# Molecular Formula: O2
# Molecular Weight: 31.999
# Boiling Point @ 1 atm: -297.4°F (-183.0°C, 90oK)
# Freezing Point @ 1 atm: -361.9°F (-218.8°C, 54oK)
# Critical Temperature: -181.8°F (-118.4°C)
# Critical Pressure: 729.1 psia (49.6 atm)
# Density, Liquid @ BP, 1 atm: 71.23 lb/scf
# Density, Gas @ 68°F (20°C), 1 atm: 0.0831 lb/scf
# Specific Gravity, Gas (air=1) @ 68°F (20°C), 1 atm: 1.11
# Specific Gravity, Liquid (water=1) @ 68°F (20°C), 1 atm: 1.14
# Specific Volume @ 68°F (20°C), 1 atm: 12.08 scf/lb
# Latent Heat of Vaporization: 2934 BTU/lb mole
# Expansion Ratio, Liquid to Gas, BP to 68°F (20°C): 1 to 860
# Solubility in Water @ 77°F (25°C), 1 atm: 3.16% by volume
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