TEAR GAS
It is a chemical compound that stimulates the corneal nerves in the eyes to cause tearing,pain, and even temporaryblindness.The major constituent of tear gas is 2-(2-chloro-benzylidene)-malononitrile.
Tear gas is a chemical compound which, in humans, causes immediate tearing of the eyes, mild respiratory convulsion, an increase in blood pressure and pulse, as well as the irritation of mucous membranes. A lachrymatory agent or lachrymator (from lacrima meaning "a tear" in latin) (commonly referred to as tear gas) . These are commonly used as riot control agent and chemical warfare agents.
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