What type of substances are identified as Class 5 hazardous materials?

Class 5 hazardous materials are identified as oxidizing substances, which play a crucial role in combustion reactions. These materials enhance the combustion of other substances, making them more susceptible to catching fire. Oxidizers can react with various materials, including flammable solids and liquids, increasing the risk of fire and explosion.

Understanding the nature of oxidizing substances is essential for safety and emergency response. When handling these materials, it's important to recognize their potential to escalate fire hazards by providing additional oxygen to a fire. This characteristic distinguishes them from the other options, such as flammable solids and liquids, which are classified into different hazard classes due to their primary ignition properties rather than their oxidizing capabilities.