#  Lab Safety Guideline: Cryogenic Liquid Nitrogen and Argon 

 



 

##  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.

 

 [ Lab Safety Guideline: Cryogenic Liquid Nitrogen and Argon (HarvardKey Required) arrow\_circle\_right ](https://hu.sharepoint.com/:b:/s/EHSResources/EZwOYrKBN09MnS-I8wFMiO0B1IQ4xDJDC-RYMB6S08tQig?e=OZTTq6) 

 



 

 

 

 

 

 See also:- [ Labs and Research ](/audience/labs-and-research)
- [ Chemicals and Hazardous Materials ](/topic-areas/chemicals-and-hazardous-materials)
- [ Lab Chemical Safety Guidelines ](/topic-areas/lab-chemical-safety-guidelines)
- [ Shipping and Transportation ](/topic-areas/shipping-and-transportation)