At what flash point is a liquid considered flammable?

A liquid is considered flammable when it has a flash point of 100 degrees Fahrenheit or lower. The flash point is the lowest temperature at which a liquid emits enough vapors to ignite in the presence of an open flame or spark. Thus, liquids with flash points at or below this threshold can catch fire easily, making them a fire hazard.

In many safety regulations and standards, this definition is crucial for classifying substances and implementing appropriate storage, handling, and safety measures. Higher flash points indicate that the liquid requires a higher temperature to ignite, categorizing them as combustible rather than flammable. Therefore, while some of the other temperatures listed may indicate potential hazards, only a flash point of 100 degrees Fahrenheit or lower meets the criteria for flammability.