Wuhan Dachu Hexing Technology Co.,Ltd ( Welink International Enterprise Ltd ) is a state-of-the-art chemical manufacturing facilities in Wuhan,the center of China. Our mission is to help our customers achieve the highest quality at the lowest costs, and in the quickest time for their drug discovery and development programs. As one of the leading manufacturers of phase transfer catalysis (PTC) and cationic surfactant, We provide a comprehensive range of quaternary ammonium salts, quaternary p...