Dry ice should never be disposed of in a sink, toilet, or other drainage systems as it can cause pipes to freeze and potentially burst. The safest disposal method is to allow dry ice to sublimate in a well-ventilated area where the CO2 gas can disperse harmlessly into the atmosphere. It is important to ensure that the area is not confined to prevent the accumulation of CO2, which could lead to asphyxiation.
Additionally, dry ice should not be left unattended in areas accessible to the public or unauthorized personnel.
