Veridium

Veridium is a substance with a variety of uses, primarily to manufacture explosives. It has a half-life of 70 hours.

In the late 2140s and early 2150s, the Malurians had a secret veridium mine on a planet with a pre-warp civilization, the Akaali. (ENT: "Civilization")

The cloaking devices used by the Ba'neth leave traces of veridium isotopes. In 2376, Naroq was able to use his photolitic converter to illuminate them while he was on the Delta Flyer, allowing a first glimpse into the morphology of a Ba'Neth. (VOY: "Riddles")

In 2377, Irina gave the Delta Flyer II a fuel converter rigged to leak veridium isotopes into the Warp Core. She intended for the resulting warp core breach to decimate those attenting the Antarian Trans-stellar Rally. (VOY: "Drive")