Which HAZMAT class is related to flammable liquids?

The class that pertains to flammable liquids is Class 3. This classification is part of the United Nations' system for the transport of dangerous goods. Class 3 materials are defined specifically as those that have a flashpoint of not more than 60.5 °C (or 141 °F), making them capable of ignition under relatively moderate conditions. Common examples of Class 3 substances include gasoline, oil, and many types of alcohol, all of which pose a fire hazard due to their volatility and capacity to produce flammable vapors.

Classes 5, 6, and 7 denote other categories of hazardous materials. Class 5 includes oxidizers and organic peroxides, which can enhance combustion. Class 6 pertains to toxic substances and infectious materials, focusing on health risks rather than flammability. Class 7 is designated for radioactive materials, which involve entirely different hazards associated with radiation rather than fire. Thus, Class 3 is distinctively tied to the properties and risks associated with flammable liquids.