Roussel Uclaf

Roussel Uclaf

Roussel Uclaf S.A. was the second largest French pharmaceutical company before it was acquired by Hoechst AG of Frankfurt, Germany in 1997, with pharmaceutical operations combined into the Hoechst Marion Roussel (HMR) division. Roussel Uclaf's agrochemical operations had been transferred to Hoechst Schering AgrEvo GmbH in 1994.

HMR subsequently merged in 1999 with Rhône-Poulenc to form Aventis, which then merged in 2004 with Sanofi-Synthélabo to form Sanofi-Aventis. Hoechst Schering AgrEvo merged in 1999 with Rhône-Poulenc's agrochemical division to form Aventis CropScience, which was acquired by Bayer AG in 2002 and combined with Bayer's agrochemical division to form Bayer CropScience.