The gas emitted by dry ice is non-toxic, carbon dioxide, colorless, odorless and non-toxic. The gas emitted by dry ice is harmless to the human body in a small amount, but it will cause dizziness and other discomfort in a large amount.

Dry ice is effective as a coolant and suitable for long-distance transportation. Drylce is solid carbon dioxide, which is liquefied into colorless liquid under the pressure of 6250.5498 kPa, and then rapidly solidified under low pressure. Now dry ice has been widely used in many fields.