On 7 August 2015, U. S. Department of Commerce China xanthan gum to make anti-dumping administrative review preliminary: Inner Mongolia Fufeng Biotechnology Co., Ltd. (Neimenggu Fufeng biotechnologies Co., Ltd): 0.00%; Zibo Zhongxuan Biochemical Co., Ltd. (deosen biochemical Ltd.): 5.14%, CP kelco (Shandong) Biological Products Co., Ltd. (CP kelco (Shandong) biological Company Limited): 5.14%; Shanghai Zhitong Chemical Co., Ltd. (Shanghai smart Chemicals Co. Ltd.): 5.14%.

August 29, 2014, the United States commerce department of China, the original plastic anti-dumping investigation, the investigation period was from June 30, 2014 to July 19, 2013, involving the product of Customs encoding 39139020.