Hazards of Gaseous and Liquid Nitrogen

Gaseous nitrogen is an odorless, colorless gas used in the X-15 aircraft for cooling and pressurizing. Nitrogen is chemically inactive. The gas isn't corrosive, explosive, nor combustible.

The only possible hazards arising from the use of gaseous nitrogen stems from (1) high storage and transfer pressures normally employed, or (2) shortage of breathing oxygen because of extremely high concentrations of the gas.

The only physiological hazard to be considered in handling liquid nitrogen is the effect of the extreme cold, which destroys living tissue and produces an injury similar to a burn. In addition, freezing can restrict blood circulation and cause gangrene, especially in the extremities. Sufficient liquid nitrogen splashed into the eyes will cause blindness.