Flash point

The flash point of a material is the lowest temperature at which it gives off enough vapor to ignite in the presence of an ignition source. It is distinct from the fire point, the lowest temperature at which the vapor keeps burning once ignited, which is always somewhat higher than the flash point because more vapor is needed to sustain combustion than to merely ignite briefly. Flash point is also distinct from autoignition temperature, the temperature at which a material ignites on its own with no external ignition source at all. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/