What is the primary hazard of a Hazard Classification System class 7 material?

The primary hazard of a Hazard Classification System class 7 material is radiation. Class 7 materials specifically pertain to radioactive substances, which emit ionizing radiation that can pose significant health risks to humans and the environment. This radiation can lead to acute health effects, such as radiation sickness, as well as long-term effects, including increased cancer risk. Understanding this classification is crucial for emergency responders and safety professionals, as it dictates the necessary precautions and response strategies to mitigate the hazards associated with radioactive materials. The other classifications, while critical in their own right, do not encompass the dangers associated with radiation emitted from class 7 materials.