The gas emitted by dry ice is not toxic. Although dry ice is not toxic and it is harmless to inhale a small amount of dry ice gas, it must not be used as ordinary ice, because its temperature is -78.5℃. If dry ice is eaten by mistake, it will lead to frostbite of respiratory tract and even body viscera. Dry ice is made by liquefying carbon dioxide into colorless liquid and then rapidly solidifying under low pressure. It is solid carbon dioxide.

The temperature of dry ice is much lower than that of water, so it is equivalent to heating dry ice, which absorbs heat and sublimates, reducing the temperature of water and even freezing it.

Dry ice is widely used in stage, theater, film and television, weddings, celebrations, parties and so on to produce the effect of a sea of clouds, and there are countless classic repertoires with special effects made of dry ice in China and even in the world. Dry ice is used to put out fires, such as some low-temperature fire extinguishers.

If you need to touch dry ice, remember to be careful, and use thick cotton gloves or other shelter every time you touch dry ice. If it is in direct contact with the skin for a long time, it may cause cell freezing and similar slight or extremely serious frostbite damage.