What is the primary distinction between combustible liquids and flammable liquids?

The primary distinction between combustible liquids and flammable liquids is based on their flash points. A combustible liquid is defined as one that has a flash point above 100 degrees Fahrenheit (37.8 degrees Celsius). This means that these liquids can ignite at elevated temperatures but require higher heat to do so compared to flammable liquids.

Flammable liquids, on the other hand, possess a flash point below 100 degrees Fahrenheit. This means they can produce enough vapor at lower temperatures to ignite and cause a fire hazard more easily than combustible liquids.

Understanding this classification is crucial for fire safety, prevention, and handling protocols, as it informs how these liquids should be stored and used in various environments. The correct answer reflects the essential characteristic of combustible liquids, making it clear why it is the right choice.