【How-to】What is ccl2o - Howto.org

Phosgene, which smells like moldy hay, is also an irritant but six times more deadly than chlorine gas. … Mustard gas, a potent blistering agent, was dubbed King of the Battle Gases. Like phosgene, its effects are not immediate. It has a potent smell; some say it reeks of garlic, gasoline, rubber, or deceased horses.