THERMOPHYSICAL PROPERTIES HAZARDOUS PROPERTIES
Flammability
Product Formula State Molecular Weight Vapor Pressureat 70° F (psig) Specific Gravity at 70° F (1 atm) Critical Temp(°F) Critical Pressure (psia) Specific Volume(cf/lb) Heat Capacity (Btu/lb.-Mole °F) Flammable limits in Air(Vol. %) Ignition Temp., (°F) Physiological Properties Threshold Limit Value (ppm)
Acetylene C2H2 Dissolved Gas 26.04 635 0.905 97.3 905.3 14.7 10.6 2.5-81 581
 
SA
Air
 
Compressed Gas 28.97 * * -221.1 546.8 13.3
 
 
 
Oxidant
 
Ammonia NH3 Liquefied Gas 17.03 114 0.60 270.4 1639 22.6 8.6 15-28 1204 Corrosive and Toxic 25
Argon Ar Compressed Gas 39.95 * 1.38 -188.1 710 9.7 4.97
 
 
Inert SA
Arsine AsH3 Liquefied Gas 77.95 205 2.69 211.8 957 5.0
 
4-64
 
Poison 0.05
n-Butane C4H10 Liquefied Gas 58.12 16 2.08 305.6 550.8 6.4
 
1.8-8.4 788 Narcotic 800
Carbon Dioxide CO2 Liquefied Gas 44.01 838 1.52 87.8 1071 8.74 8.97
 
 
Inert 5,000
Carbon Monoxide CO Compressed Gas 28.01 * 0.97 -220.4 507.4 13.8 6.96 12.5-74 1204 Toxic 50
Chlorine Cl2 Liquefied Gas 70.91 85.3 2.47 291.2 1118.7 5.4 8.2
 
 
Oxidant and Toxic 1
Deuterium D2 Compressed Gas 4.03 * 0.139 -390.7 241 96.0 6.97 4.9-75 1058
 
SA
Diborane B2H6 Compressed Gas 27.67 * 0.95 62.1 581
 
 
0.8-98 100 Highly Toxic 0.05
Ethane C2H6 Liquefied Gas 30.07 543 1.047 90.1 708 12.8 12.6 3-12.4 986
 
SA
Ethyl Chloride C2H5Cl Liquefied Gas 64.52
 
 
368.96 764.4
 
 
3.8-15.4
 
 
1000
Ethylene C2H4 Compressed Gas 28.05 * 0.974 49.8 742 13.8 10.4 3.1-32 1009
 
SA
Helium He Compressed Gas 4.003 * 0.138 -450.3 33.2 96.7 4.98
 
 
Inert SA
Hydrogen H2 Compressed Gas 2.02 * 0.0696 -399.96 190.8 192 6.89 4-75 1085
 
SA
Hydrogen Chloride HCl Liquefied Gas 36.46 613 1.27 124.6 1200 10.6 6.9
 
 
Corrosive 5
Hydrogen Sulfide H2S Liquefied Gas 34.08 252 1.189 212.7 1308 11.2 8.2 4.3-45 500 Irritant and Toxic 10
Isobutane C4H10 Liquefied Gas 58.12 30.8 2.0 275 592.2 6.5
 
1.8-8.4 864 Anaesthetic SA
Krypton Kr Compressed Gas 83.8 * 2.898 -82.8 798 4.6 5.0
 
 
Inert SA
Methane CH4 Compressed Gas 16.04 * 0.555 -115.8 673 23.7
 
5-15 1000
 
SA
Methyl Chloride CH3Cl Liquefied Gas 50.49 58.7 1.74 289.6 968 7.6 9.97 10.7-17.4 1170 Toxic 50
Neon Ne Compressed Gas 20.18 * 0.696 -379.8 384.9 19.2 4.97
 
 
Inert SA
Nitrogen N2 Compressed Gas 28.01 * 0.967 -232.4 492.9 13.8 6.97
 
 
Inert SA
Nitrous Oxide N2O Liquefied Gas 44.01 745 1.53 97.6 1054 8.7 9.2
 
 
Oxidant 25
Oxygen O2 Compressed Gas 32.0 * 1.105 -181.1 736.9 12.1 7.03
 
 
Oxidant
 
Phosphine PH3 Liquefied Gas 34.0 592.7 1.184 124.3 948 11.4
 
Treat as Pyrophoric 122 Poison 0.3
Propane C3H8 Liquefied Gas 44.1 109 1.55 206.2 617.4 8.5 17.4 2.1-9.5 874
 
SA
Silane SiH4 Compressed Gas 32.12 * 1.11 24.8 702.7 12.0
 
Pyrophoric
 
 
0.5
Sulfur Dioxide SO2 Liquefied Gas 64.06 34.4 2.26 315 1143 5.9 9.6
 
 
Irritant and Toxic 2
Sulfur Hexafluoride SF6 Liquefied Gas 146.05 310 5.11 114 545 2.5
 
 
 
Inert 1000
Xenon Xe Compressed Gas 131.3 * 4.56 61.9 852.6 2.9 5.02
 
 
Inert SA
*Above critical temperature @ 21.1 °C. SA-Simple asphyxiant