What is the first step in the recommended hazmat shipment preparation sequence?

• A. Identify the material's hazard class and packing group.
• B. Label and mark.
• C. Seal outer packaging.
• D. Classify material.

Answer: (D)

Classification is the first step because it establishes the regulatory footing for the shipment. Through classification you determine the material’s hazard class, packing group, and the proper shipping name (including any subsidiary risks). This information then drives everything that follows: choosing the correct packaging, applying the right labels and markings, and preparing the required documentation. Without a formal classification, you wouldn’t know which packaging requirements to meet or which labels and paperwork are appropriate, so subsequent steps cannot be done correctly. The other actions—identifying hazard class and packing group, labeling and marking, sealing outer packaging—depend on the results of classification, which is why this step comes first.