Eleton

Eleton was a type of blaster gas used from the High Republic Era until at least the Galactic Civil War. It could be compressed and carried inside small ampoules.

A small amount of the gas was used by Ambassador Ceeril to stage an assassination attempt against himself. Decades later, Rebel Alliance spy Cassian Andor carried eight ampoules of compressed eleton gas in his belt to quickly refill his blaster.