Nitro-9

Nitro-9 was an explosive created by Ace in school, where she blew up the science building with it. Ace mixed it herself and put it inside deodorant cans.

Nitro-9 was a variant of Nitroglycerin and a variant of Nitro-9 was Nitro-9a, which was half the size and half as powerful. (NA: Timewyrm: Exodus)

Though the Doctor told Ace not to carry it, she continued to do so and used it to destroy a Cyber-shuttle (DW: Silver Nemesis) and to open the entry for King Arthur's spaceship. (DW: Battlefield)