Compressed hydrogen

Compressed hydrogen (CH2, CGH2 or CGH2) is the gaseous state of the element hydrogen kept under pressure. Compressed hydrogen in hydrogen tanks at 350 bar (5,000 psi) and 700 bar (10,000 psi) is used for mobile hydrogen storage in hydrogen vehicles.[1] It is used as a fuel gas.

Compressed Hydrogen
IUPACCompressed hydrogen
Other namesHydrogen under pressure, CGH2, CGH2
UN number1049, Class 2
IMO1049, Class 2.1
DOT1049, Class 2.1
ADR1049, Class 2.1
IATA1049, Class 2.1
PEL-OSHASimple asphyxiant
ACGIH TLV-TWASimple asphyxiant
AppearanceColorless, odorless
LEL4 %
UEL75 %
Auto ignition500 °C (932 °F)


Compressed hydrogen is used in hydrogen pipeline transport and in compressed hydrogen tube trailer transport.

See also


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