Lab Safety Guideline: Cryogenic Liquid Nitrogen and Argon

Summary

You must review this guideline before working with cryogenic liquid nitrogen (LN2) or liquid argon (LAr) in lab settings.

This guideline also includes:

• Filling open dewars from LN2 cylinders.
• Using liquid withdrawal devices.
• Cryogenic freezers and refrigeration units.
• Pouring LN2 into small containers from transfer dewars.
• Designing and building custom equipment.
• Withdrawing gas-phase nitrogen from LN2 cylinders.
• Preparing dry shippers.

Who is this for?

Lab and research staff.