei Chemicals Co., Ltd.), all China / exporter manufacturer (see list below) the weighted average dumping margin were revised to 232.30%.

In March 24, 2016, American HFC Coalition and International Association of Machinists and some members of the and Aerospace Workers in March 3, 2016 to submit the application, the U.S. Department of Commerce announced on imports from China 1,1,1,2- tetrafluoroethane to start anti-dumping investigation.

In June 6, 2016, the United States International Trade Commission (USITC) made the anti-dumping industry injury affirmative preliminary determination on imports from the China products involved.

In September 30, 2016, the U.S. Department of Commerce announced anti-dumping made affirmative preliminary determination on imports from Chinese 1,1,1,2- tetrafluoroethane, ruled that mandatory respondent companies Zhejiang Sanmei chemical Limited by Share Ltd and Jiangsu Sanmei Chemical Co. Ltd. and other have separate tax treatment involving producers / exporters dumping margin is 137.23%, do not enjoy the tax treatment of the separate mandatory respondent enterprises in Zhejiang of Quzhou Lianzhou refrigerant Co. Ltd. and other Chinese manufacturer / exporter of the dumping margin of 188.94%. The case involving the coordination of tariff lines of products under 2903.39.2020.