Gen Hoffman watched as 18,000 gas shells rained down on the Russian lines, each one filled with the chemical xylyl bromide, an early form of tear gas. But the results left him disappointed.

In January 1915 another effort, that time using irritant xylyl bromide, was fired at Russian troops in Bolinow, but cold weather kept the liquid from vaporizing.

Responding to an American Civil Liberties Union (ACLU) lawsuit against the City of St. Louis, a federal judge has limited St. Louis police response to protests, issuing a preliminary injunction ...

And on 31 January 1915, the Germans let loose almost 20,000 bombs containing liquid xylyl bromide tear gas upon entrenched Russian soldiers during the Battle of Bolimov, Poland.

The first tear gas, used in World War I, was made from a compound called xylyl bromide. While tear gas often does not result in lasting damage, it can be dangerous to children, ...