Which class of hazardous materials includes substances with the potential to explode?

The class of hazardous materials that includes substances with the potential to explode is indeed explosives. Explosives are defined as materials that can undergo rapid chemical reactions, producing gas and heat, which can lead to a violent release of energy. This category includes a variety of substances, such as dynamite, fireworks, and certain types of ammunition.

Understanding the properties of explosives is crucial for safe handling and emergency response. This class is specifically designed to deal with their unique hazards, emphasizing the need for proper storage and transport to minimize the risk of accidental detonation. The other classifications, such as flammable liquids, corrosive materials, and radioactive materials, refer to different types of hazards and do not inherently possess explosive characteristics.