Healthy Effectual Anti Estrogen Steroids 4-Androstenedione 4-AD CAS 63-05-8 USP Standard

Shanghai Doublewin Bio-Tech Co., Ltd is a high-tech and professional company founded in 2002, which specialized in developing, manufacturing,, distributing steroid hormone powders and intermediates. We have been devoted to R&D, production, and marketing steroid hormone and pharmaceutical raw materials.

With advanced production technology and equipment, strong technical force, first-class laboratory and inspection equipment. Doublewin has developed into a professional factory manufacturing anabolic steroid powders with several years'efforts and contribution of experienced technicians in different areas. Company affiliated factory has advanced production equipment and plants, perfect quality assurance and control system, a whole set of High-Pressure Liquid Chromatography/Gas Chromatography/UV Spectrophotometer to conduct effective product analysis and monitoring. Company factory has passed ISO9001 quality system certification and international KOSHER certification.

Now, we continue its high-speed development and contributes a lot to its new products' R&D and quality improvement. Under the credibility and win-win principle,Doublewin biotech will devote to culture innovation to provide excellent products and the best service to our customers.