Dry ice sublimates and releases CO₂. Gas can accumulate where ventilation is inadequate; opening containers and entering vehicles require a site risk assessment. CDC documents a dry-ice transport incident causing loss of consciousness in a pickup cab with closed windows and recirculated air.
Plan the task and area in advance
Read the product SDS and workplace instructions; assign trained personnel. Specify ventilation, access, PPE and how to summon emergency help.
Control approach during opening and unloading
Do not open in an enclosed space or lean into the container. Before entering a vehicle body, room or pit, verify the atmosphere under site procedure.
Evacuate if exposure is suspected
If someone feels unwell or an alarm activates, stop approach, clear the area and follow the emergency plan. Do not attempt an untrained rescue.
Use monitoring and procedure, not a timer
Do not set a universal waiting interval or dry-ice quantity. Let the facility risk plan, SDS and authorised safety owner govern CO₂ monitoring and re-entry.
