JET A – 1 seems to have some additives added to the hydrotreated kerosene fraction. Additives are antioxidants, metal deactivators, antistatic agents, etc. Also, in order to satisfy the required performance of JET A-1, there are few aromatic hydrocarbons due to carbon accumulation, and important folding points are important for flying high altitude, and there are various regulations and it satisfies it It is manufactured as such. Heating kerosene contains a large amount of paraffinic hydrocarbons to increase combustibility, sulfur content to generate harmful sulfur dioxide gas is specified to be small. JET A – 1 is refined from the same kerosene fraction as kerosene, but after that it will be different depending on each application.