Tengzhou Zhongzheng Chemical Co., Ltd is a leading producer that situated in Tengzhou city Shandong China. The company was built in 2002, and dedicated to producing and selling the food and feed additives, such as Calcium Propionate, Ammonium Propionate, Calcium Acetate, Sodium Propionate and Sodium Benzoate. In the past, we gained good reputation from our customers with our good quality products and service. The factory was built under the GMP and ISO 22000 standard and approved by Halal and Kosher organization. The products were tested by SGS and confirmed to the standard.