Thalmerite

Thalmerite was a highly explosive compound. It is not known if Federation starships carried or replicated the substance when needed.

The Klingon vessel was destroyed by a thalmerite explosive device that Hon-Tihl placed near its reactor core shortly after its passage through the Bajoran wormhole. 

In 2371, the USS Voyager placed forty tons of thalmerite in a shuttlecraft prior to its anticipated capture by a Numiri patrol ship. Captain Kathryn Janeway threatened to detonate the explosive which would have destroyed the shuttle and Numiri vessel unless the shuttle was immediately released.