ESKEN was founded in 1989, specializing in researching and supplying pharmaceutical impurities and reference standards. Since its establishment, ESKEN has cooperated with many well-known research institutions and drug manufacturers all around the world, and also enjoys good reputation in the world.

Our research center owns well-equipped R&D and production facilities, professional and experienced research teams to assure the quality of our products. we supply products including reference standards for APIs,impurities, intermediates,metabolites,degradation products,antibiotics, amino acid derivatives and etc.

Certificate of Analysis (COA) will be provided for all these materials which characterized using HPLC, MS, NMR spectra, elemental analysis and other testing as requested by our clients.

Our extensive custom synthesis capabilities enable us to provide you with the best quality and competitive price.