What is the rule for shipping dry ice under IATA DGR?

• A. Dry ice is treated like any regular packaging.
• B. Dry ice must be shipped only in bulk containers.
• C. Dry ice has its own UN number, labeling and packaging requirements; shipments must account for sublimation of CO2.
• D. Dry ice requires no labeling.

Answer: (C)

Dry ice is solid carbon dioxide, and shipping it under IATA DGR is treated as a hazardous material because it sublimates to gas as it warms. That behavior creates internal pressure and potential oxygen displacement, so it requires special handling: the package must carry the correct identification, including its UN number and Class 9 designation, and it must be labeled and packaged to reflect the hazard. The standard rule is that dry ice has its own UN number (1845) and specific labeling and packaging requirements, and shipments must account for sublimation to CO2 gas during transit. This means you can’t treat dry ice as ordinary packaging, you must use the proper hazmat labeling, and you must plan packaging to accommodate gas release so there’s no leakage or pressure buildup. The other options miss these critical protections: regular packaging isn’t sufficient, bulk containers aren’t the only permitted form, and labeling is required, not omitted.