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Wikipedia definition
1. Tear gasTear gas, formally known as a lachrymatory agent or lachrymator, is a non-lethal chemical weapon that stimulates the corneal nerves in the eyes to cause tears, pain, and even blindness. Common lachrymators include OC, CS, CR, CN (phenyacyl chloride), nonivamide, bromoacetone, xylyl bromide and syn-propanethial-S-oxide (from onions).
Read “Tear gas” on English Wikipedia
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