Florida heat is unforgiving on cold chain. A package that would arrive in Boston perfectly preserved can be a write-off in Miami if dry ice management is wrong by even a few hours. In 2026, with pharma direct-to-patient programs expanding, seafood imports growing, frozen food e-commerce hitting record volumes, and biotech research pushing more clinical samples across the country, the dry ice you put in your package is part of the product.
Why dry ice is the workhorse of Florida cold chain
Dry ice — solid CO2 — sublimates directly from solid to gas at -78.5°C (-109°F). It keeps frozen goods at well below freezing without any liquid water byproduct. That makes it ideal for:
- Frozen pharmaceuticals and biologics
- Cell and gene therapy components
- Clinical trial samples
- Frozen seafood, including value-add and ready-to-cook portions
- Frozen meat, poultry, and bakery products
- Specialty frozen meal kits and direct-to-consumer ice cream
- Lab reagents and diagnostic samples
The complication is that dry ice is regulated. UN 1845 is the proper shipping name and the rules for ground, air, and sea differ.
The regulatory picture you cannot ignore
Dry ice is classified as a Class 9 miscellaneous dangerous good when shipped by air. IATA DGR Packing Instruction 954 governs it. The shipper is responsible for:
- Using ventilated packaging that allows CO2 to escape
- Marking and labeling correctly, including the Class 9 hazard label, UN 1845, the net quantity of dry ice in kilograms, and proper shipper / consignee details
- Completing a Shipper’s Declaration (often substituted with the air waybill notation for Section II shipments depending on operator variation)
- Ensuring the net quantity per package does not exceed operator limits — typically 200 kg by passenger aircraft, 200 kg by cargo aircraft, more on certain operators
For ground transport, dry ice is regulated under 49 CFR but enjoys streamlined treatment when shipped in well-ventilated packages with proper marking.
For sea transport, dry ice falls under the IMDG Code with similar marking and packaging principles.
The takeaway: even though dry ice feels simple, the regulatory and operator-variation matrix has real teeth.
What can go wrong
We have seen every failure mode at least once:
- Sublimation underestimated. A package that should have arrived with 4 lbs of dry ice remaining is empty on receipt because the supplier under-iced for the transit time.
- CO2 buildup in trucks and aircraft. Improper ventilation can create a CO2 hazard for drivers, ground crews, or pilots.
- Acceptance refusals at the carrier counter. A missing label, an incorrect class, or wrong net quantity kills the shipment.
- Wet, soggy outer cartons. Almost always a sign that the shipper used water ice when they should have used dry ice, or used insufficient inner insulation.
- Customs paperwork on imports. Inbound frozen pharma and seafood require coordinated entry filing so the cold chain is not broken by a hold.
A serious dry ice partner is, fundamentally, an operations team that makes sure none of those failures happen on your watch.
What to look for in a 2026 dry ice partner
Hold any provider to the following standards:
- 24/7 availability — your shipments do not respect business hours
- Same-day local delivery of bulk dry ice with predictable density and quality
- Pre-tested validated shippers matched to your product, lane, and season
- IATA-current hazmat documentation for air shipments
- Cold chain monitoring — temperature loggers, optionally GPS, with simple post-delivery reports
- Surge capacity for clinical trial shipments and peak season
Cold chain failure is expensive. Validation is cheap.
How Go Freight runs dry ice for South Florida shippers
We supply dry ice on demand across South Florida, pair it with validated shippers, and integrate the dry ice step directly into our local delivery, warehouse, and air freight operations. Our hazmat team writes the Shipper’s Declarations and handles operator variations. Our drivers are trained in CO2 ventilation. For recurring programs we manage inventory at your facility so you never run out at 3 a.m. on a Sunday.
If you ship temperature-sensitive product through Florida — whether pharma, biotech, seafood, frozen food, or specialty — let us put a real dry ice program around it. The cost of doing it right is always lower than the cost of doing it wrong.