What does NFPA classify as a combustible liquid?

The National Fire Protection Association (NFPA) classifies a combustible liquid as one that has a flash point of 100°F or higher. This classification is important because it helps establish the hazards associated with handling and storing various liquids. Understanding flash points allows for the appropriate safety measures to be implemented, as liquids with higher flash points are generally considered less hazardous compared to those with lower flash points.

In contrast, options that refer to liquids with a flash point below 100°F are classified as flammable liquids, which pose a greater risk of ignition at lower temperatures. The definitions of ignitability or spontaneous combustion are broader and do not specifically align with the NFPA's classification criteria, which is focused strictly on the established flash point threshold of 100°F for categorizing combustible liquids. Thus, the criteria for determining combustibility specifically hinges on the flash point measurement.