Chloroacetophenone (CN gas) is commonly known as tear gas, a lachrymatory agent that causes severe eye irritation, tearing, and temporary blindness. LSD is a hallucinogenic drug, 'Dishlorodiethyl Sulphide' appears to be a misspelling of sulfur mustard (mustard gas), and TNT is an explosive. Tear gas is used for riot control and police operations.