IG Farben was formed in 1925 as a merger of six German chemical companies: BASF, Bayer, Hoechst, Agfa, Chemische Fabrik Griesheim-Elektron, and Chemische Fabrik vorm. Weiler Ter Meer. It became the largest company in Europe and the largest chemical and pharmaceutical company in the world.
IG Farben Knowledge Showdown: 19 Questions to Determine the Champion