Cryogens used on Campus

Cryogens are materials with boiling points of less than -73oC (-100oF). Examples of cryogens used on campus are:

  • Liquid Helium, b.p. -269oC
  • Liquid Nitrogen, b.p. -196oC
  • Solid Carbon Dioxide (Dry ice), sublimation point -78oC


Cryogens present a burn hazard from their extreme cold, an asphyxiation hazard from potential oxygen displacement and an explosion hazard from pressure buildup in containers.

In the event of an emergency

In case of spill in a restricted space:

  • Evacuate and do not enter the area until oxygen levels can be confirmed to be safe.
  • Notify personnel in surrounding areas who may be affected.

In case of cryogenic liquid contact with skin/eye:

  • Immediately flush affected area with copious amounts of tepid water (max 44 oC)
  • DO NOT apply any form of dry or direct heat.
  • DO NOT rub affected parts either before or after warming.
  • Move individual to a warm place and contact Campus Security (778-782-4500) for medical attention.

Cryogen-related guidelines