Compound, % of each compound*

• Hydrogen, 12.500 %
• Argon, 1.000 %
• Nitrogen, 37.200 %
• Carbon monoxide, 1.000 %
• Carbon dioxide, 3.000 %
• Methane, 5.000 %
• Ethane, 4.000 %
• Ethylene, 2.000 %
• Acetylene, 1.000 %
• Propane, 6.000 %
• Propylene, 3.000 %
• Propadiene, 1.000 %
• Isobutane, 5.000 %
• N-Butane, 4.000 %
• Isobutylene, 1.000 %
• 1,3 Butadiene, 3.000 %
• cis-2-Butene, 2.000 %
• trans-2-Butene, 3.000 %
• 1-Butene, 2.000 %
• 2-Methyl-2-butene, 0.200 %
• Isopentane, 1.000 %
• N-Pentane, 1.000 %
• cis-2-Pentene, 0.400 %
• trans-2-Pentene, 0.200 %
• Pentene-1, 0.400 %
• Hexanes plus, 0.100 %

*Precise concentrations are provided on the data sheet included with each cylinder and may vary slightly from those listed here.