Dry Ice is basically solid carbon dioxide.

The surface temperature of a block of dry ice is about -78 degree celsius.

This makes it much cooler than odinary ice which is made up of water.

Thus giving severe frostbite.

But why is it so harmful for us?

Consuming dry ice can inflict severe damage to the skin and internal organs due to the extremely low temperatures it can maintain. 

If dry ice comes in contact with our skin, our cells begin to freeze and die within seconds.

According to FSSAI, FDA & CDC, both dry ice and liquid nitrogen are lethal substances.