Which class is associated with explosives?

Class 1 is the correct classification for explosives according to the United Nations' system for classifying hazardous materials. This classification is specifically designated for materials that pose a risk due to their explosive properties. This includes items like dynamite, fireworks, and other materials that can undergo a rapid chemical reaction resulting in an explosion.

In contrast, the other classes are associated with different types of hazardous materials. Class 2 encompasses gases, which can be either compressed, liquefied, or dissolved under pressure. Class 3 includes flammable liquids, such as gasoline or alcohol, that can ignite easily and pose fire hazards. Class 4 relates to flammable solids, self-reactive materials, and those that can emit flammable gases upon contact with water. Understanding these classifications is crucial for safety and compliance in handling, storing, and transporting hazardous materials.