What type of materials are classified as 'explosives' in HAZMAT regulations?

Materials classified as 'explosives' in HAZMAT regulations are defined as those that can undergo a rapid chemical reaction, resulting in the production of gas and heat. This characteristic is essential in classifying substances as explosives because it reflects their potential for causing a violent release of energy. Explosives can create pressure waves that can have devastating effects, making it crucial to regulate and handle them appropriately within transportation and storage frameworks.

In contrast, the other categories mentioned do not fit the definition of explosives. Non-toxic but irritating materials typically refer to substances that may cause discomfort without being harmful. Flammable liquids, while they can ignite easily, do not inherently produce the rapid reactions characteristic of explosives. Corrosive materials can cause destruction by chemical action but do not involve the rapid release of gas and heat in the same explosive manner. Understanding these distinctions helps ensure safe handling and compliance with regulations regarding hazardous materials.