Changzhou Welton Chemical Co., Ltd, located in the Changzhou Binjiang Chemical Industry Park, Jiangsu provice, China, is specialized in providing high quality biological buffers, pharmaceutical intermediates, pesticide intermediates and dyestuff intermediates. As a result of the support of our customers and the endeavor of our employees, who focus on service and quality, the Changzhou Welton Chemical Co., Ltd. is now the leading supplier and manufacturer of biological buffers in China and has built up an extensive customer base abroad. Based on our years of experience in this field, we take great pleasure in bringing to you our products