Which class in the UN classification system pertains to explosives?

The UN classification system categorizes hazardous materials into various classes based on their properties and hazards. Class 1 specifically pertains to explosives, which includes substances or articles that are designed to detonate or otherwise cause a sudden release of gas and heat. This class is further subdivided into divisions that cover different types of explosives, like those that are stable, those that are sensitive to initiation, and those that are intended for military applications. Understanding that Class 1 addresses all forms of explosive materials is crucial in the context of fire inspections and safety regulations, as it indicates the potential risks these materials pose and the necessary precautions that must be taken during storage, transport, and usage.