Widely used as a riot control agent due to its strong irritant properties. It causes temporary effects such as tearing, coughing, and discomfort in the eyes, skin, and respiratory system, making it effective for crowd control. Commonly deployed in the form of sprays or grenades by law enforcement and military personnel. Also used in the synthesis of certain organic compounds and pharmaceuticals as an intermediate. Its volatility and reactivity make it suitable for use in self-defense products, though its use is regulated in many countries due to health and safety concerns.