As a leading manufacturer, Haichem Co., Ltd. main products cover hair dyes, active pharmaceutical ingredients and special intermediates like derivatives of pyridine, pyrazole, indole etc. We have two production sites and one R&D center with experienced chemists. By handling Hydrogenation, Chlorination, Ethoxylation, Acetylation, Alkylation, Amination (substitution), Diazotization, Nitration, Nitrosation, Cyclization, Sulphonation, Esterification, Etherification, Salt Formation, Amine and Hydrazine Derivatisation, Haichem does contract manufacturing...