Liquid nitrogen

This policy is intended to remind users of the dangers associated with the use of liquid nitrogen, including the risks of asphyxiation, cold burns, and explosions caused by trapped, expanding gas.  The term dewar is used throughout to mean a vacuum insulated vessel operating at less than 0.5 bar gauge.  The policy includes information on:

  • risk assessment
  • properties and hazards of liquid nitrogen
  • ventilation and oxygen monitoring requirements
  • general precautions for small-scale use
  • bulk liquid nitrogen storage
  • information, instruction and training