In DGR shipments, how is dry ice treated and documented?

• A. It is a Class 9 hazard and must be properly documented, labeled, and packaged according to the PI and SPs.
• B. It is not hazardous and requires no special documentation.
• C. It is a Class 2 gas and requires simple labeling.
• D. It can be shipped without labeling if small amounts are used.

Answer: (A)

Dry ice is treated as a hazard in air shipments because it releases carbon dioxide gas as it sublimates, which can displace oxygen in enclosed spaces. That risk puts it in Class 9: Miscellaneous Dangerous Goods, UN 1845. Because of that classification, every package containing dry ice must be packaged to UN specifications, properly labeled to indicate that it contains dry ice, and documented with the appropriate dangerous goods paperwork, following the relevant Packing Instructions and Special Provisions for dry ice. This ensures the shipment is handled safely and that carriers and handlers are aware of the hazard and the amount of dry ice involved. The other statements miss the hazard status or the required protections: dry ice is not non-hazardous, it is not Class 2, and even small amounts still require proper labeling and documentation under the applicable PI and SPs.