KO Pepper Spray 100ml -Available in Fog Spray. Pepper spray also known as OC spray (from Oleoresin Capsicum) OC gas and capsicum spray is a lachrymatory agent (a chemical compound that irritates the eyes to cause tears pain and even temporary blindness) that is used in riot control crowd control and personal self-defence including defence against dogs and animals. Its inflammatory effects cause the eyes to close taking away vision. This temporary blindness allows officers to more easily restrain subjects and permits persons using pepper spray for self-defense an opportunity to escape.