About Us Changzhou Hongyou Chemical Co., Ltd. began its operations by producing water treatment additives and subsequently expanded into the production of additives and plastic masterbatches. Leveraging this foundation, we established an independent sales company to actively engage in both domestic and international trade. While some of our products have entered the European market, we have also formed partnerships based on mutual benefit with renowned multinational companies such as Ciba Specialty Chemicals and BASF Germany, securing distribution rights for their light stabilizers and antioxidants. We warmly invite all clients to visit our company for business discussions.