Sarin is a nerve agent
Sarin is a dangerous nerve agent that was developed by the Nazis in the 1930s. Originally it was made as a pesticide. Both the Germans and the Allies had sarin in their possession, but it was never used on the battlefields. By inhalation of sarin, the muscles paralyze around the lungs, causing you to drown in your own mucus. Also a small amount can be lethal. Sarin paralyzes also other body parts, probably a dose of less than 1 milligram is already lethal to humans.