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Zyklon B (German: [tsyˈkloːn ˈbeː] ⓘ; translated Cyclone B) was the trade name of a cyanide-based pesticide invented in Germany in the early 1920s. It consists of hydrogen cyanide (prussic acid), as well as a cautionary eye irritant and one of several adsorbents such as diatomaceous earth .
A can of Zyklon B with adsorbent granules and original signed documents detailing ordering of Zyklon B as "materials for Jewish resettlement" (on display at Auschwitz concentration camp museum) Tesch & Stabenow was founded in 1924 in Hamburg. [2] In 1925, the firm became the only distributor of Zyklon on behalf of Degesch east of the Elbe.
It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2] For this reason it is essential to use multiple different tests to show all adulterants.
Exposure to lower levels of cyanide over a long period (e.g., after use of improperly processed cassava roots; cassava is a staple food in various parts of West Africa) results in increased blood cyanide levels, which can result in weakness and a variety of symptoms, including permanent paralysis, nervous lesions, [14] [15] [16] hypothyroidism ...
Bruno Emil Tesch (14 August 1890 – 16 May 1946) was a German chemist and entrepreneur. Together with Gerhard Peters and Walter Heerdt, he invented the insecticide Zyklon B.
Degesch held the patent on the infamous pesticide Zyklon, a variant of which was used to execute people in the gas chambers of German extermination camps during the Holocaust. Through the firms Tesch & Stabenow GmbH (Testa) and Heerdt-Linger (Heli), Degesch sold the poisonous gas Zyklon B to the German Army and the Schutzstaffel (SS).
Several IG Farben executives said after the war that they did not know about the gassings, despite the increase in sales of Zyklon B to Auschwitz. IG Farben owned 42.5 percent of Degesch shares, and three members of Degesch's 11-person executive board, Wilhelm Rudolf Mann , Heinrich Hörlein and Carl Wurster , were directors of IG Farben. [ 52 ]
Executions of the remaining prisoners continued at Majdanek in the following months. Between December 1943 and March 1944, Majdanek received approximately 18,000 so-called "invalids", many of whom were subsequently murdered with Zyklon B. Executions by firing squad continued as well, with 600 shot on January 21, 1944; 180 shot on January 23 ...