Which item is required on the Class 7 radioactive materials label that improves visibility of the hazard?

• A. Radioactive symbol only.
• B. Transport index only.
• C. Proper shipping name and UN number only.
• D. Radioactive symbol and transport index, proper shipping name, UN number, and appropriate DG labeling.

Answer: (D)

Labeling Class 7 radioactive materials is all about making the hazard clearly recognizable to anyone handling or responding to a shipment. To do this effectively, the packaging must convey at a glance that radioactivity is involved, how severe it is, and what specific material it is, so that proper precautions and regulatory steps can be taken.

The radioactive symbol signals that radioactivity is present, which alerts handlers immediately. The transport index adds a measure of the radiological hazard that helps determine safe handling, segregation, and emergency response considerations. The proper shipping name and UN number uniquely identify the material, linking to the regulatory requirements and the exact nature of the hazard. And following the appropriate dangerous goods labeling ensures the packaging meets standardized DG markings, reinforcing recognition and compliance across carriers and jurisdictions.

Combining all of these elements provides the clearest, most immediate understanding of the hazard, which is why this full, detailed labeling is necessary. If any of these pieces were omitted, important information would be missing—another element might signal the hazard but not identify the substance, or a symbol alone wouldn’t convey the specific material or regulatory details—so the complete set is required for maximum visibility and safe handling.