What is the flash point of a solvent?
A)The minimum temperature at which a vapor will spontaneously ignite
B)When the temperature exceeds the boiling point of the solvent
C)The minimum temperature at which a vapor will spontaneously ignite and when the temperature exceeds the boiling point of the solvent
D)When the vapor pressure of a solvent equals its lower flammability limit (LFL)

Question

Quizplus · Accepted Answer

The flash point of a solvent is the minimum temperature at which it forms a vapor above its surface in sufficient concentration that it can be ignited in the air. This is not the temperature at which it will spontaneously ignite (that's the autoignition temperature) or necessarily when it exceeds its boiling point. The definition most closely aligns with when the vapor pressure of the solvent reaches a level where it meets its lower flammability limit, meaning there is enough vapor to sustain a flame if an ignition source is present.

What Is the Flash Point of a Solvent