How should hazardous materials be marked?

Answer: B — With the proper shipping name and UN number on the outside of the package

Hazardous materials must be clearly marked with the proper shipping name and UN number displayed on the exterior of the package. This is crucial for ensuring that anyone handling the materials—whether during transport, storage, or in the event of an emergency—can easily identify the nature of the hazardous contents. The proper shipping name provides a clear description of the material, while the UN number is a unique identifier that corresponds to specific regulations and handling procedures associated with that substance. The clarity and specificity provided by the shipping name and UN number are essential for safety and compliance in transportation. This marking helps emergency responders take appropriate actions if there is a spill, accident, or other emergency scenarios involving the hazardous material. Therefore, accurate marking with both the proper shipping name and the UN number is a legal requirement that enhances safety for people and the environment during the transport of hazardous materials.