What is Dry Ice?

Dry ice was mistakenly offered to a party of diners at a Gurugram restaurant and subsequently caused them to vomit blood.

Dry ice is carbon dioxide in its solid form. It is a dense, snowlike substance that sublimes (passes directly into the vapour without melting) at −78.5 °C.

When it is not being used to fog up rock concerts, it’s often used to keep perishables cool during shipping or when mechanical cooling is not available.

Dry ice should never be kept or stored or transported in a closed environment which may lead to breathlessness due to carbon dioxide gas emission.

Naturally occurring dry ice is found in abundance on a number of celestial bodies in our solar system, including Mars and several of the moons of Uranus and Neptune.