Which statement about packing and shipping dry ice is true?

Which statement about packing and shipping dry ice is true?

• A. Requires vented packaging
• B. Helps keep materials heated during transport
• C. Should be included only between the rigid outer packaging and secondary packaging
• D. Must be stored at ambient temperature only

Answer: (A)

When packing and shipping dry ice, the key idea is that dry ice constantly sublimates into carbon dioxide gas. If this gas is trapped in a sealed container, pressure builds up and can cause the packaging to fail or create a hazardous situation. That’s why vented packaging is required: it provides a safe path for the gas to escape as the dry ice sublimates, keeping the package intact and the transport safe. The other statements don’t fit because dry ice is used to keep things cold, not heated; it must be kept at very low temperatures, not ambient; and while the exact placement can vary by packaging design, the essential requirement across regulations is to have venting so CO2 can escape, not a fixed rule about being installed only between certain packaging layers.

When packing and shipping dry ice, the key idea is that dry ice constantly sublimates into carbon dioxide gas. If this gas is trapped in a sealed container, pressure builds up and can cause the packaging to fail or create a hazardous situation. That’s why vented packaging is required: it provides a safe path for the gas to escape as the dry ice sublimates, keeping the package intact and the transport safe.

The other statements don’t fit because dry ice is used to keep things cold, not heated; it must be kept at very low temperatures, not ambient; and while the exact placement can vary by packaging design, the essential requirement across regulations is to have venting so CO2 can escape, not a fixed rule about being installed only between certain packaging layers.