Auto Ignition Temperature of Liquids

The auto ignition temperature (AIT) of liquid or gas is the lowest
temperature at which a fuel-air mixture will spontaneously ignite at
specified test conditions. See ASTM E659.

AIT tests are conducted according to ASTM E659 Standard Test
Method for Auto-ignition Temperature of Liquid Chemicals.  The test
procedure employs a 500 ml flask that is uniformly heated in a special
purpose furnace. A fine thermocouple in the flask is used to monitor
temperature changes that occur upon injection of a small quantity
of fuel into the flask.  The test temperature is progressively lowered
until ignition does not occur within 10 minutes at any fuel concentration.

Sample size: 250 ml