Which class of hazardous materials includes oxidizers and organic peroxides?

The correct classification of hazardous materials that includes oxidizers and organic peroxides is indeed Class 5. This class is specifically designated for oxidizing substances and organic peroxides, which can promote or initiate combustion in other materials and pose significant risks during transportation and handling.

Oxidizers in this class are substances that can yield oxygen readily to stimulate the combustion of organic materials, while organic peroxides are a varied group of substances characterized by the presence of a peroxide functional group, which can result in explosive reactions under certain conditions. The importance of understanding Hazmat classifications lies in ensuring the proper handling, storage, and transportation of these materials to prevent harmful incidents.

The other classifications mentioned do not pertain to oxidizers and organic peroxides. Class 4 deals with flammable solids and materials that are self-heating, while Class 6 covers toxic and infectious substances. Class 7 is reserved for radioactive materials, which also do not involve oxidizing substances or organic peroxides. This differentiation is crucial for law enforcement and emergency responders when dealing with hazardous materials in various situations.