When labeling hazmat packaging, labeling must reflect which elements?

• A. The UN number, proper shipping name, and hazard class; packaging must match as well.
• B. Labeling must reflect only the hazard class.
• C. Labeling is a carrier preference.
• D. UN number is optional for labeling.

Answer: (A)

Labeling hazmat packaging must clearly communicate what the shipment is and what hazards it poses. The UN number identifies the material uniquely across international and domestic systems, the proper shipping name standardizes how it’s described so everyone uses the same term, and the hazard class indicates the general type of danger (for example, flammable, toxic, corrosive). The label should reflect all of these elements and the packaging must be consistent with them; if the label or packaging contradicts the shipping name, UN number, or hazard class, handlers and emergency responders could misjudge the risk. This isn’t a matter of carrier preference, and the UN number isn’t optional—the labeling and packaging must align with the material’s classification and the official shipping papers.