Dry Ice Warning

Cold Star Ice

Dry Ice Information Sheet

Dry ice is frozen carbon dioxide (CO2), the gas that we exhale during breathing. Dry ice is extremely cold (-109 degrees F). Dry ice does not evaporate like a liquid. Instead, it goes directly from a solid to a gas, a process called sublimation, under normal atmospheric conditions. Because there is no messy liquid state, dry ice is particularly useful as a coolant and is harmless to life in normal (small) concentrations.

Carbon dioxide is relatively easily converted to a frozen state. The first step in making dry ice is to compress the carbon dioxide gas until it liquefies. During compression, the gas heats up, just as air in a bicycle pump heats when it is compressed. If the excess heat is removed, keeping the CO2 at room temperature, the gas begins to liquefy at a pressure of approximately 870 pounds per square inch. next, the pressure is reduced over the liquid carbon dioxide by sending it through an expansion valve. Part of the liquid evaporates, causing the remainder to freeze into “snow” flakes. When normal atmospheric pressure is reached, the temperature drops to -109.3 degrees F, the temperature of dry ice. The dry ice snow is then compacted under a large press to form blocks.

Dry ice has many applications:
It keeps things frozen without refrigeration. It can quick chill, firm or freeze meats, vegetables and other perishables for preservation during shipping and transportation. Dry ice snow may be applied directly to the surface of foods in a freezing chamber or tunnel, or may be deposited on the contents of a container.
It can be added directly to the choppings and mixes used in the preparation of hamburger, sausage, and prepared meat products such as bologna. The quick chilling reduces meat temperature rapidly, retarding the growth of bacteria.
Hospitals and laboratories use it to ship frozen tissue, soil, fruit, and vegetable samples for study or processing. Tissue, bacteria, and pesticides can be an analyzed in the preserved samples.
Companies that handle hazardous materials use it to purge explosive gases from buried tanks before removing them from the ground. C02 is heavier than air and it will drive oxygen and hydrocarbon fumes out of the tanks and neutralize some fumes for a short period of time.
Other uses include carbonating liquids (making soda pop), shrinking metal bearings or axles, removing small dings from car panels, removing tile and other floorings, chilling spices, sugar, chemicals, and rubber during high-speed grinding, fumigating food, eradicating gophers. It can be used as a chemical retardant, a neutralizing agent, or in school projects such as a cloud chamber or to make Halloween “fog”. Dry ice is the only form of ice that will keep ice cream solid.


1. Coolers for camping, hunting and fishing.
Place dry ice in the bottom of your cooler. Cover it completely with regular ice. Then pack your cooler as normal with food and beverage items. The Cooler will keep items cold for 3 or 4 days.

2. Pack your trophy game
Pack the animal or fish in dry ice to insure non spoilage (remember do not allow direct contact of trophy with dry ice, this may cause superficial damage.)

3.Fun with dry ice
Amaze your friends with witch’s brew by placing a block in a plastic or metal saucer inside a well ventilated punch bowl, then add the punch.

4.Create fog with dry ice
Fill a large metal bowl 1/2 full with hot water, add 1 to 2 lbs. of dry ice every 10 to 15 minutes, make sure the water remains hot.

5.Root Beer recipe
to make 1 gallon mix in a metal bowl 1lb. sugar 1 gallon purified water and 1 ounce Schilling Root Beer extract

6.Cooling and freezing
Keep your beer keg cold by placing pieces of dry ice mixed with the wet ice around keg.

7.Shrink fitting of metals
To aid in the bearing installation, heat shrink automotive body parts,. Use to repair automotive hail damage by placing block directly into center of dent for a moment and the dent may pop out.

8.Ship frozen items with dry ice to ensure frozen food will remain frozen

-Does not melt into water. It goes from a solid to a gas.
-Dry ice can extend the life of wet ice.
-When dry ice is used for cooling, place in bottom of container. Do not allow food or cans to have direct contact.
-When dry ice is used for freezing, place on top of items you want frozen.
-Keep dry ice wrapped in paper for safety and the installation will extend the life of the dry ice
CAUTION- Dry ice temperature is -110F

Do not handle with bare hands: wear gloves to avoid contact with skin.
Do no put in airtight containers or stopped bottles.
Do not inhale vapors
Do not eat
Do not put in drinks
Keep out of reach of minors

Effective cooling time:
5lbs- 18hrs
7lbs – 24hrs
10lbs – 36hrs
15lbs – 48hrs
20lbs- 72hrs
Ice wrapped and in an insulated container.