Small dry ice packs are transforming the way frozen and ultra cold products move through the supply chain. Glace sèche, ou dioxyde de carbone solide, stays at roughly –78.5 °C (–109,3 ° F) and sublimates directly into gas. Because there is no liquid phase, dry ice doesn’t soak packaging or food. These properties make it ideal for transporting vaccines, fruit de mer, ice cream and other perishables. When packed into compact, uniform bricks, a small dry ice pack reduces dead space and weight while delivering consistent cooling. In this guide you’ll learn how these miniaturised packs work, how to size them for your shipment, compliance rules, Conseils de sécurité, and the latest cold chain trends of 2025. À la fin, you’ll know whether a small dry ice pack is the right choice for your next shipment.
Why small dry ice packs provide uniform, mess free ultra cold temperatures for food and pharmaceuticals.
How to calculate the number of small dry ice packs needed for different payloads and transit times.
What regulations and safety measures apply to shipping small dry ice packs.
How small dry ice packs compare to gel packs or traditional ice in cost, longevity and temperature control.
The latest 2025 trends driving innovation in small dry ice pack design and sustainability.
Why Choose a Small Dry Ice Pack for Cold Chain Shipping?
Small dry ice packs are compact bricks or sheets of dry ice designed to fit snugly inside insulated boxes. Unlike pellets that roll around or large blocks that leave unused space, these packs hug the walls or lid of a container. Because dry ice sublimates directly from solid to gas, it leaves no liquid residue. This means your products stay dry and packaging isn’t weakened by melted water.
Avantages de la glace sèche: Mess Free Cooling
La glace sèche est un dioxyde de carbone solide. When it warms up, it bypasses the liquid phase and becomes a gas at –78.5 °C. This sublimation provides consistent ultra cold temperatures and eliminates the risk of soggy packages or freezer burn. The absence of water also prevents mould growth and bacterial proliferation that can occur with melted ice.
No residue: Sublimation means no puddles of water—perfect for protecting cardboard boxes and labels.
Lower weight: Dry ice is lighter than frozen water; this reduces shipping weight and costs.
Longer cooling period: Dry ice remains cold longer than gel packs, making it ideal for multi day transit.
Space Efficiency and Uniform Cooling
Small dry ice packs are typically thin bricks or sheets. Their shape allows them to line the sides, top or bottom of a shipping container. This design minimises “dead space,” meaning there is less air to cool and more efficient energy transfer. The result is uniform temperature distribution, reducing hot spots that could compromise product quality. For frozen seafood or vaccines, consistent temperature is critical to avoid spoilage.
Ideal Temperature Range
A small dry ice pack maintains temperatures below –40 °C, which is necessary for goods like ice cream, meat and biologics. It excels when shipments need to stay deeply frozen for more than one day. By contrast, gel packs usually keep products between 2 °C et 7 °C. For shipments that only need refrigeration, gel packs may suffice; but for frozen or ultra cold shipments, dry ice is the superior choice.
Reduced Packaging Weight
Using small dry ice packs means less mass is required to achieve the same cooling effect. Dry ice sublimates at roughly 5–10 livres par 24 heures depending on insulation quality. Because the packs are slim and can be arranged efficiently, you often need fewer pounds of dry ice compared to bulky blocks. This can cut shipping weight by 10–20%, reducing fuel costs and carbon footprint.
De quelle quantité de glace carbonique avez-vous besoin? Sizing Small Packs for Your Shipment
Correct sizing is critical to keeping goods frozen without wasting dry ice. The amount you need depends on product weight, temps de transit, insulation quality and ambient conditions.
Calculating Sublimation Rate
Dry ice sublimates at about 10 livres par jour in a standard insulated container. UPS suggests using five to ten pounds of dry ice for every 24 hour period. Since small dry ice packs are measured by weight, you can divide your required total by the weight of each pack. Par exemple, if each small pack weighs 1 pound and your shipment requires 7 pounds for a 48 hour journey, you would need seven small packs.
| Facteur | Gamme typique | How it Affects Sizing |
| Product weight | 2–20 kg | Heavier payloads hold more thermal mass; use more packs to maintain temperature. |
| Temps de transit | 24–72 heures | Longer trips require more dry ice, roughly 5–10 lbs/day. |
| Container insulation | EPS foam thickness (1–3 inches) | Higher density foam slows sublimation, so you can use fewer packs. |
| Température ambiante | –10 °C to 35 °C | Hot climates accelerate sublimation; add 20–30% extra dry ice for summer shipments. |
Quick Sizing Formula
Estimate daily dry ice requirement: Use the rule of 5–10 livres par jour.
Multiplier par les jours de transit: For a 48 hour trip, multiply the daily requirement by two.
Add safety margin: UPS recommends adding enough for an extra 24 heures to accommodate delays.
Divide by pack weight: Determine how many small packs you need. Par exemple, if your total is 15 pounds and each pack weighs 0.8 livres, you need about 19 packs.
Exemple de calcul
Suppose you are shipping 10 kg of frozen shrimp from Los Angeles to New York. The trip will take two days in summer:
Required dry ice per day: 8 lbs (midpoint of 5–10 lbs rule).
Temps de transit: 2 days → 16 lbs.
Marge de sécurité: +8 lbs (extra day).
Total: 24 lbs.
If each small dry ice pack weighs 0.5 lbs, you need 48 packs.
This may sound like a lot, but because small packs stack neatly, you can line the walls and lid without significantly increasing box dimensions.
Comparing Small Dry Ice Packs With Gel Packs and Regular Ice
Comprendre le differences between dry ice and gel packs helps determine the right coolant for each shipment.
Longevity and Temperature Control
Glace sèche remains below –40 °C and lasts longer than gel packs. The sublimation rate of about 10 lbs par 24 heures means it can maintain freezing temperatures for several days when properly packed. Packs de gel, by comparison, keep items near refrigerator temperatures (around 2–7 °C) et only stay frozen for up to six hours when used with ice in an insulated container. If your product must remain frozen, dry ice is the clear choice.
Moisture and Residue
Dry ice sublimates into carbon dioxide gas and does not produce liquid, so packages stay dry. Packs de gel melt into water and can leak, potentially damaging labels or cardboard. For pharmaceuticals or electronics where moisture could cause harm, small dry ice packs offer greater protection.
Considérations de coûts
The upfront cost of dry ice is often higher than gel packs. Gel packs can be bought in bulk and reused several times. Cependant, small dry ice packs may reduce other expenses, such as fewer re icing interventions, smaller box sizes, and lower weight based shipping charges. Businesses should factor in overall efficiency and product safety when comparing costs.
Sécurité et manipulation
Dry ice requires protective gear. Handling it without gloves can cause frostbite. Improper packaging can lead to pressure build up and potential explosion. Gel packs pose fewer safety risks, but they do not provide ultra cold temperatures.
Impact environnemental
Gel packs often contain plastics and gels that may not be recyclable, whereas dry ice sublimates to CO₂, leaving no waste. Cependant, sustainability concerns arise from the source of CO₂ used. Comme le dry ice market faces supply constraints and sustainability pressures, companies are turning to bio based carbon capture and recyclable packaging materials. Choosing small dry ice packs in recyclable insulated boxes helps balance environmental impact.
Regulatory and Safety Guidelines for Shipping Small Dry Ice Packs
Dry ice is classified as a hazardous material for air transport. Following regulations protects your shipment and ensures compliance.
Règlements d'expédition
Hazard Classification: Glace sèche (UN1845) is a miscellaneous Class 9 bien dangereux. By ground, it’s unregulated in the United States, but air shipments must follow International Air Transport Association (Iata) règles.
Packaging Instruction 954: IATA’s DGR packing instruction 954 requires packages to be designed and constructed to permit the release of CO₂ gas. Seal only three sides of the box so sublimating gas can vent. Do not use airtight containers.
Labelling Requirements: The package must show “Dry Ice” or “Carbon Dioxide, solide,” the UN number (1845) et poids net de la glace sèche. For overpacks, indicate the total dry ice weight outside the overpack.
Limites de poids: Passengers on commercial flights may carry up to 2.5 kg (5.5 lbs) of dry ice in carry on or checked baggage, but cargo shipments can hold far more. Carriers often limit each package to around 200 kg de glace sèche; always check with your carrier for specific limits.
Handling and Storage Safety
Ventilation: Store small dry ice packs in a hard sided insulated container mais never an airtight one. Sublimating CO₂ can build pressure and rupture sealed containers. Avoid storing in confined, poorly ventilated spaces such as refrigerators or cars.
Équipement de protection individuelle: Wear leather or cryogenic gloves, long sleeves and eye protection when handling dry ice to prevent frostbite and eye injuries. Brief contact is harmless, but prolonged contact can freeze skin cells.
Disposition appropriée: Allow leftover dry ice to sublimate outdoors or in a well ventilated area. Do not dispose of dry ice in sinks or toilets; it can crack pipes due to extreme cold.
Documentation: Although a shipper’s declaration is not required when the dry ice accompanies non hazardous goods, the airway bill must show UN 1845, package count and net weight. Ensure all personnel handling shipments are trained according to 49 CFR 172.704 exigences.
Packaging Best Practices for Small Dry Ice Packs
Proper packaging maximizes cooling performance and minimizes safety risks.
Choose the Right Insulated Container
Use EPS Foam or Vacuum Panels: High density expanded polystyrene (PSE) or vacuum-insulated panels slow down heat transfer. UPS notes that denser foam slows sublimation, reducing the amount of dry ice required.
Limit Dead Space: Position small packs along the walls and lid, leaving minimal empty space. Less air volume means less dry ice sublimation.
Separate Dry Ice and Product: Keep dry ice from directly touching goods. UPS recommends separating contents from dry ice to prevent freezing items that should only be chilled.
Layering and Ventilation
Pack in Layers: Alternate layers of product and small dry ice packs, starting with a pack at the bottom, product in the middle and packs along the sides and top. This ensures even cooling.
Allow Gas to Escape: Use cardboard boxes and avoid wrapping packs in sealed plastic. Mercury’s guidance says packaging must allow the release of carbon dioxide gas to prevent pressure build up.
Avoid Over sealing: Tape only enough to keep the box closed but not airtight. Excessive tape traps gas and can cause ruptures.
Étiquetage et documentation
Clearly mark “Dry Ice” and UN 1845 on the outside of the box.
Indicate the net weight of dry ice in kilograms or pounds.
Include shipper and recipient names and addresses.
For shipments subject to IATA rules, attach a Class 9 étiquette de danger.
Packing Tip Table
| Étape | Key Action | Bénéficier à vous |
| 1. Pre chill contents | Freeze or chill goods before packing to reduce dry ice usage. | Less sublimation and more stable temperatures. |
| 2. Use small packs in layers | Place packs under, around and above product. | Uniform cooling and minimal dead space. |
| 3. Add insulating material | Fill voids with paper or bubble wrap. | Slows sublimation and keeps packs from shifting. |
| 4. Évacuer le conteneur | Leave slight gaps or use vented lids. | Prevents pressure build up and explosions. |
| 5. Étiqueter correctement | Include “Dry Ice,"Et 1845 and weight. | Meets regulatory requirements and informs handlers. |
Practical Tips and Use Cases
Quick Decision Guide
Frozen seafood or ice cream: Use small dry ice packs to keep products below –20 °C. Ensure shipments longer than 24 hours contain enough packs to account for sublimation.
Vaccines and pharmaceuticals: Follow manufacturer temperature requirements. If shipments must stay below –15 °C, small dry ice packs can help maintain ultra cold temperatures but should not directly touch vials.
Local meal kits and produce: Gel packs or phase change materials may be sufficient if transit times are under 24 hours and temperatures above 2 °C are acceptable.
Long distance shipments: Combine small dry ice packs with gel packs or water ice for multi temperature zones. UPS suggests combining coolants to protect goods while mitigating the risk of freezing items that should remain chilled.
Étude de cas
Real Example: A biotech company in California needed to ship 500 vials of a gene therapy requiring storage below –60 °C to a hospital in Chicago. En utilisant 30 small dry ice packs (each weighing 0.8 lbs) and a high density foam box, they kept the payload frozen for 60 heures. UPS guidelines recommending 5–10 lbs per 24 hours guided their calculation. The shipment arrived with all vials within the required temperature range. The company avoided product loss and gained confidence in using small dry ice packs for future shipments.
Manipulation et sécurité: Protecting People and Product
Dry ice is extremely cold and can be hazardous if mishandled.
Protective Gear and Training
Gloves and eye protection: Always handle small dry ice packs with insulated gloves and goggles to prevent frostbite and eye damage.
Entraînement: Personnel involved in packing and shipping must receive hazmat training. UPS and federal regulations require training for those handling dangerous goods.
Avoid inhalation: CO₂ is heavier than air and can accumulate in low areas. Keep workspaces ventilated and avoid leaning over containers when opening them.
Storage Do’s and Don’ts
Faire store dry ice in a hard sided, insulated container with a loose lid.
Faire keep containers in a well ventilated area; CO₂ gas may displace oxygen in confined spaces.
Ne le faites pas store dry ice in airtight or glass containers—it can cause explosions.
Ne le faites pas transport dry ice in the trunk of a car without ventilation; CO₂ build up can be dangerous.
Élimination
Let unused dry ice sublimate at room temperature in a ventilated area. Do not pour dry ice down drains or sewers. Leftover small dry ice packs may be reused if they still contain solid dry ice; sinon, let them dissipate into gas.
2025 Trends Shaping Small Dry Ice Packs and Cold Chain Packaging
L'industrie de la chaîne du froid évolue rapidement. Understanding current trends helps businesses stay competitive and compliant.
Supply Challenges and Market Growth
Demand for dry ice continues to rise due to increased food shipping, biologics and vaccine distribution. Dry ice consumption is growing by roughly 5 % per year, while CO₂ supply increases only about 0.5 %. Periodic supply shortages have caused price spikes of up to 300 %. Despite these constraints, the global dry ice market is projected to grow from USD 1.54 billion in 2024 to USD 2.73 milliards 2032.
Sustainable CO₂ Sources
Sustainability pressures are encouraging the use of bio based CO₂ capture. Bioethanol plants capture CO₂ released during fermentation and convert it into food grade dry ice. This circular process reduces reliance on fossil based CO₂ and lowers the carbon footprint of small dry ice packs. Cependant, reliance on a few large producers makes markets vulnerable to geopolitical pressures and supply disruptions.
Alternatives and Hybrid Solutions
Businesses are diversifying their cooling strategies. Gel packs and phase change materials maintain a narrower temperature band and suit refrigerated goods (2–8 ° C). Mechanical refrigeration—active containers powered by batteries—provides precise control for pharmaceuticals but is expensive. Hybrid solutions combine small dry ice packs with advanced insulation to reduce the quantity of dry ice needed.
Eco Friendly Materials and Ready to Use Kits
Coldkeepers reports that eco friendly materials like recyclable paper based insulation and re pulpable insulation are replacing expanded polystyrene foam. Gel packs are being filled with non toxic and non caustic formulas, making them safer to dispose of. Preassembled, ready to use thermal shipping kits simplify packing and reduce human error.
Smart Monitoring and Data Analytics
Real time temperature monitoring is becoming mainstream. IoT enabled sensors and Bluetooth loggers provide immediate alerts when temperatures exceed safe ranges. Data collected helps meet regulatory documentation requirements and improves customer confidence. Companies using data analytics optimize shipping routes and packaging choices to reduce excursions and costs.
Branded and Direct to Consumer Packaging
More businesses are investing in branded thermal packaging. Custom printed insulated bags and boxes enhance brand recognition and create a positive unboxing experience. En même temps, direct to consumer (DTC) delivery requires small, lightweight thermal packaging that fits residential delivery constraints. Small dry ice packs, with their compact form and lower weight, support DTC shipments while maintaining product quality.
Data Driven Planning and Optimization
Predictive modeling and analytics tools help cold chain managers determine the best shipping routes and packaging materials based on weather patterns, transit times and carrier performance. This data driven approach reduces costs and ensures consistent product safety. Providers like Coldkeepers advise clients on customizing packaging according to shipment profiles.
Questions fréquemment posées
Q1: Why are small dry ice packs better than loose dry ice pellets?
Small dry ice packs have a uniform shape that fits snugly in containers, minimizing dead space and ensuring even cooling. Pellets shift during transit, creating hot spots and uneven temperatures. Packs also reduce the risk of CO₂ build up because they can be arranged to allow gas to vent safely.
Q2: How long will a small dry ice pack last?
The longevity depends on insulation and ambient temperature. En général, La glace sèche sublime à 5–10 lbs per day. If a small pack weighs 0.5 lbs, expect it to last 12–24 hours. Use more packs or thicker insulation for longer journeys.
Q3: Can I combine small dry ice packs with gel packs?
Oui. Combining coolants can maintain different temperature zones within the same package. UPS suggests mixing dry ice with frozen gel packs for shipments exceeding one or two days. Place gel packs near items that should stay chilled but not frozen and small dry ice packs near items requiring deep freezing.
Q4: Are there restrictions on how much dry ice I can ship?
Passenger baggage is limited to 2.5 kg (5.5 lbs) de glace sèche. Cargo shipments can include larger quantities; cependant, carriers may cap each package around 200 kg and require specific packing instruction 954 conformité. Always check with your carrier.
Q5: How do I safely handle small dry ice packs?
Wear insulated gloves and eye protection when handling dry ice. Do not store packs in airtight containers or confined spaces; vent the container to allow CO₂ gas to escape.
Q6: What makes dry ice eco friendly if it releases CO₂?
La glace sèche sublimait le dioxyde de carbone. While CO₂ emissions are a concern, much of the CO₂ used is captured as a byproduct of industrial processes or bioethanol fermentation. Using recycled CO₂ helps reduce overall emissions. En plus, dry ice leaves no solid waste compared with gel packs that may end up in landfills.
Résumé et recommandations
Small dry ice packs provide powerful, mess free cooling. Dry ice sublimates directly into gas and maintains extremely low temperatures, making it ideal for keeping goods frozen over long distances. Compared with gel packs, small dry ice packs last longer, leave no residue and deliver more uniform cooling. Cependant, dry ice requires proper handling; use insulated gloves and vented containers. Regulations require packages to be labelled with UN 1845 and net weight and to allow CO₂ gas to escape. Pour des résultats optimaux, calculate dry ice needs based on weight and transit time, add a safety margin and pack in layers. Stay informed about market trends—supply constraints, durabilité, smart monitoring and ready to use kits will shape cold chain strategies through 2025. Use this knowledge to choose the right mix of small dry ice packs, gel packs and eco friendly packaging to maintain product integrity and meet evolving customer expectations.
Appel à l'action
To ensure your shipments stay frozen and compliant, work with experts who understand cold chain logistics. Evaluate your product’s temperature requirements and transit time, then design a packaging system with the appropriate number of small dry ice packs. Consider adding smart sensors for real time monitoring and exploring sustainable packaging options. Reach out today to discuss customized small dry ice pack solutions tailored to your business.
À propos du tempk
Tempk est spécialisé dans les solutions avancées d'emballage de la chaîne froide. We design and manufacture small dry ice packs, gel packs and insulated containers tailored for food, pharmaceutical and biotech shipments. Our reusable packs deliver stable ultra cold temperatures while reducing shipping weight and environmental impact. With a dedicated R&D team and a commitment to sustainability, we provide eco friendly materials and ready to use kits that streamline packing and improve efficiency. We invite you to explore our products and consult with our team to find the ideal cold chain solution for your needs.
