How is a volatile flammable liquid classified?

A volatile flammable liquid is classified as having a flash point below 100°F. This classification is crucial for safety standards and fire hazard prevention because liquids with a flash point below this temperature can produce enough vapor at room temperature to ignite when exposed to an open flame or spark. This characteristic makes them particularly hazardous in environments where ignition sources are present.

In contrast, liquids with a flash point above 100°F are typically classified as combustible rather than flammable; they are less likely to form ignitable mixtures at room temperature, which affects how they should be stored and handled. Non-combustible liquids do not ignite and burn, while solid materials at room temperature do not fall within the category of volatile liquids, as they cannot vaporize to create flammable vapors. Understanding these classifications is essential for adherence to safety protocols and compliance with the National Electrical Code.