How a Solid Irritant Gets Into the Air
CS, the agent commonly meant by “tear gas,” is a solid at ordinary temperatures. When released, it is dispersed as tiny particles that float in air—an aerosol, not a gas in the strict chemical sense. Many deployment devices use a pyrotechnic charge to spread the material, though the delivery method can vary.
The distinction matters because the particles do not simply vanish after release. They can remain suspended, then settle onto clothing, skin, and nearby surfaces. Air movement may carry them beyond the spot where they were first dispersed, while contact with contaminated objects can prolong exposure.
Why the Eyes and Airways React
When CS particles reach moist surfaces such as the eyes, nose, mouth, or lungs, they trigger sensory nerves that normally warn the body about irritating chemicals. The result is a fast protective response: burning, tearing, coughing, and a sense of tightness or difficulty breathing. The tears and cough are the body’s reactions to the irritant; they are not evidence that the substance itself is a gas.
Because the active material travels as particles, exposure depends not only on how much is released but also on where those particles drift and settle. The practical implication is simple: a cloud may clear from view while residue remains on surfaces, so leaving the visible haze does not necessarily end contact.
