Compound, % of each compound*

• Hydrogen, 40.750 %
• Argon, 0.500 %
• Nitrogen, 4.000 %
• Carbon monoxide, 1.000 %
• Carbon dioxide, 3.000 %
• Methane, 8.500 %
• Ethane, 6.000 %
• Ethylene, 2.000 %
• Propane, 7.000 %
• Propylene, 3.000 %
• Propadiene, 0.850 %
• Isobutane, 6.000 %
• N-Butane, 4.000 %
• Isobutylene, 2.000 %
• 1,3 Butadiene, 3.000 %
• cis-2-Butene, 2.000 %
• trans-2-Butene, 2.000 %
• 1-Butene, 2.000 %
• Isopentane, 1.000 %
• N-Pentane, 1.000 %
• N-Hexane, 0.500 %

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