Sunwin Chemicals, including Shanghai Sunwin Chemicals Co., Ltd. and Weifang Sunwin Chemicals Co., Ltd., with the former being center of R&D and international trade and the latter being manufacturing site, is a Professional chemical enterprise, specializing in such areas as food additives, feed additives and pharmaceutical intermediates. Relying on an area of more than 18 acre of manufacturing base, Sunwin Chemicals has been producing mainly three series of products, namely betaine series, pyridine derivatives and organic chelates. We are one of the biggest suppliers of betaine series...