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Use of Hexachloroethane Smoke Grenades in 2020 US Protests

The use of hexachloroethane smoke grenades by federal forces during US protests in 2020, specifically in Portland, and the associated health and environmental risks.

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Jan 16, 2026
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Hexachloroethane (HC) smoke grenades used in operation metro surge

The available reporting shows documented use of hexachloroethane (HC)–type smoke grenades by federal forces during U.S. protest operations in 2020—most thoroughly documented in Portland—while official...