Which of the following shipping paper descriptions for a hazardous material is correctly ordered?

The first option provides the shipping paper description in the correct order as prescribed by the regulations. For hazardous materials, the standard order for shipping descriptions is to state the proper shipping name first, followed by the hazard class or division, and then the UN number. In this case, "Hydrogen bromide" is the proper shipping name, "non-flammable gas" describes its class or division, and "UN 1048" is the associated UN number.

This order ensures clarity and allows anyone reading the shipping papers—such as transporters, emergency responders, or regulatory agencies—to quickly identify the material and its associated hazards. The other options do not follow this standard structure, making them incorrect in terms of proper shipping paper descriptions for hazardous materials. Understanding this order is crucial for compliance with DOT regulations and for the safe transportation of hazardous materials.