- Prussic Acid Congress
- The congress was held in Frankfurtam-Main on 27–28 January 1944. The purpose of the meeting, which was initiated by the Schutzstaffel (SS) leadership, was to inform companies that produced and distributed prussic acid to the death camps of plans for the further use of Zyklon B gas. Among the many firms represented at the congress were Degesch, Tesch and Stabenow, Heerdt-Lingler, the Dessau Works, and I. G. Farben.
Historical dictionary of the Holocaust. Jack R. Fischel. 2014.