Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Cryogen Safety Program
This suborder covers the minimum requirements to handle and use common cryogenic fluids safely. Cryogenic fluids are defined as liquids with normal boiling points below -150°C (-238°F, 222°R, 123 K). This suborder is limited to the use of liquid helium, nitrogen, neon, and argon and the liquid-to-vapor transition. This applies to either the cryogenic liquid or its gas at or near its boiling point.
Created April 2, 2014, Updated July 24, 2023