Shandong Xunda Chemical Co., Ltd, Nanjing Yangzi Petrochemical Fine Chemical Co., Ltd, Nanjing Yangzi Petrochemical Fine Chemical Co., Ltd, Dalian Chemical Industry Research and Design Institute, Nantong Huikang International Enterprises Co., Ltd, Wuxi Henghui Chemical Co., Ltd, Lanzhou Auxiliaries Factory
These companies have produced polymerization inhibitor.