Shandong Zhengtongyuan International Trading Co., Ltd. is a professional importing and exporting company.We have Four factories in Shandong Tianjin and Shanghai.We specialize in Plastic & Chemical products,Machinery Equipment. Our Chemical products include Food Additives and medicine Intermediate,such as Sodium Propionate,Calcium Propionate,Sodium Benzoate,Sodium Matabisulfite,Silicon Dioxide,Ammonium Bicarbonate,L-Arabinose,Xylitol,2-Deoxy-L-Ribose,Sodium Gluconate,MMTD,MTD,MMT,MethI Isothiocyante and so on. We can also provide other chemical products,for examples Caustic Soda Flakes, Caustic Soda Solid,Caustic Soda Pearl,Sodium Formate,Ultramarine Blue ect. The Rubber Mats,PVC Cellular Foam Boards,Taekwondo Mat,Cast Acrylic Sheets,PMMA/ABS Sheets are our main plastic products. ..