What is the highest classified hazard level?

The highest classified hazard level is Class 7. This classification pertains to radioactive materials, which pose significant risks to health and safety due to their potential to cause harm through radiation exposure. The classification system is designed to categorize materials based on the degree of risk they present. Radioactive materials are particularly hazardous because they can emit ionizing radiation, which can damage biological tissues and increase the risk of cancer and other health issues.

In contrast, the other classes mentioned—such as Class 4, Class 6, and Class 9—refer to different types of hazards. Class 4 materials typically include flammable solids or substances that are prone to spontaneous combustion, while Class 6 generally refers to toxic and infectious substances. Class 9 encompasses miscellaneous dangerous goods, which do not fit neatly into other categories but still require careful handling and management. None of these classifications surpass the risk level associated with Class 7 materials, making it the highest risk classification within this system.