Rhone-Poulenc S.A. was a French multinational pharmaceutical and chemical company formed in 1998 through the merger of Rhone-Poulenc and Hoechst AG. The company specialized in producing a wide range of products, including pharmaceuticals, agrochemicals, and specialty chemicals. It played a significant role in the development of various medical treatments and agricultural solutions. In 2004, Rhone-Poulenc S.A. became part of Sanofi-Aventis after a merger with Aventis. This transition marked the end of Rhone-Poulenc as an independent entity, but its legacy continues through the ongoing work of Sanofi in the pharmaceutical industry.