Zyklon B was hydrogen cyanide and used in small, closet sized boxes for delousing protocols. Hydrogen cyanide is a blood agent that binds more tightly to hemoglobin than oxygen causing the classic bluing of the skin because you're suffocating. It's also explosive in concentrations high enough to kill. So ... not really just a bug-spray.
Zyklon B was hydrogen cyanide and used in small, closet sized boxes for delousing protocols. Hydrogen cyanide is a blood agent that binds more tightly to hemoglobin than oxygen causing the classic bluing of the skin because you're suffocating. It's also explosive in concentrations high enough to kill. So ... not really just a bug-spray.
Wrong.
My training in the US Army's NBC MOS disagrees with you.
Then why didn't it kill everyone in the delousing chamber?