Safe handling of dry ice

Before handling and using dry ice, ensure you understand its properties, potential hazards and actions to take in an emergency. Contact BOC for the latest ‘Carbon Dioxide (Solid) Safety Data Sheet.’

Properties

• Dry ice is solid carbon dioxide
• Chemical formula CO₂
• Dry ice appears as a translucent white solid which at normal temperatures sublimes from the solid state directly into a gas without passing through a liquid phase
• Non-flammable, asphyxiant
• Colourless gas with a slightly pungent odour that is only detectable at high concentrations

Hazards

• In high concentrations, sublimed vapour may cause asphyxiation. 10kg of dry ice sublimes into about 5.4m³ of carbon dioxide gas

• The temperature of dry ice is -78°C. Contact with dry ice can cause cold burns or frostbite

Safe use of dry ice

• Always wear eye protection and heavy insulated gloves suitable for the extreme cold temperature of dry ice. Never handle dry ice with your bare hands – it can cause frostbite
• Before using dry ice in any area, establish the risks involved. Ensure you consider the potential for the creation of atmospheres with a high concentration of carbon dioxide near the ground
• Only experienced and properly instructed people should handle dry ice
• Do not remove or deface any product labels
• Know and understand the properties of dry ice
• Establish plans for an emergency
• Always seek professional advice on suitable ventilation systems. Use carbon dioxide monitors to warn of problems
• Never play games with dry ice
• Always keep dry ice away from children
• Water on solid CO₂ increases sublimation with a corresponding higher risk of asphyxiation
• Dispose of dry ice in a well-ventilated area away from the public. Do not discharge it into any place where its accumulation could be dangerous
• Take care when carrying packages of dry ice