Hydrogen Safety - Agilent Technologies 990 Micro GC Safety Manual

Hydrogen Safety

Hydrogen Safety
Hydrogen is a commonly used GC carrier gas. When mixed with air, hydrogen
can form explosive mixtures and has other dangerous characteristics.
When using hydrogen (H
WAR N IN G
create a fire or explosion hazard. Be sure that the supply is turned off until all
connections are made.
Hydrogen is flammable. Leaks, when confined in an enclosed space, may
create a fire or explosion hazard. In any application using hydrogen, leak test all
connections, lines, and valves before operating the instrument. Always turn off
the hydrogen supply at its source before working on the instrument.
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Agilent 990 Micro GC and 990 Mobile Micro GC Chromatograph Safety Manual
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Hydrogen is combustible over a wide range of concentrations. At
atmospheric pressure, hydrogen is combustible at concentrations from 4%
to 74.2% by volume.
Hydrogen has the highest burning velocity of any gas.
Hydrogen has a very low ignition energy.
Hydrogen that is allowed to expand rapidly from high pressure into the
atmosphere can self-ignite.
Hydrogen burns with a nonluminous flame which can be invisible under
bright light.
If hazardous gases are used, ensure there is proper exhaust ventilation.
) as the carrier gas, be aware that hydrogen gas can
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