Which of the following entries on shipping papers would indicate the presence of hazardous materials?

• A. A. Receiver's name and address
• B. B. Shipper's name and address
• C. C. Gross weight of material shipped
• D. D. UN/NA identification number

Answer: (D)

The presence of a UN/NA identification number on shipping papers is a clear indicator of hazardous materials. These identification numbers are critical components in the transport of hazardous substances, as they provide a standardized way to identify specific materials and their associated risks.

The United Nations (UN) numbers, for example, are assigned to individual hazardous substances, allowing responders to quickly understand what type of material is being shipped and what precautions should be taken in the event of an incident. This identification system enhances safety by enabling efficient risk assessment and emergency response planning.

In comparison, the other entries, such as the receiver’s name and address, shipper’s name and address, and gross weight of the material shipped, provide useful logistical information but do not specifically denote whether the contents are hazardous materials. Thus, while important for tracking and inventory purposes, they do not offer insight into the nature of the materials being handled.