Dry Ice for Pharmaceutical and Biotech Logistics

The role of dry ice in life-science work

Biologics, enzymes, antibodies, nucleic-acid reagents and tissue samples can change rapidly as temperature rises. Dry ice provides a portable low-temperature source where powered refrigeration is impractical and, unlike ordinary ice, does not create significant meltwater in the shipper.

Stability requirements differ widely. Some products need refrigeration, some freezing, some a temperature range of several tens of degrees below zero, and others require liquid nitrogen or dedicated ultra-low equipment. Confirm product instructions, stability studies, transport qualification and acceptance criteria before selecting dry ice.

Samples and reagents: protect traceability as well as temperature

Dry ice is commonly used for short-term storage or transport of nucleic acids, proteins, enzymes, antibodies, cell lysates and other materials needing frozen protection. It may also support temporary cooling, reaction pauses or pre-cooling for milling. In tissue research and biobanking, it can bridge the time between collection and laboratory receipt.

Use sealed, low-temperature-compatible, labelled inner packs with shock and compression protection. Do not allow dry ice to bear directly against plastic, glass or seals that may become brittle. Record a unique sample identifier, collection time, packing time, target range and any exception so the receiving laboratory can make a traceable assessment.

Qualify the transport route and monitor each shipment

The objective is not simply to add dry ice but to demonstrate that the planned route and duration keep the product within an acceptable range. Qualification normally considers pack-out confirmation, temperature mapping, maximum-duration testing and delay scenarios across seasons, load sizes, openings, transfers and final-mile delivery.

For dispatch, record the calibrated logger, starting dry-ice weight, shipper type, batch or shipment reference, packer, carrier and expected arrival. A temperature excursion should be assessed by the quality function using stability data, exposure time and batch information; replenishing dry ice does not by itself make material acceptable.

Use dry ice carefully in biological processes

In laboratory work, dry ice can temporarily lower sample temperature, slow enzymatic reactions, maintain frozen material or reduce heat during milling, crushing and aliquoting. It is a cold source, not a replacement for qualified freezers, aseptic practice or contamination controls.

For a dry-ice bath, use low-temperature-compatible vessels, keep the work surface dry and control splash, cracking and label loss. When organic solvents are involved, follow the laboratory chemical-safety system for compatibility, ventilation and waste. Control thawing according to the study plan to avoid misleading results from repeated freeze–thaw cycles.

Manage carbon dioxide and occupational safety

Small rooms, cold rooms, receiving areas and temporary storage spaces can accumulate carbon dioxide as dry ice sublimates. The gas is colourless and may not be noticed before it causes dizziness, breathing difficulty or an asphyxiation hazard. Work in well-ventilated areas and consider gas monitoring or local extraction where the volume and room conditions warrant it.

Use cryogenic gloves, eye protection and appropriate protective clothing. Keep dry ice out of sealed containers and open transport shippers in a ventilated place rather than inside a small room or vehicle.

Fit the work into the quality and compliance system

Relevant procedures may include route qualification, instrument calibration, document control, training, deviation investigation, supplier review and records retention. Cross-border material may also involve shipment declarations, privacy, chain-of-custody and import requirements. These responsibilities must be confirmed for the actual material and destination.

Do not imply a pharmaceutical grade, certification or transport qualification unless it has been formally confirmed. A practical procedure should make the required evidence, responsibilities and release decision clear before routine shipping begins.

Start with a controlled implementation path

Define the material, target range, worst-case route, qualified packaging, monitoring method and acceptance decision first. Pilot the design with representative conditions and retain the evidence before extending it to new seasons, lanes or product formats.

A repeatable process connects procurement, pack-out, courier handover, receiving inspection and quality review. That connection is more valuable than relying on a nominal dry-ice quantity or a generic shipping instruction.

Conclusion

Dry ice is a useful low-temperature tool for appropriate pharmaceutical and life-science applications, but it is never a universal temperature solution. Qualified packaging, calibrated monitoring, traceable records, ventilation and quality-led exception decisions protect both the material and the people handling it.