Dry Ice Safety

Precautions for handling dry ice are found in CGA G-6.9, Dry Ice. General precautions for the safe handling of gaseous carbon dioxide are contained in CGA G-6, Carbon Dioxide.

Dry ice has a temperature of –109.3 °F (–78.5 °C) at 1 atmosphere and must be protected during storage with thermal insulation in order to minimize loss through sublimation. When entering low or confined areas where a high concentration of carbon dioxide gas may be present, use a self-contained breathing apparatus (SCBA) or supplied-air respirator. Do not use a cartridge-type respirator.

Dry ice should be stored in a cool, well-ventilated area in well-insulated storage containers designed to prevent pressure buildup. If transporting in the passenger compartment or trunk of a vehicle, limit dry ice to small quantities and open all windows or ensure constant supply of fresh air for the duration of the trip.

Care should be taken when handling dry ice. Use protective gloves such as work gloves or ice tongs; do not handle dry ice with bare hands. Blocks of dry ice can weigh in excess of 50 lb (22.7 kg) and can cause injury if dropped.

Dry ice is extremely cold and can freeze human tissue on contact. Never place dry ice in your mouth. If swallowed, the dry ice will rapidly expand and can cause serious injury or death.

The best method for disposal is to allow the dry ice to sublime or evaporate to the atmosphere in a well-ventilated area where no buildup of carbon dioxide vapor can occur. Such areas should be secured to ensure controlled access to authorized personnel only. Unused dry ice may be returned to the supplier for proper disposal.

Do not dispose of dry ice:

• in sewers, sinks or toilets;
• in bodies of water;
• in garbage receptacles;
• on the ground when located over underground utilities;
• in unprotected boxes; or
• in areas accessible to the general public.