sarin

Phosphorous was selected by Mother Nature to be the element responsible for holding together all genetic material. As its phosphate form, it is the basis for life. But a small modification of phosphate will take that life away quite efficiently - Sarin. Oh, yes - it's time for The Dreaded Chemistry Lesson From Hell!
Navalny, a Russian anti-corruption activist and well-known critic of President Vladimir Putin, is being treated in Germany for an apparent case of poisoning by an "organophosphorus neurotoxin." But which one: the insecticide or the chemical weapon? Here are some clues.
A history professor at the University of Michigan claimed that carbon dioxide is deadlier than Sarin gas. Although it seemed implausible to the Council's chief chemist, the prof's claim was even more false than we imagined. The things you learn.