liquid nitrogen

Liquid nitrogen A demonstration of liquid nitrogen at the Freeside maker space in Atlanta, Georgia, during the Online News Association conference in 2013 Students preparing homemade ice cream with a dewar of liquid nitrogen

Liquid nitrogen (LN2) is nitrogen in a liquid state at low temperature. It has a boiling point of about −196 °C (−321 °F; 77 K). Liquid nitrogen is produced industrially by fractional distillation of liquid air. It is a colorless, mobile liquid whose viscosity is about half that of acetone (i.e. roughly one-sixth that of water at room temperature). Liquid nitrogen is widely used as a coolant.