Which hazard classification indicates radioactive materials?

Class 7 is the hazard classification that specifically indicates radioactive materials. This classification is part of the United Nations system for the transport of dangerous goods, which categorizes materials based on their inherent risks. Radioactive materials are considered hazardous due to their potential to emit ionizing radiation, which can be detrimental to health and the environment.

Class 7 encompasses a variety of radioactive substances, including those used in medical applications and industrial processes. These materials require special handling, packaging, and transportation procedures to ensure safety during transit, reflecting the serious nature of their potential hazards.

In comparison, other classes do not pertain to radioactive substances. Class 1 refers to explosives, Class 3 pertains to flammable liquids, and Class 9 is assigned to miscellaneous hazardous materials that do not fit into the other defined classes. Understanding the classifications and their implications is essential for ensuring compliance with safety regulations when dealing with hazardous materials.