Which class of liquids includes Class I A, I B, and I C?

The classification of liquids into classes is based on their flash points, which determine how easily they can ignite and combust. Class I liquids are specifically categorized as flammable liquids because they have low flash points, meaning they can catch fire easily under normal temperatures.

Class I A liquids have flash points below 73°F (approximately 22.8°C), Class I B liquids have flash points below 100°F (approximately 37.8°C), and Class I C liquids have flash points between 100°F and 140°F (approximately 37.8°C to 60°C). This range illustrates their propensity to ignite and burn when subjected to a source of ignition.

Understanding this classification is crucial for ensuring proper safety measures and handling procedures when working with these types of liquids, as they pose significant fire hazards. Knowing that these are flammable liquids helps guide regulatory practices and safety protocols in various environments, including industrial and residential settings.