Zyklon B was the trade name of a cyanide-based pesticide invented in Germany in the early 1920s. It consists of hydrogen cyanide, as well as a cautionary eye irritant and one of several adsorbents such as diatomaceous earth. From Wikipedia
Furchner's death concludes one of the last major legal chapters addressing Nazi-era crimes, following her 2022 conviction for aiding in over 10,000 murders at the Stutthof concentration camp.
