What is the classification for any liquid having a flashpoint below 100 degrees Fahrenheit?

A liquid with a flashpoint below 100 degrees Fahrenheit is classified as flammable. The flashpoint is the lowest temperature at which the vapor of a liquid can ignite when exposed to an open flame or spark. Flammable liquids are particularly hazardous because they can form ignitable mixtures with air at normal temperatures and pressures. This classification is important for safety protocols, especially in environments where such liquids are handled, as it necessitates specific storage and usage guidelines to prevent accidental ignition and fires.

In contrast, combustible liquids have a higher flashpoint, generally above 100 degrees Fahrenheit, meaning they do not ignite as easily at room temperature. Non-flammable liquids either do not ignite or require a significant amount of heat to ignite, which is not the case for flammable liquids. Volatile generally refers to the tendency of a substance to evaporate quickly; while all flammable liquids are volatile, the term is broader and does not specifically indicate the ignition risk associated with flashpoints. Thus, the distinction is critical for understanding safety measures in handling various types of liquids.