What agent classified as non lethal irritates skin eyes and inside of mouth?

A common non-lethal agent that irritates the skin, eyes, and inside of the mouth is pepper spray, which typically contains capsaicin, the active component derived from chili peppers. It is designed to cause temporary discomfort and incapacitation by inducing intense burning sensations and tearing. Other examples include tear gas, such as CS gas, which can also cause similar irritations. These agents are often used for crowd control or self-defense.