Transporting dry ice
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Plan on using 5 to 10 pounds of dry ice for every 24-hour period traveling. Place items to carry in an insulated shipping container or an ice chest. For larger containers and longer traveling times, increase these rates. The best traveling container is a three-inch thick urethane insulated box tested to loose only 5 pounds for a 10-quart storage area every 24-hours. When packing items in the container fill the empty space with wadded newspaper or a paper bag. Any "dead-air-space" will cause the Dry Ice to sublimate faster. Dry Ice sublimation (changing from a solid to a gas) will vary depending on the temperature, air pressure and thickness of insulation. The more Dry Ice you have stored in the container, the longer it will last. Dry Ice, at -109.3°F or -78.5°C, will freeze and keep frozen everything in its container until it is completely sublimated. These frozen items will still take extra time to thaw because they are so cold.

Plan to pick up the Dry Ice as close to the time it is needed as possible. Carry it in a well-insulated container such as an ice chest. If possible pack insulating items such as sleeping bags around the ice chest. This will stretch the time of the Dry Ice lasts. If it is transported inside a car or van (not in the trunk) for more than 10 minutes make sure there is fresh air entering the car. After 15 minutes with Dry Ice only in its paper bag in the passenger seat next to me, I started to breathe faster and faster as though I were running a race. I couldn't figure out why I was so out of breath until I saw the car air system was set in the re-circulated position, not fresh outside air.

Pick up Dry Ice as close to departure time as convenient. Carry it in a well-insulated container such as an ice chest or insulated soft pack. If it is transported inside a car or van for more than 10 minutes make sure there is fresh air available. Most airlines will not let you carry more than two kilograms (4.4 pounds) of Dry Ice on the airplane. Because Dry Ice will sublimate continuously from the time of purchase, you can confidently declare that there is no more than two kilograms at the time you check in at the airport. If the container is checked in as baggage and not carried on board, it will sublimate faster due to the lower pressure of the baggage compartment. Make plans to refrigerate or add Dry Ice when arriving at your destination.

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