Liquid nitrogen

"LN2" redirects here. For the high-speed railway line in France, see LGV Atlantique. For the number expressed by ln 2, see Natural logarithm of 2.

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 one-tenth that of acetone (i.e. roughly one-thirtieth that of water at room temperature). Liquid nitrogen is widely used as a coolant.

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