Hydrogen (H2)

Hydrogen is the lightest of all gases and Hydrogen comprises 98% of the known universe. Colorless, odorless, tasteless and nontoxic, hydrogen exists as a gas at atmospheric temperatures and pressures. When cooled to its boiling point of -423°F (-253°C), hydrogen becomes a liquid and all other gases, except helium become solids at this temperature.

Hydrogen is flammable and burns in air with a pale blue, almost invisible flame. In its gaseous form, hydrogen dissipates quickly. These unique properties call for strict safety measures in hydrogen use and storage.

Common uses of Hydrogen?

Hydrogen has many uses from arc welding shielding gases to fuel cells to rocket propellant. Other uses include petroleum refining processes, chemical processing of plastics, hydrogenation of food grade oils, protective atmospheres for metal production and plasma welding and cutting operations.

Common Cylinder Sizes

Bulk - call for details
K - 195cf, Q - 80cf all 2,200psi at 70°F
Cylinder Pressure changes with temperature, click to find out details (pdf)
Larger Cylinder Sizes and Higher Pressures are available. Please call.

Common Conversion Factors

1 gallon liquid (nbp) = 113.6 cf Gas (NTP)
1 liter liquid (nbp) = 30 cf Gas (NTP)
1 kg = 423 cf Gas (NTP)
1 pound = 192 cf Gas (NTP)

Properties of Hydrogen:

Molecular Weight: 2.02
Specific Volume: 192 CF/lb
Flammable Limits: 4.0-75% in Air
CGA Valve: 350, 3HP-703, 2HP-695
DOT Name: Hydrogen, Compressed UN No.: UN1049
DOT Class: 2.1
DOT Label: Flammable Gas
CAS Registry: 1333-74-0

Hydrogen Purity Levels

Cylinder Size Details (pdf)

MSDS

Safe Handling of Compressed Gases (pdf)