A chemical explosive.
Throwable capsule containing several chemical substances. When the capsule hits a target, the chemicals inside it mix to produce a corrosive gas. While the gas is airborne, it slowly eats away nearby objects.

Because it destroys biomatter as well as machines, it has been classified as a highly dangerous weapon, banned from use by international treaty. However, as circumstances worsened, its use was permitted under special exemption only during wartime.