IG Farben was the private German chemicals company allied with the Nazis that manufactured the Zyklon B gas used to commit genocide against millions of European Jews, Roma, homosexuals, socialists and other innocent civilians in the Holocaust.
In World War II, Degesch (42.5 per cent owned by IG Farben) was the trademark holder of Zyklon B, the poison gas used at some Nazi extermination camps.
[1] IG Farben also developed processes for synthesizing gasoline and rubber from coal, and thereby contributed much to Germany's ability to wage a war despite having been cut off from all major oil fields.
On count three ("slave labor"), the judgement "allowed the defendants the benefit of the defense of 'necessity'" (Telford Taylor, "The Nuremberg War Crimes Trials"; International Conciliation, No.
Judge Hebert filed a dissenting opinion, in which he argued that the defense of "necessity" did not apply and that all defendants should have been found guilty on count 3 of the indictment.
[2]Willing cooperation with the slave labor utilization of the Third Reich was a matter of corporate policy that permeated the whole Farben organization ... For this reason, criminal responsibility goes beyond the actual immediate participants at Auschwitz.