Liquid nitrogen is a clear, colorless liquid that is the primary component of cryogenic refrigerants. It is produced through the fractional distillation of liquid air and boils at -195.8°C (-320.4°F). Liquid nitrogen is used for a variety of industrial and scientific purposes due to its low boiling point, including freezing and preserving biological samples, metal embrittlement testing, inert gas welding, and inflating balloons for party tricks.