What is the correct order of the four-step process used when packing and shipping dangerous goods?

• A. (1) Determine what mode of transport will be used; (2) Determine the classification of the substance; (3) Pack your material; (4) Label, mark and prepare package documentation
• B. (1) Determine the classification of the substance; (2) Determine what mode of transport will be used; (3) Label, mark and prepare package documentation; (4) Pack your material
• C. (1) Pack your material; (2) Determine what mode of transport will be used; (3) Determine the classification of the substance; (4) Label, mark and prepare package documentation
• D. (1) Label, mark and prepare package documentation; (2) Determine the mode of transport; (3) Determine the classification of the substance; (4) Pack your material

Answer: (A)

Beginning with the mode of transport sets the regulatory framework you’ll follow for that shipment. Different transport modes have distinct packaging rules, allowed materials, and required documentation, so knowing the mode upfront prevents choosing packaging or labels that aren’t approved for that mode. Once the mode is known, identify the substance’s classification to determine its hazard class, UN number, and packing group, which drives the specific handling and labeling requirements. With the hazard clarified, you can select and apply the correct packing method and materials to protect the goods during transit. Finally, label and mark the package and prepare all documentation (shipping paper, emergency contact, etc.) so the shipment is properly identified and compliant at every handoff. This sequence minimizes the risk of incompatible packaging, incorrect labeling, or missing paperwork.