The flash point of a flammable liquid is the lowest temperature at which there will be enough flammable vapor to ignite when an ignition source is applied. Unlike flash points, the autoignition temperature does not use an ignition source. ... As a result, the autoignition temperature is higher than the flash point.

What is the difference between fire point and autoignition temperature?

Fire Point: The temperature at which the fluid will sustain a fire if ignited by an outside ignition source. ... Auto Ignition: The minimum temperature at which a fluid will spontaneously ignite without an external ignition source, such as a flame or spark.

What's the difference between flashpoint and ignition point?

Open cup flash point testing occurs when the substance is placed into a vessel which is open to the outside atmosphere. Its temperature is then gradually raised, and an ignition source is passed over the top of it at intervals. Once the substance “flashes” or becomes ignited, it has reached its flash point.