Zyklon B

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Zyklon B (German pronunciation: [tsykloːn ˈbeː]; also spelled Cyclon B or Cyclone B) was the trade name of a cyanide-based pesticide invented in the early 1920s, and manufactured by German chemical conglomerate IG Farben. Zyklon B consisted of hydrogen cyanide (prussic acid), a stabilizer, a warning odorant (ethyl bromoacetate), and one of several adsorbents. Zyklon A was a previously produced liquid pesticide, which released hydrogen cyanide in a chemical reaction with water. After the invention of Zyklon B, Zyklon A production ceased.
The product is infamous for its use by Nazi Germany to murder an estimated 1.2 million people, including approximately 960,000 Jews, in gas chambers installed in several extermination camps during the Holocaust. One of the co-inventors of Zyklon B, chemist and businessman Bruno Tesch, was executed by the British in 1946 for his role in this operation.


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