Tear gas powder should be regarded as a poison in the strict sense. It is made of a chemical substance that stimulates tearing, which can stimulate the sensory nerve endings of the eyes, nose, throat and skin, and can make people quickly experience tearing, runny nose, eye pain, sneezing, coughing, nausea, vomiting, chest pain, Symptoms such as headache and skin burning, loss of normal behavior and hinder their actions. Smoke grenades containing tear gas are used by police around the world and fired in the form of jets or grenades.
There are three types of tear gas with the longest history: brominated xylene, chloroacetophenone (CN for short) and o-chlorobenzylidene malononitrile (CS for short). Among them, CN is the most toxic, so most of them have been replaced by CS irritant powder which is used for tear gas bombs. In addition to CS preparations, other preparations have also been widely used in recent years, such as pure natural oleoresin capsicum powder (referred to as OC, the advantage is that it has no permanent killing effect). You can't imagine this stuff getting so powerful on your eyes.
The composition of tear gas bombs commonly used by the police is more than just tear gas. It also contains certain combustion components to produce high temperature enough to vaporize the poison. The tear gas CS powder is a solid powder at room temperature. In order for CS power to spread like a gas, other components, such as dichloride, which is easy to volatilize, need to be added. Methane, let it diffuse in the air with CS irritant powder. In addition, high temperature also contributes to gas dispersion, so other chemicals such as magnesium nitrate will also be added to the tear gas to generate high temperature and accelerate the diffusion of CS gas powder. This is why you should not pick up the tear gas that has just landed with bare hands, or you may get burned.
In the past, there was also an explosive tear gas bomb, which directly used a blast tube to walk the tear gas component out. The effect was extremely fast, but it has been abandoned because it is easy to injure people. The three words "tear gas" can make people misunderstand that it only has a tear gas effect, but in fact, tear gas powder stimulates the body surface mucosa, but the mucous membranes such as the eyes, nose, and mouth are more susceptible to chemical stimulation, secreting a lot of mucus.
