Which hazard class includes flammable liquids?

The hazard class that includes flammable liquids is Class 3. This classification is specifically designated for liquids that can easily ignite and sustain combustion. Flammable liquids are substances with a flash point below 100 degrees Fahrenheit (37.8 degrees Celsius), making them particularly hazardous due to their ability to form flammable mixtures with air.

Proper handling, storage, and transportation protocols are crucial for these materials to prevent accidents and ensure safety. Understanding the characteristics of Class 3 substances helps first responders and workers in related industries identify risks and implement appropriate safety measures.

The other options represent different classes of hazardous materials. Class 1 pertains to explosives, Class 5 is classified for oxidizers and organic peroxides, and Class 6 includes toxic and infectious substances. Each class has distinct properties and handling requirements, underscoring the importance of knowing the specific classifications.