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HC Smoke Grenades Use in US Protests 2020-2021

The use of hexachloroethane-containing smoke grenades against protesters in US cities, particularly Portland, during 2020-2021, and the associated health risks and regulatory concerns.

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Jan 17, 2026
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hexachlorathane gas used on protesters in the US?

Multiple independent reporting projects, environmental tests and city statements indicate hexachloroethane-containing “HC” smoke grenades were deployed against protesters in several U.S. cities during...