Hoechst AG
（重定向自Hoechst Aktiengesellschaft）
![The former Hoechst AG and today's Industriepark Höchst](/Images/godic/202501/18/Industriepark_Höchst,_Leunabrücke5946.jpg")
![Building and operating licence for the chemical plant Meister, Lucius & Co. by the administration of the Duchy of Nassau in 1862](/Images/godic/202501/18/Hoechst_AG_Baubewilligung_18625946.jpg")
Hoechst AG (German pronunciation:[ˈhøːkst]) was a German chemicals then life-sciences company that became Aventis Deutschland after its merger with France's Rhône-Poulenc S.A. in 1999. With the new company's 2004 merger with Sanofi-Synthélabo, it became a subsidiary of the resulting Sanofi-Aventis pharmaceuticals group.