Hoechst AG
| Company type | Public | 
|---|---|
| Industry | Chemical, pharmaceutical | 
| Founded | 1863 | 
| Successor | Sanofi | 
| Headquarters | Höchst, Frankfurt, Germany | 
| Number of employees | 96,967 (31 December 1998) | 
Hoechst AG (German pronunciation: [ˈhøːçst]) was a German chemicals, later 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.