Tear Gas Is a Chemical Weapon Used to Disperse Crowds — Here’s How It Works and Its Risks

Key Takeaways on Tear Gas Tear gas is a chemical weapon also known as “demonstration control agents” (DCAs). It’s designed to disperse large crowds, typically in outdoor settings. Tear gas contains lachrymatory agents, including CS (2-chlorobenzalmalononitrile), CN (chloroacetophenone), and CR (dibenzoxazepine). DCAs work by activating a person’s nociceptive nerve fibers. Immediately, a person will feel…

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