autoignition temperature

autoignition temperature (plural autoignition temperatures)

1. The lowest temperature at which combustion will occur spontaneously under specific conditions.
   • 1968 April 18, National Transportation Safety Board, “1.15 Tests and Research”, in Aircraft Accident Report: Mohawk Airlines, Inc., BAC 1-11, N1116J, Near Blossburg, Pennsylvania, June 23, 1967‎, archived from the original on 24 June 2022, page 30:

     Skydrol is a fire resistant hydraulic fluid in accordance with the standards set forth in Aeronautical Material Specifications (AMS) 3150c. These specifications prescribe that the autogenuous^[sic] ignition temperature of such a fluid must be higher than 750°F. (399°C.), determined in accordance with certain testing procedures. Testing conducted by the manufacturer of Skydrol indicates that the flash point of that fluid is 180°C., the fire point is 215°C., and the autoignition point is 496°C. However, Skydrol exposed to air at elevated temperatures will undergo thermal decomposition and the flash, fire and autoignition temperatures will decrease by as much as 9°C.

   Synonym: ignition temperature