Compliance Navigator: IATA and DOT Standards for Dry Ice Shipping

A package designed and labeled for shipments using dry ice as a refrigerant, commonly used for frozen goods and biological materials.

Carbon Dioxide, Solid (UN 1845)

commonly called dry ice, is regulated as a hazardous material because it sublimates to gas and can create asphyxiation and pressure risks. Shippers moving dry ice must comply with both international air rules (IATA Dangerous Goods Regulations) and national ground/air rules (U.S. DOT 49 CFR for shipments originating in or transiting the United States). Compliance protects carrier acceptance, crew and ground personnel safety, and avoids substantial fines or shipment rejection.

Core classification and identification

• Legal identification: dry ice is identified by the proper shipping name “Carbon dioxide, solid” and the UN number UN 1845.
• Hazard class: it is normally handled as a Class 9 (miscellaneous) dangerous good because its primary hazard is as a suffocation and pressure-building refrigerant gas.
• Documentation: shipments must include the proper shipping name, UN number, hazard class, and quantity. For air transport, a shipper’s declaration for dangerous goods may be required unless the consignment qualifies for allowed exceptions or limited quantities under IATA.

Critical air-transport requirement — net weight in kilograms

One of the most important regulatory and practical requirements for air carriage is that the shipper must state the net weight of dry ice in each package in kilograms on the air waybill and on any required dangerous-goods documentation. Airlines and the IATA DGR require a clear net weight declaration (kg) so the operator can assess the total gaseous CO2 volume that will be produced in flight and determine acceptance, stowage, and whether the shipment may be carried on passenger or cargo aircraft only. Failure to declare net weight in kilograms on the air waybill is a common cause of refusal by carriers and a serious safety risk.

Labeling and marking

• Packages must be marked with the proper shipping name and UN number (e.g., CARBON DIOXIDE, SOLID, UN 1845).
• Packages require the Class 9 hazard label (miscellaneous dangerous goods). When applicable, packages must bear the special handling label indicating “Cargo Aircraft Only” if the shipment is restricted by the operator or IATA provision.
• Include a label or marking indicating the net weight of dry ice in kilograms per package, and the words “Dry ice” or “Carbon dioxide, solid” on the outer packaging.

Packaging and handling requirements

• Ventilation: because dry ice sublimates to CO2 gas, packaging must permit gas to vent to avoid pressure build-up. Do not use hermetically sealed containers.
• Container strength: choose packaging that can support the payload at the intended temperature and handling stress; many shipments use insulated boxes with vented outer cartons.
• Package limits: IATA and DOT limit quantities per package for passenger vs cargo aircraft and may allow reduced documentation for small limited quantities. Always verify applicable per-package limits in the current regulations and with the carrier.

Documentation and carrier acceptance

• Air waybill: must include the net weight of dry ice in kilograms for each package and preferably the total for the shipment; the shipper must ensure the waybill references the UN number and proper shipping name when required.
• Shipper’s declaration: required when the consignment does not meet the criteria for exceptions or limited quantity provisions. Complete and accurate declarations, including emergency contact information, are essential for carrier acceptance.
• Operator variations: airlines may impose additional restrictions or require advance approval. Always check with the carrier before tendering dry ice to ensure acceptance and any carrier-specific paperwork.

Training and compliance program requirements

• Regulations require that personnel who prepare, offer, or handle dangerous goods shipments receive appropriate training in identifying hazards, marking/labeling, packaging, documentation, and emergency procedures.
• Maintain training records as required by IATA/DOT and refresh training at mandated intervals.

Safety and emergency information

• Include an emergency contact telephone number that is reachable 24/7 on the shipping papers for hazardous shipments.
• Provide handling instructions: avoid confined space exposure, ensure adequate ventilation during unpacking, and use personal protective equipment (gloves, eye protection) to prevent cold burns.

Best practices

• Always declare the net weight of dry ice in kilograms on the air waybill and any dangerous-goods paperwork.
• Use vented, robust outer packaging specifically designed for dry ice carriage and clearly mark package contents and hazards.
• Confirm airline/operator acceptance and any special handling or quantity restrictions before tendering shipment.
• Keep current copies of IATA DGR and 49 CFR guidance available and consult them for quantity limits, exceptions, and packaging instructions that may apply.
• Document and retain records of training and shipment paperwork to support audits and inspections.

Common mistakes to avoid

• Failing to declare the net weight in kilograms on the air waybill—this is a frequent cause of rejection and safety risk.
• Sealing packages so gases cannot vent, creating pressure hazards.
• Not checking carrier-specific rules; assuming all airlines accept dry ice under identical conditions.
• Insufficient training of staff preparing shipments or incomplete emergency contact information.

Real-world example

A laboratory shipping biological samples chilled with dry ice must mark the outer package with “Carbon dioxide, solid, UN 1845,” affix the Class 9 label, list the net weight of dry ice in kilograms per package on the air waybill, and either provide a shipper’s declaration or confirm the shipment qualifies for a limited-quantity provision. The shipper must verify the receiving airline accepts the quantity and type of packaging, and ensure staff have current dangerous-goods training.

In summary, shipping dry ice safely and legally requires correct identification (UN 1845), use of Class 9 hazard labeling, packaging that allows venting, explicit declaration of net weight in kilograms on the air waybill, proper documentation, trained personnel, and carrier acceptance. Follow IATA DGR and U.S. DOT 49 CFR requirements and consult carriers for operator-specific limits to maintain safety and regulatory compliance.