Which class of hazardous materials includes flammable liquids?

Class three hazardous materials specifically include flammable liquids, which are substances that can catch fire and burn easily when exposed to a heat source or flame. This classification encompasses a wide range of liquids, such as gasoline, diesel fuel, and certain solvents, all of which pose risks during transport and storage due to their ability to ignite. Understanding this classification helps first responders prioritize safety measures when dealing with incidents involving flammable liquids, as they require particular attention to prevent fires and explosions.

The other classes do not encompass flammable liquids: Class one pertains to explosives; Class two includes gases, which can be flammable or non-flammable; and Class four is associated with flammable solids, which are different from liquids.