Jet A-1 is the standard international grade of commercial aviation turbine fuel (jet fuel).

Jet A-1 has a lower freeze point than Jet A (the grade commonly used in the US), which is better suited to high altitude intercontinental flights, especially over polar regions.

Jet A-1 fuel must meet the following standards:

DEF STAN 91-91

ASTM specification D1655

IATA Guidance Material (Kerosene type), NATO Code F-35

Some physical properties for Jet A-1 within ASTM specification D1655:

Flash point: 38 degrees C

Freezing point: -47 degrees C

Density at 15 degrees C: 0.804 kg/l