For dry ice to be acceptable for flight, it must be limited to how many pounds per container per passenger, and what labeling must accompany it?

• A. 2 pounds per container, per passenger, with no labeling
• B. 5.5 pounds per container, per passenger, in carry-on or checked luggage, and must indicate carbon dioxide or dry ice on exterior with Class 9 label
• C. 10 pounds per container, in any luggage, with Class 7 label
• D. 7 pounds per container, per passenger, with no label

Answer: (B)

Understanding how much dry ice you can bring and how it must be labeled helps keep everyone safe during flight. Dry ice (frozen carbon dioxide) sublimates to gas, which can build up pressure and reduce cabin air quality if not handled properly. To manage this, airlines limit the amount per passenger per container to 5.5 pounds, and it may be placed in carry-on or checked luggage. The packaging must be clearly labeled on the exterior to show it contains carbon dioxide or dry ice, and it must carry the Class 9 label, indicating miscellaneous dangerous goods. This labeling informs handlers and crew to treat the package accordingly and ensure there’s proper venting and storage.