Hazards Associated with Cryogens

There are five main safety hazards associated with the use of cryogens. 

• Pressure buildup
• Back injuries
• Freezing (thermal) hazards
• Ice buildup
• Asphyxiation

Somewhat less common but non-trivial hazards include water puddling (causing slip/trip) and hearing damage (when filling large Dewars from bulk tank).