Proper noun
English Wikipedia has an article on:Zyklon BWikipedia
Zyklon B
a pesticide consisting of hydrocyanic acid absorbed on pellets of diatomaceous earth; when exposed to the air hydrogen cyanide is released; used most infamously during the Nazi Holocaust in some gas chambers.
Zyklon-B
Alternative form of Zyklon B
Zyklon-B
By Dr. Robert Jay Lifton Although Zyklon-B pellets were used in the gas chambers to exterminate large groups of people, the Nazis learned that extermination of smaller groups was more economical by injection of each victim with phenol. Source: Internet
Commandant Höss reported that the gassed victims "showed no signs of convulsion"; the Auschwitz camp physicians attributed that to the "paralyzing effect on the lungs" of the Zyklon-B gas, which killed before the victim began suffering convulsions. Source: Internet
The crystals were made to order by the IG Farben chemicals company for which the brand name was Zyklon-B. Source: Internet