Dry ice is basically a solid carbon dioxide. The surface temperature of dry ice block is -78°c. This means it is much cooler than the normal ice which is made up of water. If the dry ice comes in contact with our skin, our cells begins to freeze and cause frostbite. In addition to this, storing dry ice in airtight containers is dangerous. This is because dry ice can sublimates(it directly converts from solid to vapor). Hence, in airtight containers, the gas produced can build up and exert pressure on the walls of containers which can lead to a dangerous explosion.
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