Which class includes Radioactive Materials?

• A. Class 2
• B. Class 7
• C. Class 3
• D. Class 4

Answer: (B)

Radioactive materials have a dedicated hazard class because their primary danger comes from ionizing radiation, not from flammability or toxicity. In the HazMat classification scheme, this radiological hazard is grouped under Class 7. That’s why radioactive materials are handled, packaged, labeled, and transported with different rules than other hazards.

To put it in context, the other classes cover different hazards: gases (Class 2), flammable liquids (Class 3), and flammable solids (Class 4). These do not address radiation risks, so they are not the correct category for radioactive materials. Class 7 shipments follow specialized packaging standards (such as Type A or Type B packages), specific radiation labeling and placards, and sometimes additional regulatory requirements depending on the material and mode of transport.