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Site Frankfurt Griesheim
| 1856 | The „Frankfurter AG for agrochmichal products“ founded in Griesheim. |
| 1952 | This site was combined with Farbwerke Hoechst (later Hoechst AG) |
| 1991 | The carbon business ended up in SGL Carbon |
| 1997 | Specialty FineChemical business went to Swiss based Clariant AG |
| 2001 | Clariant divested three Griesheim production units to Allessa Chemie |
| 2003 | Griesheim Industry Park was founded (IPG). |
| 2007 | The remaining Clariant SFC business was sold to ICIG investors and was integrated in WeylChem Group. |
Site Frankfurt Hoechst
| 1862 | Chemische Fabrik Meister Lucius & Co. takes up operation west of Hoechst |
| 1883 | The first drug manufacturing started at this site |
| 1910 | Another pharmaceutical milestone: Paul Ehrlich developed Salvarsan highly effective for the treatment of syphilis. |
| 1925 | The factory was fused to form IG Farbenindustrie AG, which was dissolved by Alllied Forces in 1945. |
| 1951 | Establishment of Farbwerke Hoechst AG |
| 1997 | The industry park Höchst is opened to non-Hoechst companies. Hoechst AG sold its Specialty FineChemical business to Clariant AG. |
| 2007 | The Hoechst based plants VP3 (side chain chlorination) and VP 5 (oxidation) was sold to ICIG investors and was integrated in WeylChem Group. |