Anicium

Anicium was a substance which, combined with yurium, could produce a powerful explosion.

During his scheme to commandeer the USS Discovery using temporal loops, Harry Mudd destroyed the ship in one of the loops using an anicium-yurium reaction. 

Bela Tyken used anicium and yurium from his cargo to create a massive explosion and free his ship from a Tyken's Rift. 

Anicium アニシウム