Uphalafini, i-fuel distilled, ibonisa uhla lwengxenye ye-distillation ye 180 ku 300, ehambisana nokuntengantenga okuphakathi naleyo kaphethiloli wezimoto kanye nowoyela wedizili omncane. Ayinazinhlanganisela ezisindayo ze-hydrocarbon.
Indawo yokubilisa kaphalafini isuka 110 ku 350 amadigri Celsius, ukumaka izici zayo ezihlukile ezishisayo.