CGA G-5.3
Commodity Specification for Hydrogen
     United States



Compressed Gas Association


CGA G-5.3
Commodity Specification for Hydrogen



Describes specification requirements for commercially available gaseous and liquid hydrogen. Presents data on quality verification, sampling, analytical procedures, typical uses for various grades (QVLs) including recommendations for use of liquid grades A, B and C and gaseous hydrogen grades F and L for use for Fuel Cell applications.   Includes guidance for sampling at the dispenser and guidance for station operators on how to manage impurities with respect to the limits of SAE J2719. Includes supplemental tables.


This document is harmonized with the SAE fuel specification, SAE J2719




7th edition published 2017. Available from


Deadline to submit proposed changes for next edition: 6/4/22.


Background Information

See:  Power Point Presentation on Hydrogen Quality