Name | Gas Density (NTP) lb/ft3 | Gas Density (NTP) kg/m3 | Boiling Point °F | Boiling Point °C | Critical Pressure psia | Critical Pressure bar | Critical Temperature °F | Critical Temperature °C | Mole Weight | Specific Volume ft3/lb | Specific Volume m3/kg | Specific Gravity (air=1) |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Acetylene | 0.0733 a | 1.17 a | -119.2 | -84 | 897.8 | 63.1 | 95.36 | 35.2 | 26.04 | 14.43 | 0.901 | 0.908 |
Air | 0.0807 a | 1.29 a | -317.8 | -194.4 | 547.4 | 38.5 | -221.08 | -140.6 | 28.85 | 13.3 | 0.83 | 1 |
Ammonia | 0.045 | 0.72 | -28.1 | -33.4 | 1636.1 | 115 | 270.32 | 132.4 | 17.03 | 22.6 | 1.411 | 0.597 |
Argon | 0.1034 | 1.66 | -302.6 | -189.4 | 705.4 | 49.6 | -188.32 | -122.4 | 39.95 | 9.67 | 0.604 | 1.378 |
Arsine | 0.2 | 3.2 | -80.5 | -62.5 | 957 | 67.3 | 211.82 | 99.9 | 77.95 | 5 | 0.312 | 2.69 |
Boron Trichloride | 0.303 | 4.85 | 54.3 | 12.4 | 561.4 | 39.5 | 353.84 | 178.8 | 117.17 | 3.3 | 0.206 | 4.03 |
Boron Trifluoride | 0.1777 | 2.85 | -147.6 | -99.8 | 723 | 50.8 | 10.04 | -12.2 | 67.81 | 5.6 | 0.35 | 2.387 |
Butadiene, 1, 3- | 0.1516 a | 2.43 a | 24.1 | -4.4 | 627.5 | 44.1 | 305.6 | 152 | 54.09 | 6.9 | 0.431 | 1.878 |
Butane, 3- | 0.1588 | 2.54 | 31.1 | -0.5 | 550.7 | 38.7 | 305.6 | 152 | 58.12 | 6.4 | 0.4 | 2.11 |
Butene, 1- | 0.1477 b | 2.37 b | 20.7 | -6.3 | 583.4 | 41 | 295.52 | 146.4 | 56.12 | 6.7 | 0.418 | 1.997 |
Carbon Dioxide | 0.1140 a | 1.83 a | -109.1 | -78.4 | 1070.6 | 75.3 | 87.8 | 31 | 44.01 | 8.76 | 0.5471 | 1.522 |
Carbon Monoxide | 0.0781 a | 1.25 a | -312.7 | -191.5 | 507.4 | 35.7 | -220.36 | -140.2 | 28.01 | 13.8 | 0.862 | 0.967 |
Chlorine | 0.1859 | 2.98 | -29.3 | -34.1 | 1118.4 | 78.6 | 291.2 | 144 | 70.91 | 5.4 | 0.337 | 2.49 |
Deuterium | 0.0112 | 0.18 | -417.1 | -249.5 | 239.2 | 16.8 | -390.82 | -234.9 | 4.03 | 95.9 | 5.987 | 0.1497 |
Dichlorosilane | 0.2601 | 4.17 | 46.8 | 8.2 | 678.2 | 47.7 | 348.8 | 176 | 101.01 | 3.83 | 0.239 | 3.52 |
Disilane | 0.179 | 2.87 | 6.3 | -14.3 | 747.2 | 52.5 | 303.53 | 150.85 | 62.22 | 6.21 | 0.388 | 2.38 |
Ethane | 0.0775 b | 1.24 b | -127.5 | -88.6 | 712.8 | 50.1 | 90.32 | 32.4 | 30.07 | 12.8 | 0.799 | 1.048 |
Ethylene | 0.0787 a | 1.26 a | -154.7 | -103.7 | 742.1 | 52.2 | 49.82 | 9.9 | 28.05 | 13.8 | 0.862 | 0.975 |
Halocarbon 14 | 0.228 | 3.65 | -198.3 | -127.9 | 542.4 | 38.1 | -49.9 | -45.5 | 88 | 4.39 | 0.274 | 3.038 |
Halocarbon 22 | 0.2335 | 3.74 | -41 | -41 | 721.9 | 50.8 | 204.8 | 96 | 86.47 | 4.4 | 0.275 | 3.11 |
Halocarbon 23 | 0.182 | 2.92 | -115.6 | -82 | 697 | 49 | 78.26 | 25.7 | 70.01 | 5.5 | 0.343 | 2.2636 |
Halocarbon 116 | 0.3608 | 5.78 | -108.8 | -78.2 | 432 | 30.4 | 67.5 | 24.3 | 138.01 | 2.8 | 0.175 | 4.773 |
Halocarbon 134A | 0.4683 b | 7.50 b | -15.7 | -26.5 | 589.6 | 41.5 | 213.98 | 101.1 | 102.03 | 2.14 | 0.134 | - |
Halocarbon 218 | 0.5 | 8.01 | -34.1 | -36.7 | 388.7 | 27.3 | 161.42 | 71.9 | 188.02 | 2.02 | 0.126 | 6.69 |
Halocarbon C318 | 0.55 | 8.82 | 21.56 | -5.8 | 403.3 | 27.8 | 238.6 | 114.8 | 200.03 | 1.85 | 0.12 | 7.33 |
Helium | 0.0103 | 0.16 | -452.1 | -268.9 | 33.2 | 2.3 | -450.4 | -268 | 4 | 96.6 | 6.031 | 0.138 |
Hexane, -n | 0.2228 | 3.569 | 155.66 | 68.7 | 430.6 | 29.7 | 453.6 | 234.2 | 86.18 | 4.996 | 0.31 | 0.66 |
Hydrogen | 0.005 | 0.08 | -423 | -252.8 | 188.1 | 13.2 | -399.82 | -239.9 | 2.02 | 191.7 | 11.968 | 0.0696 |
Hydrogen Bromide | 0.208 | 3.33 | -88.1 | -66.7 | 1234.5 | 86.8 | 193.64 | 89.8 | 80.92 | 4.8 | 0.3 | 2.77 |
Hydrogen Chloride | 0.0943 | 1.51 | -121 | 85 | 1197.7 | 82.5 | 124.5 | 51.4 | 36.46 | 10.6 | 0.66 | 1.27 |
Hydrogen Sulfide | 0.089 | 1.43 | -76.5 | -60.3 | 1306.5 | 91.9 | 212.72 | 100.4 | 34.08 | 11.23 | 0.701 | 1.189 |
Isobutane | 0.1553 | 2.49 | 10.9 | -11.7 | 529.1 | 37.2 | 275 | 135 | 58.13 | 6.5 | 0.406 | 2.064 |
Isobutylene | 0.1440 b | 2.31 b | 19.6 | -6.9 | 580.2 | 40.8 | 292.46 | 144.7 | 56.12 | 6.7 | 0.418 | 1.947 |
Krypton | 0.217 | 3.48 | -244.1 | -153.4 | 796.5 | 56 | -82.84 | -63.8 | 83.8 | 4.61 | 0.288 | 2.899 |
Methane | 0.0448 a | 0.72 a | -258.7 | -161.5 | 673.1 | 47.3 | -115.78 | -82.1 | 16.04 | 23.7 | 1.48 | 0.555 |
Methyl Chloride | 0.1319 b | 2.11 b | -11.6 | -24.2 | 2438.1 | 171.4 | 289.58 | 143.1 | 50.49 | 7.6 | 0.474 | 1.784 |
Neon | 0.052 | 0.83 | -411 | -246.1 | 394.7 | 27.8 | -379.66 | -228.7 | 20.18 | 19.21 | 1.199 | 0.696 |
Nitric Oxide | 0.0767 b | 1.23 b | -241.2 | -151.8 | 949.4 | 66.7 | -135.22 | -92.9 | 30.01 | 13 | 0.812 | 1.036 |
Nitrogen | 0.0725 | 1.16 | -320.4 | -195.8 | 492.2 | 34.6 | -237.82 | -149.9 | 28.01 | 13.8 | 0.862 | 0.967 |
Nitrogen Dioxide | 0.2119 | 3.39 | 70.2 | 21.2 | 1469.6 | 103.3 | 316.76 | 158.2 | 46.01 | 4.7 | 0.293 | 2.62 |
Nitrogen Trifluoride | 0.186 | 2.98 | -200.2 | -129 | 657.2 | 46.2 | -38.74 | -39.3 | 71 | 5.4 | 0.337 | 2.46 |
Nitrous Oxide | 0.115 | 1.84 | -127.3 | -88.5 | 1052.2 | 74 | 97.52 | 36.4 | 44.01 | 8.7 | 0.543 | 1.53 |
Oxygen | 0.0828 | 1.33 | -297.4 | -183 | 731.4 | 51.4 | -181.48 | -118.6 | 32 | 12.1 | 0.755 | 1.105 |
Pentane | 0.1866 | 2.988 | 96.93 | 36.07 | 488.63 | 33.69 | 385.7 | 196.5 | 72.15 | 5.4 | 0.337 | 2.491 |
Phosphine | 0.0875 | 1.4 | -125.9 | -87.7 | 947.9 | 66.6 | 124.88 | 51.6 | 34 | 11.4 | 0.712 | 1.184 |
Propane | 0.1166 | 1.87 | -43.8 | -42.1 | 618.7 | 43.5 | 206.24 | 96.8 | 44.11 | 8.5 | 0.531 | 1.55 |
Propylene | 0.1114 | 1.79 | -53.9 | -47.7 | 667.1 | 46.9 | 197.24 | 91.8 | 42.08 | 9.06 | 0.566 | 1.48 |
Silane | 0.0837 | 1.34 | -168.7 | -111.5 | 702.5 | 49.4 | 25.88 | -3.4 | 32.12 | 12.04 | 0.752 | 1.114 |
Silicon Tetrachloride | 0.442 | 7.08 | 135.7 | 57.6 | 573.3 | 40.3 | 454.82 | 234.9 | 169.9 | 2.28 | 0.142 | 5.8 |
Sulfur Dioxide | 0.1666 | 2.67 | 14 | -10 | 1143.5 | 80.4 | 315.68 | 157.6 | 64.06 | 5.9 | 0.368 | 2.263 |
Sulfur Hexafluoride | 0.3845 | 6.16 | -82.8 | -63.8 | 545.2 | 38.3 | 113.9 | 45.5 | 146.05 | 2.5 | 0.156 | 5.11 |
Trichlorosilane | 0.3500 b | 5.61 b | 89.6 | 32 | 597.3 | 42 | 402.08 | 205.6 | 135.45 | 2.85 | 0.178 | 4.7 |
Tungsten Hexafluoride | 0.793 | 12.7 | 67.1 | 19.5 | 629.5 | 44.3 | 339.44 | 170.8 | 297.84 | 1.24 | 0.077 | 10.8 |
Xenon | 0.342 | 5.48 | -162.6 | -108.1 | 846.7 | 59.5 | 61.88 | 16.6 | 131.3 | 2.9 | 0.181 | 4.56 |
Name | Chemical Formula | 2008 TLV ppm | 2008 TLV mg/m3 | Flammable Range LEL air | Flammable Range UEL air | Odor | IDLH ppm |
---|---|---|---|---|---|---|---|
Acetylene | C2H2 | Simple Asphyxiant | Simple Asphyxiant | 2.5 | 100 | Ethereal | |
Air | N/A | N/A | N/A | N/A | N/A | None | |
Ammonia | NH3 | 25 | 17 | 16 | 25 | Pungent, Irritating | 300 |
Argon | Ar | Simple Asphyxiant | Simple Asphyxiant | Nonflammable | Nonflammable | None | |
Arsine | AsH3 | 0.005 | 0.016 | 5.1 | 78 | Garlic-like | 3 |
Boron Trichloride | BCl3 | None Established | None Established | Nonflammable | Nonflammable | Pungent, Irritating | 100 |
Boron Trifluoride | BF3 | C 1.0 | C 3.0 | Nonflammable | Nonflammable | Pungent, Suffocating | 25 |
Butadiene, 1,3- | CH2:CHCH:CH2 | 2 | 4 | 2 | 11.5 | Mildly Aromatic | 2000 |
Butane, n- | C4H10 | 1000 | 2377 | 1.9 | 8.5 | Natural Gas-like | |
Butene, 1- | CH3CH2CH:CH2 | 250 | 574 | 1.6 | 10 | Natural Gas-like | |
Carbon Dioxide | CO2 | 5000 | 9000 | Nonflammable | Nonflammable | None | 40000 |
Carbon Monoxide | CO | 25 | 29 | 12 | 75 | None | 1200 |
Chlorine | Cl2 | 0.5 | 1 | Nonflammable | Nonflammable | Pungent, Irritating | 10 |
Deuterium | D2 | Simple Asphyxiant | Simple Asphyxiant | 5 | 75 | None | |
Dichlorosilane | SiH2Cl2 | None Established | None Established | 4.7 | 99 | Pungent, Suffocating | 100 |
Disilane | (SiH3)2 | 5 | 13 | Unknown, Pyrophoric | Unknown, Pyrophoric | Repulsive, Choking | |
Ethane | C2H6 | 1000 | 1230 | 1000 | 1230 | None | |
Ethylene | CH2:CH2 | 200 | 229 | 2.7 | 36 | Sweet | |
Halocarbon-14 | CF4 | None Established | None Established | Nonflammable | Nonflammable | None | |
Halocarbon-22 | CHClF2 | 1000 | 3537 | Nonflammable | Nonflammable | Nearly Odorless | |
Halocarbon-23 | CHF3 | None Established | None Established | Nonflammable | Nonflammable | None | |
Halocarbon-116 | C2F6 | None Established | None Established | Nonflammable | Nonflammable | None | |
Halocarbon-134A | CF3CH2F | None Established | None Established | Nonflammable | Nonflammable | Slightly Ethereal | |
Halocarbon-218 | C3F8 | None Established | None Established | Nonflammable | Nonflammable | Slightly Sweet | |
Halocarbon-C318 | C4F8 | None Established | None Established | Nonflammable | Nonflammable | None | |
Helium | He | Simple Asphyxiant | Simple Asphyxiant | Nonflammable | Nonflammable | None | |
Hexane, n- | C6H14 | 50 | 180 | 1.1 | 7.5 | Mild | |
Hydrogen | H2 | Simple Asphyxiant | Simple Asphyxiant | 4 | 75 | None | |
Hydrogen Bromide | HBr | C 2.0 | C 7 | Nonflammable | Nonflammable | Irritating | 30 |
Hydrogen Chloride | HCl | C 2.0 | C 3 | Nonflammable | Nonflammable | Pungent, Suffocating | 50 |
Hydrogen Sulfide | H2S | 10 | 14 | 4.3 | 46 | Rotten Eggs | 100 |
Isobutane | CH(CH3)3 | 1000 | 2378 | 1.8 | 8.4 | Slight | |
Isobutylene | (CH3)2C:CH2 | 250 | 574 | 1.8 | 9.6 | Coal Gas | |
Krypton | Kr | Simple Asphyxiant | Simple Asphyxiant | Nonflammable | Nonflammable | None | |
Methane | CH4 | 1000 | 656 | 5 | 15 | None | |
Methyl Chloride | CH3Cl | 50 | 103 | 8.1 | 17.4 | Faintly, Sweet Ethereal | 2000 |
Neon | Ne | Simple Asphyxiant | Simple Asphyxiant | Nonflammable | Nonflammable | None | |
Nitric Oxide | NO | 25 | 31 | Nonflammable | Nonflammable | Slightly Irritating | 100 |
Nitrogen | N2 | Simple Asphyxiant | Simple Asphyxiant | Nonflammable | Nonflammable | None | |
Nitrogen Dioxide | NO2 | 3 | 5.6 | Nonflammable | Nonflammable | Irritating | 20 |
Nitrogen Trifluoride | NF3 | 10 | 29 | Nonflammable | Nonflammable | Mold-like | 1000 |
Nitrous Oxide | N2O | 50 | 90 | Nonflammable | Nonflammable | Slightly Sweet | |
Oxygen | O2 | N/A | N/A | Nonflammable | Nonflammable | None | |
Pentane, n- | C5H12 | 600 | 1770 | 1.5 | 7.8 | Parrafinic | 1500 |
Phosphine | PH3 | 0.3 | 0.42 | 1.6 | 98 | Garlic-Like | 50 |
Propane | C3H8 | 1000 | 1804 | 2.1 | 9.5 | Natural Gas-like | 2100 |
Propylene | CH2:CHCH3 | 500 | 861 | 2 | 11.1 | Slightly Sweet | |
Silane | SiH4 | 5 | 6.6 | 1.4 | 96 | Choking | |
Silicon Tetrachloride | SiCl14 | None Established | None Established | Nonflammable | Nonflammable | Pungent, Suffocating | 100 |
Sulfur Dioxide | SO2 | 2 | 5.2 | Nonflammable | Sharp, | Pungent | 100 |
Sulfur Hexafluoride | SF6 | 1000 | 5973 | Nonflammable | Nonflammable | None | |
Trichlorosilane | SiHCl3 | None Established | None Established | 7 | 83 | Pungent, suffocating | 100 |
Tungsten Hexafluoride | WF6 | None Established | None Established | Nonflammable | Nonflammable | None | 30 |
Xenon | Xe | Simple Asphyxiant | Simple Asphyxiant | Nonflammable | Nonflammable | None |