What is the difference between flash point and auto ignition in terms of their significance in fire safety measures?

The flash point is the temperature at which a substance can ignite and produce a flame, while auto ignition is when a substance ignites without an external flame or spark. In terms of fire safety measures, knowing the flash point helps determine the potential fire hazard of a substance, while understanding the auto ignition temperature can help prevent spontaneous combustion. Both are important factors in fire safety planning and prevention.