Carbon dioxide cooled to the point at which it becomes solid, which occurs at -110°F (-78.9°C). It is used as a commercial refrigerant and for therapeutic refrigeration in the treatment of certain skin conditions, including warts.
Dry ice is the solid form of carbon dioxide. This transition from a gaseous to a solid state happens when it’s cooled, bypassing the liquid stage entirely. In the medical field, dry ice has uses such as cryosurgery, a technique which involves freezing and it’s often utilized to remove skin conditions like warts.