Hangzhou Zhongchang scientific co., Ltd., is a specialized pharmachemical manufacturer. Our office is in hangzhou,and Our factory is headquartered in Shangyu Fine Chemical Park, Shangyu, Zhejiang and we have two subsidiary production units in Xinchang and Shengzhou, Zhejiang. Our International Sales Department is located in Hangzhou. We mainly offer: 4-A minosalicylic Acid, Sodium Aminosalicylate, (S)-(+)-2- Alaninol (L-2-Amino Propanol) , Oil liquid disperse Sodium...