Which UN hazard class deals with oxidizers?

The correct classification for oxidizers is found in Class 5 of the UN hazard classes. Specifically, Class 5 is divided into two divisions: Division 5.1 deals with oxidizing substances, which are materials that can cause or enhance the combustion of other materials by supplying the necessary oxygen. This class is crucial because oxidizers can significantly increase fire risks and change how materials behave when involved in a fire scenario.

Understanding the nature of oxidizers is vital for first responders and those working with hazardous materials, as these substances can present severe dangers not only in fires but also through reactions with flammable and combustible materials. The classification helps in identifying the appropriate precautions, handling procedures, and storage conditions required to minimize risks associated with these materials.

The other hazard classes focus on different types of materials. Class 1 is dedicated to explosives, Class 3 relates to flammable liquids, and Class 4 covers flammable solids, spontaneously combustible materials, and dangerous when wet materials. Each of these classes is distinct from Class 5, emphasizing the unique dangers and handling protocols associated with oxidizers.