Chakan oil is a volatile, though nontoxic, substance used by the Peacekeepers to fuel pulse weapons. Chakan oil is created by mixing tannot root with chemicals that are similar to the acids found in the Hynerian digestive system. The process is simple enough that Peacekeeper infantry have been known to teach it to primitive societies.
Because tannot root is not only edible, but somewhat palatable, chakan oil retains some of those characteristics. It is routine for those wielding pulse weaponry to test the levels of chakan oil by tasting the ammo clip of their weapon. The average size of a chakan oil clip allows for 500 energy discharges, but more advanced models which allow for 600 discharges or more have been created as well.
Chakan oil is mentioned in Farscape.