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Product Formula Molecular Weight (lb/lb mol) Critical Temp.
(°F)		 Critical Pressure (psia) Critical Density (lb/ft3) Boiling Point at 1 atm
(°F)		 Heat of Vaporization at BP (Btu/lb) Melting Point
(°F)		 Vapor Pressure (psia) Heat of Vaporization (Btu/lb) Liquid Density (lb/ft3) Gas Density (lb/ft3) Specific Volume (ft3/lb) Specific Gravity (Air=1.0) Specific Heat, Cp
(Btu/lb mol.°F)
Acetylene C2H2 26.04 96.0 906.0 14.39 -119.6 352.5 -113.4 586.3 126.2 23.61 0.068 14.77 0.899 10.53
Air _ 28.96 _ _ _ -317.8 87.8 _ _ _ _ 0.081 12.35 1.000 6.96
Ammonia NH3 17.03 270.1 1636.0 14.67 -28.3 590.3 -107.9 129.0 510.0 38.55 0.044 22.49 0.588 8.69
Argon Ar 39.95 -188.4 705.8 33.17 -302.5 69.4 -308.8 _ _ _ 0.103 9.68 1.379 4.98
Arsine AsH3 77.95 221.8 957.3 37.44 -79.9 92.1 -178.5 217.9 70.2 92.59 0.204 4.91 2.691 9.23
Boron Trichloride BCl3 117.17 353.8 561.3 16.80 55.1 87.8 -160.6 19.7 85.9 81.40 0.314 3.18 4.045 15.55
Boron Trifluoride BF3 67.80 10.0 723.0 36.90 -147.5 109.3 -199.7 _ _ _ 0.176 5.68 2.341 12.08
Bromine Trifluoride BrF3 136.90 9.9 723.0 _ 258.2 134.1 48.0 0.1 134.1 175.61 0.0024 415.08 4.727 15.81
1,3-Butadiene C4H6 54.09 305.6 626.9 15.30 23.7 179.9 -164.1 36.5 169.8 38.67 0.143 6.98 1.868 20.45
Butane C4H10 58.12 305.9 549.9 14.20 31.0 165.9 217.0 31.3 157.1 36.05 0.155 6.45 2.007 23.87
iso-Butane C4H10 58.12 275.0 539.5 13.80 11.2 157.6 -255.3 45.2 143.7 34.49 0.155 6.47 2.007 23.52
1-Butene C4H8 56.11 295.5 569.3 14.60 21.1 172.1 -301.6 38.5 159.9 36.97 0.149 6.70 1.937 20.87
cis-2-Butene C4H8 56.11 320.0 610.2 15.00 53.1 175.0 -217.6 20.3 170.9 29.02 0.151 6.61 1.937 19.50
trans-2-Butene C4H8 56.11 311.0 591.8 14.70 47.3 172.6 -157.5 22.6 167.3 28.46 0.151 6.62 1.937 21.80
Carbon Dioxide CO2 44.01 87.9 1071.0 29.20 -126.5 246.3 -69.9 852.8 63.2 47.64 0.114 8.74 1.519 8.93
Carbon Monoxide CO 28.01 -220.4 507.0 18.79 -312.7 92.1 -337.1 _ _ _ 0.072 13.80 0.967 6.97
Chlorine Cl2 70.91 291.2 1118.4 35.79 -28.8 123.7 -149.8 99.6 109.0 85.54 0.186 5.39 2.448 8.24
Chlorine Trifluoride ClF3 92.45 345.2 837.6 37.50 53.1 115.7 -105.3 21.5 125.5 113.60 0.244 4.09 3.192 15.66
Deuterium D2 4.03 -390.8 241.5 4.20 -417.0 130.9 -426.0 _ _ _ 0.010 96.00 0.139 6.95
Diborane B2H6 27.67 62.1 580.8 10.40 -134.8 230.3 -264.8 _ _ _ 0.072 13.86 0.955 13.79
Dichlorosilane SiH2Cl2 101.01 348.8 678.2 28.90 46.7 _ -187.6 23.3 _ 75.19 0.269 3.72 3.487 14.74
Dimethylamine [(CH3)2NH] 45.09 328.3 769.4 _ 44.0 _ -133.9 26.1 _ 40.90 0.119 8.37 1.557 16.57
Disilane Si2H6 62.22 303.5 746.9 21.10 6.7 147.8 -206.7 47.6 _ 49.90 0.166 6.01 2.148 19.54
Ethane C2H6 30.07 90.4 707.9 12.70 -127.5 210.1 -297.9 559.6 85.0 20.98 0.078 12.76 1.038 12.67
Ethyl Chloride C2H5Cl 64.52 369.0 754.2 20.10 54.0 165.0 -213.5 20.3 161.8 55.78 0.172 5.82 2.227 15.41
Ethylene C2H4 28.05 49.1 736.0 14.17 -154.8 207.5 -272.5 _ _ _ 0.073 13.71 0.969 10.28
Fluorine F2 38.00 -199.9 754.6 35.81 -306.8 74.8 -363.4 _ _ _ 0.098 10.18 1.312 7.49
Halocarbon-23 CHF3 70.01 78.7 701.4 32.20 -115.9 104.0 -247.3 626.0 31.5 49.02 0.182 5.48 2.417 12.29
Halocarbon-116 C2F6 138.01 67.5 432.2 38.00 -108.7 50.4 -149.3 429.9 _ 44.13 0.361 2.77 4.765 25.27
Helium He 4.00 -450.3 33.0 4.33 -452.0 8.8 _ _ _ _ 0.010 96.67 0.138 4.97
Hydrogen H2 2.02 -400.0 190.8 1.88 -423.2 195.3 -434.5 _ _ _ 0.005 191.95 0.070 6.87
Hydrogen Bromide HBr 80.92 194.0 1240.4 45.80 -88.0 93.2 -124.4 311.4 70.3 113.09 0.211 4.74 2.794 7.07
Hydrogen Chloride HCl 36.46 124.5 1199.2 26.22 -120.8 190.6 -173.6 629.1 108.5 51.28 0.095 10.55 1.259 7.29
Hydrogen Fluoride HF 20.01 370.4 972.5 18.20 -108.7 159.6 -118.4 14.13 158.3 61.39 0.177 5.65 4.765 _
Hydrogen Sulfide H2S 34.08 212.8 1306.5 21.77 -74.9 235.9 -122.0 263.6 180.8 48.52 0.089 11.26 1.176 8.29
Krypton Kr 83.80 -82.8 798.0 57.40 -244.1 46.4 -251.3 _ _ _ 0.217 4.61 2.893 4.99
Methane CH4 16.04 -116.2 673.0 10.10 -258.7 219.5 -296.5 _ _ _ 0.042 24.06 0.554 8.53
Methyl Chloride CH3Cl 50.49 290.8 964.0 22.04 -11.2 184.1 -143.9 73.4 163.7 57.52 0.207 4.83 1.740 10.44
Methyl Fluroide CH3F 34.03 112.3 852.2 _ -109.0 _ -223.2 506.3 _ 36.19 0.089 11.23 1.170 9.00
Monomethylamine CH3NH2 31.06 314.4 1082.0 _ 20.4 184.1 -136.2 44.4 _ 41.15 0.082 12.25 1.072 12.02
Neon Ne 20.18 -379.8 384.9 30.15 -410.9 36.9 -415.5 _ _ _ 0.052 19.18 0.697 4.97
Nitrogen N2 28.01 -232.5 492.3 19.40 -320.4 85.6 -345.9 _ _ _ 0.072 13.80 0.967 6.97
Nitrogen Trifluoride NF3 71.00 -38.5 646.9 34.10 -200.2 70.1 -340.2 _ _ _ 0.184 5.43 2.451 12.66
Nitrous Oxide N2O 44.01 97.6 1053.3 28.61 -128.3 160.2 -131.6 751.3 71.7 48.21 0.114 8.74 1.520 9.17
Octafluorocyclobutane C4F8 200.03 239.4 402.8 _ 21.2 _ -40.9 39.9 _ 94.65 0.535 1.87 6.906 37.29
Octafluoropropane C3F8 188.02 161.4 386.1 39.20 -34.3 45.2 -233.8 114.1 34.0 84.66 0.498 2.01 6.491 35.40
Oxygen O2 32.00 -181.8 729.1 26.80 -297.4 91.5 -361.9 _ _ _ 0.083 12.08 1.105 7.03
Phosphine PH3 34.00 124.9 947.9 18.80 -126.0 177.3 -208.8 493.2 _ 35.50 0.088 11.30 1.174 8.93
Propane C3H8 44.10 206.6 617.6 13.70 -43.7 183.0 -305.8 124.9 147.1 31.12 0.116 8.62 1.522 17.71
Propylene C3H6 42.08 197.5 666.3 14.51 -53.8 188.3 -301.4 152.2 146.0 31.92 0.110 9.06 1.453 15.56
Silane SiH4 32.12 25.8 702.5 15.10 -170.4 164.6 -301.0 _ _ _ 0.083 11.98 1.109 10.24
Silicon Tetrachloride SiCl4 169.90 453.0 521.1 32.50 136.6 70.5 -94.0 4.0 75.6 92.13 0.121 8.25 5.866 21.63
Silicon Tetrafluoride SiF4 104.08 6.5 539.3 42.66 -148.3 64.6 -124.2 _ _ _ 0.271 3.69 3.593 17.50
Sulfur Dioxide SO2 64.06 315.5 1142.0 32.78 13.8 167.5 -103.9 50.1 155.0 83.66 0.168 5.95 2.212 9.70
Sulfur Hexafluoride SF6> 146.05 114.0 545.2 46.04 -90.8 48.5 -58.9 310.2 28.2 86.25 0.382 2.62 5.042 22.91
Sulfur Tetrafluoride SF4 108.05 114.0 545.2 _ -53.5 105.3 -184.9 152.7 _ 82.68 0.284 3.53 3.731 18.65
Tetrafluoromethane CF4 88.00 -50.2 543.6 39.06 -198.5 58.5 -298.5 _ _ _ 0.228 4.38 3.038 14.43
Trimethylamine [(CH3)3N] 59.11 320.3 591.8 39.06 37.2 _ -178.8 28.0 _ 39.61 0.157 6.35 2.041 22.03
Tungsten Hexafluoride WF6 297.84 337.7 619.3 81.60 63.0 38.1 -35.6 17.1 37.7 212.58 0.795 1.26 10.283 28.79
Xenon Xe 131.30 61.9 847.1 68.65 -162.6 41.4 -169.4 _ _ _ 0.341 2.93 4.533 5.02
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