Boronite

Boronite was a standard explosive, roughly nine times more powerful than dynamite, used by Earth's far-flung human colonies. Boronite contained ammonium nitrate and reduced nitroglycerine to make its explosions less dangerous.

The early settlement of Trenzalore used boronite to explode bedrock in order to reach underground hot springs. The leftover boronite was shelved and later on Tiberius Gluck took some for his personal use in the Outland. (PROSE: Strangers in the Outland)