Types of Chemical Sprays Self-defense chemical sprays or tear gas, come is three general categories of active ingredients: CN, CS, and OC. CN, which is an abbreviation for chloroacetophenone was used by the military and police departments in the 60s and 70s, but is not used much anymore. This product is not really a gas, [...]The post A Closer Look: Pepper Spray & Self Defense appeared first on Bomar Security & Investigation.