Canister of chlorine trifluoride
Chlorine trifluoride (ClF3) was a green-colored chemical compound that could be used to boost propulsion via an exothermic reaction. It was illegal in most parts of the galaxy.
While fleeing Denaxi Depot with the crew of the USS Protostar in 2384, Thadiun Okona found a canister of chorine trifluoride in a compartment of their cargo trolley, which enabled them to outrun their Xindi-Reptilian pursuers. (PRO: "Crossroads")