March 25, 2014 , the U.S. Department of Commerce in China hydroxy ethylidene diphosphonic acid preliminary anti-dumping administrative review : Shandong Taihe Chemical Company (. Shandong Taihe Chemicals Co, Ltd) dumping margin of 43.58 percent .
June 3, 2013 , the U.S. Department of Commerce in China hydroxy ethylidene diphosphonic acid administrative review of anti-dumping investigation , the investigation period of April 1, 2012 – March 31, 2013 , involving customs codes for 29,310,090.43 .(http://www.lubonchem.com supply)
