The Difference Of Boiling Point, Flash Point And Ignition Point

The boiling point of a liquid is the temperature at which the vapor pressure of the liquid equals the environmental pressure surrounding the liquid. A liquid in a vacuum environment has a lower boiling point than when the liquid is at atmospheric pressure. A liquid in a high pressure environment has a higher boiling point than when the liquid is at atmospheric pressure. In other words, the boiling point of liquids varies with and depends upon the surrounding environmental pressure.
The boiling point of a substance is the temperature at which it can change state from a liquid to a gas throughout the bulk of the liquid

The flash point of a flammable liquid is the lowest temperature at which it can form an ignitable mixture in air. At this temperature the vapor may cease to burn when the source of ignition is removed

The Ignition Point is the minimum temperature at which a substance will continue to burn without additional application of external heat