Critical Constants of Organic Compounds Chris D. Muzny, Vladimir Diky, Andrei Kazakov, Robert D. Chirico, and Michael Frenkel The parameters of the liquid-gas critical point are important constants in determining the behavior of fluids. This table lists the critical temperature, pressure, and molar volume, as well as the normal boiling point, for over 850 organic substances. The properties and their units are: Tb : Normal boiling point in K at a pressure of 101.325 kPa (1 atmosphere); an “s” following the value indicates a sublimation point (temperature at which the solid is in equilibrium with the gas at a pressure of 101.325 kPa) Tc : Critical temperature in K Pc : Critical pressure in MPa Vc : Critical molar volume in cm3 mol–1 The listed values of the critical constants are critically evaluated using the NIST ThermoData Engine, TDE (Ref. 1), designed to implement the dynamic data evaluation concept (Refs. 2–5). This concept requires large electronic databases capable of storing essentially all relevant experimental data known to date with detailed descriptions of metadata and uncertainties. The combination of these electronic databases with expert-system software, designed to automatically generate recommended property values based on available experimental and predicted data, leads to the ability to produce critically evaluated data dynamically or “to order.” The evaluated data have been generated only for compounds for which experimental data for critical properties are available. Group contribution methods such as Joback-Reed (Ref. 6), ConstantinouGani (Ref. 7), Marrero-Pardillo (Ref. 8), and Wilson-Jasperson (Ref. 9) as well as quantitative structure-property relationship (QSPR) methods (Ref. 5) were used within the TDE environment to validate available experimental data. Each recommended value in the table is characterized with a combined expanded uncertainty (Ref. 10) (level of confidence, approximately 95%) listed in parentheses. Only references to original experimental data actually used by TDE to generate critically evaluated data are indicated for each compound. Compounds are listed alphabetically by name. The values of the normal boiling temperatures provided in the table along with the combined expanded uncertainities listed in parentheses have also been critically evaluated using TDE. Additional details on the determination of the normal boiling temperatures using TDE can be found in the Physical Constants of Organic Compounds table in Section 3. The remaining values of the normal boiling temperatures (without uncertainities) are taken from the compilation presented in the 91st Edition of the CRC Handbook of Chemistry and Physics. Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. Acetaldehyde C2 H4 O 293.9(0.6) 462(8) 7.5(1) 154(5) 11–13 Acetic acid C2 H4 O2 391.0(0.2) 593(2) 5.79(0.03) 171(2) 14–21 Acetic anhydride C4 H6 O3 412.6(0.3) 606(1) 4.00(0.08) 294(12) 22 Acetone C3 H6 O 329.23(0.07) 508.1(0.2) 4.7(0.1) 221(20) 18, 23–31 Acetonitrile C2 H3 N 354.8(0.2) 545.47(0.07) 4.88(0.01) 173(59) 32–40 Acetophenone C8 H8 O 475.2(0.2) 709.5(0.7) 4.01(0.05) 373(40) 11, 41 Acetylene C2 H2 188.45 s 308.4(0.4) 6.24(0.04) 119(11) 42–48 Acrylonitrile C3 H3 N 350.3(0.2) 540(2) 4.6(0.1) 211(10) 49 Allene C3 H4 238.3(0.3) 394(4) 6.5(0.7) 167(8) 50 Allyl alcohol C3 H6 O 370.0(0.5) 539.8(0.6) 5.76(0.04) 222(9) 51 Allylamine C3 H7 N 327(2) 540.0(0.7) 4.83(0.03) 217(11) 52 Allyl ethyl ether C5 H10 O 338(4) 518(10) 3(2) 320(10) 21 2-Aminobiphenyl C12 H11 N 571.4(0.2) 838(2) 3.52(0.03) 548(99) 53 2-Aminoethanol C2 H7 NO 443.4(0.4) 671(3) 8.0(0.5) 207(13) 41 2-(2-Aminoethoxy)ethanol C4 H11 NO2 496.2(0.1) 721(4) 4.88(0.1) 333(19) 54 N-(2-Aminoethyl)ethanolamine C4 H12 N2 O 515(5) 739(2) 4.53(0.09) 340(17) 55 Amyl orthosilicate C20 H44 O4 Si 714(14) 57 Aniline C6 H7 N 457.2(0.4) 704(7) 5.3(0.1) 291(3) 39, 40, 58–60 Anisole C7 H8 O 426.8(0.2) 646.1(0.2) 4.2(0.1) 355(12) 25, 39, 40, 49 Benzene C6 H6 353.23(0.07) 562.0(0.1) 4.90(0.02) 257(11) 19, 27, 28, 34, 61–97 Benzeneacetic acid C8 H8 O2 541(2) 766(8) 3.9(0.3) 372(16) 98 Benzenebutanoic acid C10 H12 O2 569(2) 783(8) 3.2(0.2) 493(18) 98 Benzeneethanol C8 H10 O 493(3) 724(4) 4.0(0.2) 390(15) 99 Benzeneheptanoic acid C13 H18 O2 585(27) 798(8) 2.5(0.3) 662(21) 98 Benzenehexanoic acid C12 H16 O2 574(27) 794(8) 2.6(0.3) 611(20) 98 Benzenepentanoic acid C11 H14 O2 583(1) 790(8) 3.1(0.2) 526(19) 98 Benzenepropanoic acid C9 H10 O2 557(2) 776(8) 3.5(0.2) 440(17) 98 Benzo[b]thiophene C8 H6 S 494.0(0.4) 764(2) 4.68(0.04) 359(59) 100 Benzonitrile C7 H5 N 464(1) 691(9) 4.22(0.04) 348(7) 39, 40, 101, 102 Benzophenone C13 H10 O 579.0(0.2) 830(2) 3.0(0.1) 568(44) 101 Benzyl alcohol C7 H8 O 478.4(0.2) 715(3) 4.3(0.2) 333(13) 103 [1,1’-Bicyclohexyl]-2-one C12 H20 O 537 787(70) 3(7) 584(20) 104 6-59 Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 1,1’-Bicyclopentyl C10 H18 463.61(0.03) 690(2) 3.27(0.03) 497(41) 105 Biphenyl C12 H10 528.3(0.3) 773(5) 3.43(0.06) 481(69) 39, 106–109 Bis(2-aminoethyl)amine C4 H13 N3 479.6(0.3) 710(2) 4.43(0.07) 350(21) 55 1,1-Bis(difluoromethoxy)-1,2,2,2- tetrafluoroethane C4 H2 F8 O2 319.78(0.08) 450(1) 2.40(0.08) 410(4) 110 Bis(difluoromethyl) ether C2 H2 F4 O 278.6(0.4) 420.2(0.1) 4.16(0.06) 223(13) 111 Bis(2-ethylhexyl) phthalate C24 H38 O4 657 835(9) 1.1(0.2) 1495(27) 112 Bis(2-hydroxyethyl)methylamine C5 H13 NO2 518(1) 742(4) 4.2(0.4) 404(17) 54 Bis(2,2,2-trifluoroethyl) ether C4 H4 F6 O 336.91 476.31(0.09) 2.78(0.01) 365(1) 113 Bis(trimethylsilyl)methane C7 H20 Si2 406 573.9(0.3) 114 Bromochlorodifluoromethane CBrClF2 269.2(0.7) 428(12) 4.31(0.01) 229(16) 115 Bromodifluoromethane CHBrF2 257.5(0.5) 412.0(0.3) 5.2(0.1) 173(18) 116 Bromoethane C2 H5 Br 311.3(0.6) 503.9(0.4) 6.2(0.1) 214(10) 117, 118 1-Bromo-2-fluorobenzene C6 H4 BrF 427 669.6(0.6) 4.3(0.6) 342(18) 119 1-Bromo-3-fluorobenzene C6 H4 BrF 423 652.0(0.4) 4.2(0.6) 337(18) 119 1-Bromo-4-fluorobenzene C6 H4 BrF 423(2) 654.8(0.4) 4.2(0.2) 338(18) 119 1-Bromopropane C3 H7 Br 343.9(0.2) 536.9(0.1) 4.33(0.06) 271(6) 120 Bromotrifluoromethane CBrF3 215.3(0.4) 340.06(0.05) 3.96(0.01) 199(6) 121 1-Bromo-2-(trifluoromethyl)benzene C7 H4 BrF3 440.7 656.5(0.4) 3.3(0.8) 415(24) 119 1-Bromo-3-(trifluoromethyl)benzene C7 H4 BrF3 424.7 627.1(0.4) 3.2(0.7) 413(24) 119 1-Bromo-4-(trifluoromethyl)benzene C7 H4 BrF3 433 629.8(0.4) 3.2(0.8) 413(24) 119 1,3-Butadiene C4 H6 268.5(0.2) 425(1) 4.35(0.07) 221(23) 122, 123 Butanal C4 H8 O 347.9(0.2) 537(2) 4.41(0.1) 258(9) 104, 124 Butane C4 H10 272.6(0.5) 425.2(0.1) 3.79(0.01) 257(4) 29, 125–139 1,4-Butanediamine C4 H12 N2 429(10) 651(7) 4.5(0.5) 317(14) 140 1,2-Butanediol C4 H10 O2 469.57(0.06) 680(2) 5.4(0.1) 298(12) 141 1,3-Butanediol C4 H10 O2 481.3(0.1) 679(17) 4.7(0.1) 302(67) 54, 141 1,4-Butanediol C4 H10 O2 502.6(0.4) 724(4) 5.5(0.2) 307(14) 49, 55 Butanenitrile C4 H7 N 390.8(0.4) 585.40(0.07) 3.82(0.05) 265(6) 35, 39, 40, 142 1-Butanethiol C4 H10 S 371.5(0.5) 570.1(0.6) 4.01(0.02) 324(12) 143, 144 Butanoic acid C4 H8 O2 436.8(0.1) 623(6) 4.0(0.3) 292(10) 145–147 1-Butanol C4 H10 O 390.8(0.2) 563.0(0.4) 4.43(0.07) 280(14) 34, 80, 148–155 2-Butanol C4 H10 O 372.5(0.2) 535(4) 4.2(0.1) 269(4) 148, 149, 153, 156 2-Butanone C4 H8 O 352.8(0.2) 537(1) 4.18(0.02) 274(30) 25, 30, 33, 34, 38, 157 1-Butene C4 H8 276.87(0.08) 419.3(0.1) 4.00(0.05) 236(14) 123, 158–161 cis-2-Butene C4 H8 274.03(0.09) 435.7(0.2) 4.23(0.02) 235(4) 86, 123, 158 trans-2-Butene C4 H8 266.8(0.2) 428.6(0.1) 4.03(0.02) 238(4) 86, 123, 158 2-Butoxyethanol C6 H14 O2 444(2) 633.9(1) 3.3(0.1) 424(15) 11, 41 1-tert-Butoxy-2-ethoxyethane C8 H18 O2 421.2 585(3) 2.5(0.4) 546(14) 162 2-Butoxyethyl acetate C8 H16 O3 464.2(0.9) 640(2) 2.7(0.2) 551(21) 144, 163 1-tert-Butoxy-2-methoxyethane C7 H16 O2 404(15) 574(1) 2.8(0.7) 480(13) 162 1-Butoxy-2-propanol C7 H16 O2 445(3) 625(1) 2.7(0.1) 479(20) 32 Butyl acetate C6 H12 O2 381(4) 578(10) 3.16(0.06) 403(6) 162, 164–167 sec-Butyl acetate C6 H12 O2 371(1) 571.1(0.5) 3.01(0.1) 398(14) 164, 165 tert-Butyl acetate C6 H12 O2 399.1(0.1) 541(4) 3.0(0.1) 399(7) 54 Butyl acrylate C7 H12 O2 419.8(0.6) 597.4(0.6) 2.76(0.03) 445(7) 51 Butylamine C4 H11 N 335.86(0.08) 531.9(0.2) 4.20(0.04) 291(13) 168 sec-Butylamine C4 H11 N 317.17(0.07) 514.3(0.2) 4.0(0.2) 284(11) 168 tert-Butylamine C4 H11 N 350.1(0.2) 483.7(0.6) 3.85(0.06) 293(23) 75 Butylbenzene C10 H14 446.4(0.4) 660.5(0.1) 2.89(0.03) 498(18) 79, 86, 88 sec-Butylbenzene C10 H14 442.2(0.3) 652(1) 2.94(0.03) 488(39) 58 tert-Butylbenzene C10 H14 456.4(0.3) 648(1) 3.00(0.03) 474(30) 58, 64 Butyl benzoate C11 H14 O2 522(3) 725(14) 2.4(0.3) 594(10) 169 Butyl butanoate C8 H16 O2 438.1(0.1) 612(3) 2.4(0.2) 550(9) 162 Butylcyclohexane C10 H20 444.8(0.4) 653.1(0.4) 2.57(0.07) 547(14) 170, 171 tert-Butylcyclohexane C10 H20 454.0(0.6) 652.0(0.4) 2.82(0.09) 537(15) 170 tert-Butyl ethyl ether C6 H14 O 345.8(0.1) 509(2) 3.0(0.2) 394(4) 172 Butyl methyl ether C5 H12 O 343.2(0.3) 512.7(0.1) 3.37(0.02) 340(2) 25, 173, 174 Butyl propanoate C7 H14 O2 418.2(0.1) 594(1) 2.8(0.2) 464(10) 162 Butyl vinyl ether C6 H12 O 367(1) 540(1) 3.12(0.01) 379(10) 175 γ-Butyrolactone C4 H6 O2 477.8(0.4) 731(1) 5(1) 246(18) 49 6-60 Critical Constants of Organic Compounds Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. Chlorobenzene C6 H5 Cl 404.8(0.2) 632.4(0.1) 4.5(0.1) 303(79) 19, 33, 34 1-Chlorobutane C4 H9 Cl 351.5(0.2) 539.2(0.6) 4.1(0.2) 303(11) 119 2-Chlorobutane C4 H9 Cl 341.4 518.6(0.6) 3.4(0.2) 307(14) 119 1-Chloro-2,4-difluorobenzene C6 H3 ClF2 400 609.6(0.4) 4.0(0.7) 333(16) 119 1-Chloro-2,5-difluorobenzene C6 H3 ClF2 401 612.5(0.4) 4.0(0.7) 333(16) 119 1-Chloro-3,4-difluorobenzene C6 H3 ClF2 400 609.2(0.4) 4.0(0.6) 333(16) 119 1-Chloro-3,5-difluorobenzene C6 H3 ClF2 391.7 592.0(0.4) 3.9(0.7) 327(16) 119 1-Chloro-1,1-difluoroethane C2 H3 ClF2 264.03(0.07) 410.31(0.05) 4.06(0.03) 230(6) 113, 176–178 1-Chloro-2,2-difluoroethene C2 HClF2 254.3(0.5) 400.5(0.7) 4.54(0.07) 197(6) 179 Chlorodifluoromethane CHClF2 232.3(0.5) 369.30(0.05) 4.98(0.01) 165(2) 180–191 2-Chloro-2-(difluoromethoxy)-1,1,1- trifluoroethane C3 H2 ClF5 O 322.4(0.1) 467.8(0.6) 3.05(0.03) 316(24) 192 Chloroethane C2 H5 Cl 285.4(0.2) 460.3(0.4) 5.24(0.04) 198(11) 193 Chloroethene C2 H3 Cl 259.3(0.3) 425(5) 5.60(0.03) 171(9) 194 1-Chloro-2-fluorobenzene C6 H4 ClF 410.8 633.8(0.4) 4.3(0.6) 319(21) 119 1-Chloro-3-fluorobenzene C6 H4 ClF 401(25) 615.9(0.4) 4.2(0.6) 324(21) 119 1-Chloro-4-fluorobenzene C6 H4 ClF 403 620.1(0.4) 4.2(0.4) 322(18) 119 1-Chloroheptane C7 H15 Cl 432(2) 614(8) 3.1(0.6) 492(14) 119 1-Chlorohexane C6 H13 Cl 408.1(0.5) 599(3) 3.3(0.3) 422(12) 119 Chloromethane CH3 Cl 249.0(0.3) 416.24(0.04) 6.72(0.03) 136(2) 195, 196 2-Chloro-2-methylbutane C5 H11 Cl 358(1) 509.1(0.6) 3.2(0.5) 397(15) 119 3-Chloro-3-methylpentane C6 H13 Cl 389 528(3) 3(1) 414(14) 119 2-Chloro-2-methylpropane C4 H9 Cl 324.0(0.5) 497.8(0.1) 3.7(0.4) 308(13) 34 1-Chlorooctane C8 H17 Cl 456(3) 643(2) 2.5(0.4) 543(13) 119 Chloropentafluoroacetone C3 ClF5 O 280.9(0.9) 410.6(0.1) 2.89(0.01) 277(21) 197 Chloropentafluorobenzene C6 ClF5 391.11 570(1) 3.2(0.2) 367(25) 198 Chloropentafluoroethane C2 ClF5 233.9(0.2) 353.0(0.2) 3.141(0.01) 255(4) 199, 200 1-Chloropentane C5 H11 Cl 381.0(0.3) 571.2(0.4) 3.3(0.2) 361(12) 119 1-Chloropropane C3 H7 Cl 319.3(0.5) 503.3(0.4) 4.56(0.04) 268(24) 118, 193, 201, 202 2-Chloropropane C3 H7 Cl 308.1(0.6) 482.4(0.4) 4.25(0.04) 245(16) 201, 202 1-Chloro-1,2,2,2-tetrafluoroethane C2 HClF4 261.19(0.09) 395.43(0.06) 3.62(0.01) 244(4) 203, 204 4-Chlorotoluene C7 H7 Cl 435.0(0.2) 615.9(0.5) 2.33(0.09) 377(16) 88 2-Chloro-1,1,1-trifluoroethane C2 H2 ClF3 279.1(0.6) 425.0(0.2) 4.02(0.02) 232(6) 205 Chlorotrifluoroethene C2 ClF3 244.8(0.3) 380.1(0.1) 3.95(0.03) 214(12) 206, 207 2-Chloro-1,1,2-trifluoroethyl difluoromethyl ether C3 H2 ClF5 O 329.9(0.5) 475.0(0.6) 2.98(0.03) 343(25) 192 Chlorotrifluoromethane CClF3 191.8 301.9(0.2) 3.89(0.01) 180.3(1) 191, 208–216 m-Cresol C7 H8 O 475.3(0.1) 705.8(0.4) 4.4(0.2) 337(12) 39, 40, 217, 218 o-Cresol C7 H8 O 464.1(0.1) 697.6(0.2) 4.2(0.2) 336(12) 217, 218 p-Cresol C7 H8 O 475.0(0.1) 704.6(0.3) 4.1(0.2) 349(13) 217, 218 Cyanogen C2 N2 252.1 397(3) 6.2(0.4) 149(8) 219 Cycloheptane C7 H14 391.9(0.2) 604.2(0.1) 3.85(0.04) 361(12) 34, 220, 221 Cyclohexane C6 H12 353.8(0.7) 553.4(0.3) 4.07(0.01) 307(12) 19, 34, 78, 82, 84, 88, 90, 144, 163, 170, 171, 220, 222–231 Cyclohexanol C6 H12 O 434.0(0.2) 647.1(0.3) 4.3(0.1) 334(33) 49, 232, 233 Cyclohexanone C6 H10 O 428.5(0.1) 665(1) 4.61(0.09) 354(12) 162, 166 Cyclohexene C6 H10 356.0(0.2) 560.45(0.02) 4.43(0.08) 290(20) 86, 201, 202 Cyclohexylamine C6 H13 N 406.8(0.5) 626.8(0.9) 3.9(0.6) 349(15) 170 Cyclooctane C8 H16 424.2(0.1) 647.2(0.4) 3.55(0.06) 417(28) 34, 170, 220, 221 Cyclopentane C5 H10 322.3(0.1) 511.7(0.2) 4.51(0.07) 264(10) 34, 78, 90, 234–236 Cyclopentanol C5 H10 O 413.5(0.2) 619(1) 4.9(0.1) 288(19) 233 Cyclopentanone C5 H8 O 403.6(0.2) 624(2) 4.59(0.05) 276(17) 233 Cyclopentene C5 H8 317.3(0.2) 506.1(0.2) 4.78(0.05) 252(16) 90, 144, 163, 201, 202 Cyclopropane C3 H6 242(2) 398.2(0.4) 5.58(0.02) 164(9) 237, 238 Decafluorobiphenyl C12 F10 480(2) 640(4) 2.3(0.3) 641(40) 239 1,1,1,2,2,3,4,5,5,5-Decafluoro-3,4- bis(trifluoromethyl)-pentane C7 F16 632(5) 240 1,1,1,2,2,3,4,5,5,5-Decafluoro-3-[1,2,2,2- tetrafluoro-1-(trifluoromethyl)ethyl]-4- (trifluoromethyl)pentane C9 F20 399(24) 581(43) 1(2) 800(7) 240 cis-Decahydronaphthalene C10 H18 469.0(0.3) 702(1) 3.2(0.3) 492(19) 241 Critical Constants of Organic Compounds 6-61 Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. trans-Decahydronaphthalene C10 H18 460.4(0.2) 687(1) 3.1(0.1) 499(19) 241 Decamethylcyclopentasiloxane C10 H30 O5 Si5 486(3) 617.4(0.3) 1.04(0.02) 1201(2) 34, 114 Decanal C10 H20 O 485(3) 674(1) 2.6(0.3) 601(14) 163, 242 Decane C10 H22 447.2(0.1) 618.1(0.9) 2.10(0.03) 621(35) 16, 33, 65, 78, 86, 131, 243–252 1,10-Decanediamine C10 H24 N2 535(12) 736(8) 2.4(0.3) 654(28) 140 Decanedioic acid C10 H18 O4 647(5) 845(13) 2.5(0.1) 724(21) 253 Decanoic acid C10 H20 O2 543(1) 724(5) 1.9(0.8) 638(24) 145, 146 1-Decanol C10 H22 O 502(3) 690(10) 2.3(0.1) 624(87) 149, 152, 254, 255 2-Decanol C10 H22 O 484 668.5(0.3) 2.3(0.5) 646(13) 255 3-Decanol C10 H22 O 490(7) 666.1(0.3) 2.3(0.3) 643(13) 255 4-Decanol C10 H22 O 487(3) 663.7(0.3) 2.3(0.1) 643(13) 255 5-Decanol C10 H22 O 489(5) 663.2(0.4) 2.3(0.4) 646(13) 255 2-Decanone C10 H20 O 484(3) 671.8(0.5) 2.2(0.3) 625(25) 256 3-Decanone C10 H20 O 485(4) 668(1) 2.2(0.2) 628(15) 256 4-Decanone C10 H20 O 479.7 662.9(0.5) 2.2(0.2) 636(18) 256 5-Decanone C10 H20 O 477 661.0(0.4) 2.2(0.2) 628(25) 256 1-Decene C10 H20 444(1) 616.0(0.3) 2.157(0.01) 594(3) 257 Decylbenzene C16 H26 571(1) 752(8) 1.72(0.1) 879(29) 258 Dibenzofuran C12 H8 O 558.3(0.3) 824(2) 3.37(0.03) 494(32) 259 Dibenzothiophene C12 H8 S 604.8(0.4) 897(2) 3.9(0.2) 506(108) 260 1,2-Dibromo-1-chloro-1,2,2-trifluoroethane C2 Br2 ClF3 365.9(0.2) 560.6(0.2) 3.61(0.02) 368(4) 261 1,4-Dibromooctafluorobutane C4 Br2 F8 371(25) 532(2) 2.4(0.3) 452(29) 198 Dibutylamine C8 H19 N 435(2) 607.5(0.2) 3.11(0.03) 532(21) 168 1,4-Di-tert-butylbenzene C14 H22 510.4(0.5) 708(2) 2.23(0.01) 732(70) 232 Dibutyl ether C8 H18 O 414.8(0.3) 584.1(0.2) 2.4(0.2) 521(12) 262 Dibutyl phthalate C16 H22 O4 611(9) 797(9) 1.6(0.3) 954(18) 112 m-Dichlorobenzene C6 H4 Cl2 445(2) 685.7(0.4) 4.2(0.2) 366(22) 119 1,4-Dichlorobenzene C6 H4 Cl2 447.0(0.2) 669(5) 3.54(0.07) 364(22) 263 Dichlorodiethylsilane C4 H10 Cl2 Si 403(2) 595.7(0.6) 3.06(0.03) 455(4) 264 Dichlorodifluoromethane CCl2 F2 243.3(0.1) 384.9(0.2) 4.12(0.01) 218(36) 191, 216, 265 Dichlorodimethylsilane C2 H6 Cl2 Si 343.6(0.5) 520.3(0.6) 3.49(0.03) 350(5) 266 1,1-Dichloroethane C2 H4 Cl2 329.4(0.7) 523.4(0.1) 5.1(0.5) 248(12) 267 1,2-Dichloroethane C2 H4 Cl2 356.5(0.1) 561.5(0.4) 5.4(0.1) 225(8) 33, 34, 268, 269 cis-1,2-Dichloroethene C2 H2 Cl2 333(2) 535.8(0.4) 5.4(0.3) 220(15) 34 trans-1,2-Dichloroethene C2 H2 Cl2 320.79(0.08) 515.5(0.2) 5.3(0.2) 216(14) 33, 34 1,1-Dichloro-1-fluoroethane C2 H3 Cl2 F 305.20(0.09) 477.3(0.1) 4.20(0.02) 253.7(0.6) 178, 270 Dichlorofluoromethane CHCl2 F 282.1 451.6(0.4) 5.20(0.01) 196(1) 271 1,2-Dichlorohexafluoropropane C3 Cl2 F6 307(2) 451.8(0.1) 2.63(0.07) 365(48) 272 Dichloromethane CH2 Cl2 312.9(0.3) 508.0(0.2) 6.35(0.05) 177(13) 273 1,2-Dichloropropane C3 H6 Cl2 369.6 578(2) 4.63(0.06) 292(6) 119, 232 1,3-Dichloropropane C3 H6 Cl2 393.9(0.3) 615(3) 4.7(0.5) 299(16) 119 1,1-Dichloro-1,2,2,2-tetrafluoroethane C2 Cl2 F4 276(1) 418.6(0.8) 3.31(0.03) 294(8) 179 1,2-Dichloro-1,1,2,2-tetrafluoroethane C2 Cl2 F4 276.8(0.5) 418.74(0.06) 3.25(0.02) 295(3) 191, 274 1,2-Dichloro-1,1,2-trifluoroethane C2 HCl2 F3 303.1(0.1) 461.6(0.1) 3.77(0.08) 283.2(0.5) 178 2,2-Dichloro-1,1,1-trifluoroethane C2 HCl2 F3 300.9(0.6) 456.8(0.2) 3.67(0.01) 278(2) 182, 275–280 Didecyl phthalate C28 H46 O4 736(4) 870(10) 0.94(0.05) 1807(27) 112 1,1-Diethoxyethane C6 H14 O2 375(2) 539.7(0.4) 3.22(0.08) 426(12) 166 1,2-Diethoxyethane C6 H14 O2 393.8(0.7) 542(3) 2.14(0.02) 432(11) 162 Diethoxymethane C5 H12 O2 359(2) 532(1) 3.4(0.5) 370(10) 162 Diethylamine C4 H11 N 328.5(0.1) 499.5(0.4) 3.75(0.02) 304(32) 38, 117, 133, 281, 282 p-Diethylbenzene C10 H14 457(1) 657.90(0.03) 2.80(0.08) 494(12) 79, 86 Diethylene glycol C4 H10 O3 518.6(0.2) 753(4) 4.8(0.2) 325(19) 283 Diethylene glycol diethyl ether C8 H18 O3 458(4) 612(10) 2.4(0.7) 587(18) 162 Diethylene glycol dimethyl ether C6 H14 O3 435(2) 617(4) 3.0(0.6) 450(16) 162 Diethylene glycol monobutyl ether C8 H18 O3 505(4) 692(3) 2.8(0.6) 546(26) 41 Diethylene glycol monobutyl ether acetate C10 H20 O4 521(2) 694(2) 2.15(0.05) 627(20) 55 Diethylene glycol monoethyl ether C6 H14 O3 475(3) 670(4) 3.2(0.1) 427(23) 49 Diethylene glycol monoethyl ether acetate C8 H16 O4 491(1) 670(12) 2.50(0.06) 524(18) 49, 55 Diethylene glycol monomethyl ether C5 H12 O3 467(2) 672(2) 3.7(0.2) 378(25) 49 Diethylene glycol monopropyl ether C7 H16 O3 488.0(0.4) 680(2) 3.05(0.07) 495(18) 41, 104 6-62 Critical Constants of Organic Compounds Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. Diethyl ether C4 H10 O 307.5(0.5) 466.8(0.3) 3.64(0.01) 280(5) 19, 77, 95, 155, 196, 284–301 Diethyl oxalate C6 H10 O4 459(1) 618(2) 2.14(0.02) 464(37) 101 Diethyl phthalate C12 H14 O4 571(2) 776(9) 2.2(0.2) 687(15) 112 Diethyl succinate C8 H14 O4 490(1) 663(30) 2.26(0.02) 567(44) 101, 302 Diethyl sulfide C4 H10 S 365.2(0.2) 557.5(1) 4.0(0.1) 322(8) 32, 303, 304 m-Difluorobenzene C6 H4 F2 356.1(0.5) 548.4(0.4) 4.20(0.01) 289(21) 119 o-Difluorobenzene C6 H4 F2 367.0(0.5) 566.0(0.4) 4.28(0.01) 290(21) 119 p-Difluorobenzene C6 H4 F2 362.0(0.3) 556.9(0.4) 4.28(0.07) 297(22) 119 1,1-Difluoroethane C2 H4 F2 249.1 386.4(0.1) 4.52(0.01) 178(2) 178, 180, 185, 305–307 1,1-Difluoroethene C2 H2 F2 187.6(0.8) 302.9(0.6) 4.48(0.05) 155(4) 179, 215 2,2-Difluoroethylbis(trifluoromethyl)amine C4 H3 F8 N 324.5 460.20(0.09) 2.64(0.01) 375(1) 308 Difluoromethane CH2 F2 221.50(0.07) 351.28(0.03) 5.79(0.01) 121(4) 306, 309–316 3-Difluoromethoxy-1,1,1,2,2-pentafluoropropane C4 H3 F7 O 319.09 455.1(0.1) 2.77(0.02) 363(1) 113 2-(Difluoromethoxy)-1,1,1-trifluoroethane C3 H3 F5 O 302.3(0.2) 444.9(0.3) 3.43(0.01) 291(19) 113 2,4-Difluorotoluene C7 H6 F2 390 581.4(0.4) 3.7(0.4) 340(21) 119 2,5-Difluorotoluene C7 H6 F2 391 587.8(0.4) 3.8(0.5) 341(21) 119 2,6-Difluorotoluene C7 H6 F2 385 581.8(0.4) 3.7(0.4) 341(21) 119 3,4-Difluorotoluene C7 H6 F2 385 598.5(0.5) 3.8(0.6) 342(22) 119 Diheptyl phthalate C22 H34 O4 633 830(9) 1.24(0.08) 1153(22) 112 Dihexyl phthalate C20 H30 O4 652(5) 817(9) 1.3(0.1) 1061(22) 112 3,4-Dihydro-2H-pyran C5 H8 O 358.6(0.2) 561(2) 4.63(0.08) 268(34) 75 Diisobutylamine C8 H19 N 412.8 584.4(0.2) 3.20(0.06) 518(22) 168 Diisopropylamine C6 H15 N 357(3) 523.1(0.2) 3.02(0.02) 407(18) 168 1,4-Diisopropylbenzene C12 H18 483.4(0.2) 675(1) 2.30(0.04) 610(65) 317 Diisopropyl ether C6 H14 O 341.5(0.2) 500.2(0.7) 2.85(0.04) 386(5) 25, 290, 318, 319 1,2-Dimethoxyethane C4 H10 O2 358.1(0.1) 539(4) 3.91(0.05) 305(9) 162, 166, 175, 290 Dimethoxymethane C3 H8 O2 315.4(0.2) 488(11) 4.0(0.2) 259(10) 75, 162, 320 1,2-Dimethoxypropane C5 H12 O2 369 543(1) 3.4(0.6) 356(12) 162 2,2-Dimethoxypropane C5 H12 O2 350.5(0.7) 510(3) 4(1) 360(13) 162 Dimethyl adipate C8 H14 O4 504(3) 692(14) 2.5(0.5) 561(13) 321 Dimethylamine C2 H7 N 280.4(0.4) 437.5(0.4) 5.34(0.05) 188(13) 193, 322, 323 N,N-Dimethylaniline C8 H11 N 466(1) 687.7(0.6) 3.63(0.09) 407(15) 39, 40 2,2-Dimethylbutane C6 H14 322.8(0.2) 489.1(0.5) 3.10(0.01) 363.74(0.02) 86, 324–328 2,3-Dimethylbutane C6 H14 331.1(0.3) 500.2(0.3) 3.13(0.01) 358(1) 19, 86, 252, 324–330 3,3-Dimethyl-2-butanone C6 H12 O 379.2(0.2) 570.9(0.3) 3.67(0.03) 383(6) 164, 165 2,3-Dimethyl-1-butene C6 H12 328.74(0.04) 497.7(0.9) 3.31(0.01) 346(9) 170 3,3-Dimethyl-1-butene C6 H12 346.34(0.06) 477.4(0.9) 3.18(0.02) 348(10) 170 2,3-Dimethyl-2-butene C6 H12 314.39(0.04) 521.0(0.9) 3.4(0.1) 344(7) 170 Dimethyl carbonate C3 H6 O3 363.26(0.09) 557(1) 4.8(0.2) 251(51) 331, 332 cis-1,3-Dimethylcyclohexane C8 H16 397.5(0.6) 587.7(0.5) 2.88(0.01) 429(10) 64 cis-1,4-Dimethylcyclohexane C8 H16 392.4(0.5) 603.2(0.3) 3.44(0.02) 434(7) 164, 165 trans-1,4-Dimethylcyclohexane C8 H16 397.4(0.7) 588(2) 3.04(0.01) 439(18) 74 Dimethyl disulfide C2 H6 S2 382.87(0.08) 608(4) 5.1(0.1) 266(8) 54 Dimethyl ether C2 H6 O 248.3(0.2) 400.1(0.8) 5.31(0.03) 171(3) 125, 174, 186, 333–343 N,N-Dimethylformamide C3 H7 NO 426.0(0.5) 649.6(0.8) 4.4(0.1) 262(9) 11, 344 Dimethyl glutarate C7 H12 O4 489(4) 682(14) 2.8(0.4) 488(14) 321 2,2-Dimethylheptane C9 H20 406(1) 576.7(0.5) 2.35(0.07) 546(12) 345 2,2-Dimethylhexane C8 H18 379.9(0.4) 549.9(0.4) 2.53(0.03) 481(10) 346 2,3-Dimethylhexane C8 H18 388.8(0.5) 563.5(0.4) 2.63(0.02) 466(16) 346 2,4-Dimethylhexane C8 H18 382.5(0.4) 553(3) 2.55(0.02) 480(39) 330, 346 2,5-Dimethylhexane C8 H18 382.2(0.7) 550.0(0.3) 2.49(0.02) 485(20) 19, 346 3,3-Dimethylhexane C8 H18 385.0(0.6) 562.0(0.4) 2.65(0.02) 450(17) 346 3,4-Dimethylhexane C8 H18 390.8(0.4) 568.8(0.4) 2.69(0.02) 467(21) 346 Dimethyl malonate C5 H8 O4 454.2(0.6) 647(1) 3.5(0.1) 368(13) 317, 321 2,7-Dimethylnaphthalene C12 H12 535.5(0.3) 775(2) 3.02(0.03) 515(45) 347 Dimethyl octanedioate C10 H18 O4 532(8) 723(14) 2.3(0.3) 672(14) 321 Dimethyl oxalate C4 H6 O4 436.5(0.5) 632(14) 4.0(0.3) 315(12) 321, 348 2,2-Dimethyloxirane C4 H8 O 324(2) 500(4) 4.4(0.1) 327(31) 54 2,2-Dimethylpentane C7 H16 352.3(0.3) 520.6(0.6) 2.77(0.04) 409(12) 346, 349 2,3-Dimethylpentane C7 H16 362.9(0.6) 537.5(0.6) 2.92(0.08) 394(23) 346, 349, 350 Critical Constants of Organic Compounds 6-63 Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 2,4-Dimethylpentane C7 H16 353.5(0.5) 520.0(0.7) 2.74(0.06) 415(19) 346, 349 3,3-Dimethylpentane C7 H16 359.1(0.6) 536.4(0.4) 2.94(0.02) 413(24) 346 2,3-Dimethyl-1-pentene C7 H14 357(1) 534(4) 2.9(0.8) 400(11) 170 4,4-Dimethyl-1-pentene C7 H14 345.6(0.2) 516(4) 2.91(0.01) 406(11) 170 Dimethyl phthalate C10 H10 O4 555.8(0.2) 772(9) 2.76(0.08) 557(17) 112 Dimethyl pimelate C9 H16 O4 518(2) 711(14) 2.4(0.1) 608(14) 321 2,3-Dimethylpyridine C7 H9 N 434.2(0.4) 655.5(0.3) 4.03(0.01) 337(28) 86, 351 2,4-Dimethylpyridine C7 H9 N 431.5(0.3) 647.1(0.9) 3.83(0.02) 363(34) 90, 352 2,5-Dimethylpyridine C7 H9 N 430.15(0.05) 644.2(0.3) 4.11(0.04) 371(45) 86 2,6-Dimethylpyridine C7 H9 N 417.1(0.1) 623.8(0.2) 3.80(0.04) 353(43) 90 3,4-Dimethylpyridine C7 H9 N 452.2(0.3) 683.8(0.4) 4.06(0.01) 353(13) 86, 351, 352 3,5-Dimethylpyridine C7 H9 N 445.0(0.1) 667.3(0.3) 3.84(0.02) 369(12) 86, 351 2,6-Dimethylquinoline C11 H11 N 541.2(0.4) 786(2) 3.27(0.02) 505(24) 529 Dimethyl sebacate C12 H22 O4 562(3) 742(14) 2.1(0.2) 695(14) 321 Dimethyl succinate C6 H10 O4 470(1) 662(14) 3.5(0.2) 426(16) 321 Dimethyl sulfide C2 H6 S 310.47(0.05) 503.0(0.3) 5.40(0.06) 201(9) 52, 117, 304 Dimethyl sulfoxide C2 H6 OS 465.0(0.9) 707(1) 4.6(0.7) 228(7) 23 1,3-Dimethyl-1,1,3,3-tetraphenyldisiloxane C26 H26 OSi2 701(2) 893(9) 1.38(0.1) 1300(89) 353 1,3-Dimethyltricyclo[3.3.1.13,7 ]decane C12 H20 476.53 708(2) 2.86(0.01) 595(115) 141 Dinonyl phthalate C26 H42 O4 686 858(9) 1.0(0.3) 1652(26) 112 Dioctyl phthalate C24 H38 O4 688(4) 840(9) 1.1(0.1) 1510(22) 112 1,4-Dioxane C4 H8 O2 374.3(0.3) 587.3(0.1) 5.2(0.2) 251(5) 34, 290, 354 Dipentyl phthalate C18 H26 O4 614(40) 811(9) 1.4(0.7) 957(21) 112 Diphenyl ether C12 H10 O 531.1(0.1) 766.9(0.8) 3.10(0.04) 526(23) 25, 355 Diphenylmethane C13 H12 537.3(0.3) 776(9) 3.02(0.07) 546(144) 39, 302, 356, 357 1,3-Diphenyltetramethyldisiloxane C16 H22 OSi2 750(8) 353 Dipropylamine C6 H15 N 380.6(0.9) 555.8(0.1) 3.6(0.1) 414(15) 168 Dipropylene glycol C6 H14 O3 504(2) 705(4) 3.4(0.1) 444(18) 54 Dipropyl ether C6 H14 O 363.2(0.3) 531(2) 2.92(0.05) 402(8) 25, 52 Dipropyl phthalate C14 H18 O4 592(2) 784(9) 1.9(0.1) 816(20) 112 Diundecyl phthalate C30 H50 O4 711(25) 886(10) 0.89(0.1) 1590(25) 112 Docosane C22 H46 642(5) 786(6) 1.0(0.1) 1434(50) 62, 358, 359 Docosanoic acid C22 H44 O2 693(3) 837(8) 1.11(0.08) 1485(29) 360 1-Docosanol C22 H46 O 680(12) 827(8) 1.0(0.6) 1243(20) 361 1,2,2,3,3,4,4,5,5,6,6,7-Dodecafluoro-1-heptanol C7 H4 F12 O 444.7(0.7) 589(5) 2.0(0.2) 620(34) 362 Dodecane C12 H26 489.4(0.2) 658.8(0.9) 1.80(0.09) 747(18) 34, 86, 118, 243, 244, 363, 364 1,12-Dodecanediamine C12 H28 N2 572(13) 767(8) 2.0(0.3) 765(37) 140 Dodecanedioic acid C12 H22 O4 621(10) 859(13) 2.1(0.2) 730(19) 253 1-Dodecanethiol C12 H26 S 550(3) 734(4) 1.81(0.1) 726(25) 99 Dodecanoic acid C12 H24 O2 572(1) 743(7) 1.9(0.2) 787(19) 360 1-Dodecanol C12 H26 O 537.2(0.3) 719.4(0.6) 2.02(0.05) 805(15) 149 2-Dodecanone C12 H24 O 520(6) 702(4) 1.9(0.9) 742(20) 256 3-Dodecanone C12 H24 O 523(3) 701(2) 1.9(0.2) 680(19) 256 4-Dodecanone C12 H24 O 528(5) 697(2) 1.9(0.4) 672(19) 256 5-Dodecanone C12 H24 O 521(4) 695(5) 1.9(0.4) 678(19) 256 6-Dodecanone C12 H24 O 522(4) 694(2) 1.9(0.3) 677(19) 256 1-Dodecene C12 H24 486.5(0.9) 657.6(0.6) 1.88(0.01) 710(15) 257 Eicosane C20 H42 617.2(0.9) 768(6) 1.08(0.05) 1325(48) 358, 359 Eicosanoic acid C20 H40 O2 673(6) 820(8) 1.2(0.1) 1346(27) 360 1-Eicosanol C20 H42 O 629 808(8) 1.1(0.2) 1130(18) 361 1-Eicosene C20 H40 620(15) 772(15) 1.1(0.3) 1213(36) 365 Ethane C2 H6 184.5(0.4) 305.36(0.04) 4.88(0.01) 146(3) 44, 48, 92, 131, 132, 134, 214, 215, 229, 246, 366–393 1,2-Ethanediamine C2 H8 N2 390.0(0.5) 613.1(0.3) 6.71(0.04) 204(13) 49 1,2-Ethanediol C2 H6 O2 470.6(0.1) 719(5) 8.1(0.4) 180(11) 11, 32, 41, 394 1,1-Ethanediol, diacetate C6 H10 O4 441(3) 618(4) 2.9(0.1) 457(13) 54 Ethanethiol C2 H6 S 308.1(0.1) 498.7(0.3) 5.53(0.08) 208(10) 304 6-64 Critical Constants of Organic Compounds Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. Ethanol C2 H6 O 351.39(0.09) 515(1) 6.25(0.04) 169(4) 19, 25, 34, 80, 85, 128, 148–150, 152, 222, 395–409 Ethoxybenzene C8 H10 O 443.0(0.2) 647(2) 3.45(0.05) 407(16) 39, 40 2-Ethoxyethyl acetate C6 H12 O3 429.8(0.4) 609(2) 3.07(0.03) 443(38) 141, 144, 163 2-Ethoxy-2-methylbutane C7 H16 O 374.6(0.4) 546(2) 2.83(0.09) 448(29) 410 1-Ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane C6 H5 F9 O 350.04 482.0(0.1) 1.98(0.01) 518(2) 113 Ethyl acetate C4 H8 O2 350.2(0.2) 523.27(0.07) 3.88(0.02) 288(19) 19, 23, 400, 411–413 Ethylamine C2 H7 N 289.8(0.2) 456.5(0.9) 5.6(0.1) 183(22) 193, 414 Ethylbenzene C8 H10 409.3(0.4) 617.1(0.1) 3.61(0.01) 365(61) 68, 78, 79, 86, 88, 172, 345 Ethyl benzoate C9 H10 O2 485.6(0.2) 700(14) 3.01(0.05) 470(12) 169 Ethyl butanoate C6 H12 O2 394.2(0.4) 566.1(0.1) 3.2(0.3) 421(30) 415, 416 Ethyl trans-2-butenoate C6 H10 O2 413(5) 599(10) 3(2) 382(7) 21 Ethylcyclohexane C8 H16 404.9(0.4) 606.9(0.4) 3.27(0.04) 431(12) 170, 171 Ethylcyclopentane C7 H14 376.6(0.6) 569.48(0.05) 3.40(0.07) 377(3) 236 Ethyl 2,2-dimethylpropanoate C7 H14 O2 391.4(0.4) 566(2) 2.88(0.02) 461(8) 417 Ethylene C2 H4 169.3(0.3) 282.35(0.03) 5.06(0.01) 130.9(0.2) 61, 246, 371, 418–436 Ethyl 3-ethoxypropanoate C7 H14 O3 441(2) 621(3) 2.7(0.1) 478(19) 11, 41 Ethyl formate C3 H6 O2 327.2(0.1) 508.5(0.5) 4.78(0.03) 223(47) 413, 415 Ethyl heptanoate C9 H18 O2 461(2) 634(1) 2.3(0.2) 587(8) 162 3-Ethylhexane C8 H18 391.6(0.5) 565.5(0.4) 2.61(0.02) 450(15) 346 Ethyl hexanoate C8 H16 O2 438(1) 615(1) 2.6(0.2) 528(8) 162 2-Ethylhexanoic acid C8 H16 O2 500.6(0.1) 674(1) 2.75(0.06) 543(8) 144, 163 2-Ethyl-1-hexanol C8 H18 O 459.3(0.2) 640.2(0.3) 3.0(0.2) 508(29) 437 2-Ethylhexyl acetate C10 H20 O2 473(1) 642(2) 2.02(0.01) 644(10) 410 Ethyl 3-methylbutanoate C7 H14 O2 408(3) 584(6) 3(1) 463(9) 147, 162 Ethyl methyl ether C3 H8 O 279(2) 437.8(0.2) 4.39(0.06) 219(5) 174, 304, 438 3-Ethyl-2-methylpentane C8 H18 388.8(0.6) 567.1(0.4) 2.70(0.02) 442(22) 346 3-Ethyl-3-methylpentane C8 H18 391.3(0.9) 576.5(0.4) 2.77(0.01) 463(13) 346 Ethyl 2-methylpropanoate C6 H12 O2 384(2) 554(4) 3.1(0.3) 421(76) 415 Ethyl methyl sulfide C3 H8 S 339.8(0.3) 533(10) 4.62(0.03) 260(6) 303 Ethyl nonanoate C11 H22 O2 497(5) 664(1) 2.0(0.4) 715(8) 162 Ethyl octanoate C10 H20 O2 479(1) 652(12) 2(2) 657(8) 147, 162 3-Ethylpentane C7 H16 366.5(0.4) 540.7(0.4) 2.90(0.03) 412(14) 346, 349 Ethyl pentanoate C7 H14 O2 415(3) 593(1) 2.8(0.4) 466(10) 162 2-Ethylphenol C8 H10 O 477.6(0.1) 703(1) 3.7(0.3) 388(15) 218 3-Ethylphenol C8 H10 O 491.5(0.1) 716(1) 3.8(0.3) 393(15) 218 4-Ethylphenol C8 H10 O 491.12(0.06) 716(1) 3.1(0.6) 395(15) 218 Ethyl propanoate C5 H10 O2 372.0(0.2) 547(1) 3.37(0.05) 343(23) 19, 64, 162, 413, 415 Ethyl propyl ether C5 H12 O 336(3) 500.2(0.4) 3.37(0.01) 343(44) 25, 304 S-Ethyl thioacetate C4 H8 OS 387(3) 590.5(0.2) 4.1(0.1) 320(10) 49 4-Ethyltoluene C9 H12 435.1(0.6) 640.2(0.5) 3.23(0.04) 446(12) 439, 440 Ethyl vinyl ether C4 H8 O 309(2) 475(2) 4.06(0.04) 262(8) 290 Fluorobenzene C6 H5 F 357.8(0.3) 560.10(0.07) 4.55(0.01) 272(9) 86, 441 Fluoroethane C2 H5 F 235.4(0.3) 375.2(0.2) 5.02(0.01) 164(3) 206, 442, 443 Fluoromethane CH3 F 194.8 317.42(0.01) 5.88(0.01) 112.41(0.01) 444, 445 2-Fluorotoluene C7 H7 F 387(2) 591.2(0.4) 3.9(0.3) 323(47) 119 3-Fluorotoluene C7 H7 F 389(2) 591.8(0.4) 3.9(0.3) 332(17) 119 4-Fluorotoluene C7 H7 F 389.8(0.4) 592.1(0.8) 3.85(0.01) 332(17) 119 Formic acid CH2 O2 374 588(10) 115.88(0.08) 146 Furan C4 H4 O 304.4(0.2) 490.2(0.2) 5.43(0.08) 218(3) 241, 290 Glycerol C3 H8 O3 562(3) 850(9) 7.6(0.8) 251(15) 394 Heneicosane C21 H44 632(6) 778(8) 1.0(0.1) 1366(48) 359 Heptadecane C17 H36 576(2) 736(1) 1.33(0.07) 1081(28) 359 Heptadecanoic acid C17 H34 O2 635(4) 792(8) 1.4(0.1) 1130(24) 360 1-Heptadecanol C17 H36 O 597 780(8) 1.4(0.1) 1097(18) 361 1-Heptadecene C17 H34 574(3) 734(7) 1.34(0.08) 1053(35) 365 2,2,3,3,5,5,6-Heptafluoro-1,4-dioxane C4 HF7 O2 312.5(0.1) 453(1) 2.86(0.06) 359(4) 110 1,1,1,2,2,3,3-Heptafluoropentan-4-one C5 H3 F7 O 337.4 476.55(0.08) 2.57(0.01) 394.2(0.7) 308 Critical Constants of Organic Compounds 6-65 Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 1,1,1,2,3,3,3-Heptafluoropropane C3 HF7 257.65 375.0(0.1) 2.93(0.01) 299(7) 446–449 1,1,1,2,4,4,4-Heptafluoro-2- trifluoromethoxybutane C5 H2 F10 O 322.73(0.09) 447(1) 2.15(0.06) 465(5) 110 1,1,1,2,2,3,3-Heptafluoro-3-(trifluoromethoxy) propane C4 F10 O 280.0(0.4) 391.7(0.7) 1.89(0.05) 431(31) 450 2,2,4,4,6,8,8-Heptamethylnonane C16 H34 519(1) 692(4) 1.53(0.01) 957(27) 451 1,1,1,3,5,5,5-Heptamethyltrisiloxane C7 H22 O2 Si3 416(1) 553.4(0.6) 1.48(0.02) 828(3) 452 Heptanal C7 H14 O 426(3) 616.8(0.4) 3.2(0.2) 434(7) 242 2-Heptanamine C7 H17 N 414(4) 598(2) 2.9(0.3) 455(18) 170 Heptane C7 H16 371.53(0.07) 540.1(0.2) 2.74(0.01) 428(15) 34, 36, 62, 75, 78, 86, 131, 133–135, 157, 243, 244, 254, 286, 324, 346, 359, 394, 432, 453–463 Heptanedioic acid C7 H12 O4 615.1 842(13) 3.3(0.2) 463(15) 253 Heptanoic acid C7 H14 O2 495(2) 678(2) 3.0(0.3) 476(5) 145, 146, 464 1-Heptanol C7 H16 O 451(1) 632.4(0.6) 3.1(0.2) 430(9) 149, 254, 465 2-Heptanol C7 H16 O 432 608.4(0.6) 3.0(0.1) 442(2) 149, 465 3-Heptanol C7 H16 O 436(2) 605.4(0.3) 3.1(0.4) 451(3) 465 4-Heptanol C7 H16 O 434(2) 602.6(0.3) 3.1(0.6) 455(4) 465 2-Heptanone C7 H14 O 424.1(0.3) 611.4(0.2) 2.98(0.04) 436(4) 25, 172, 466 3-Heptanone C7 H14 O 419(2) 606.6(0.2) 3.0(0.1) 433(5) 466 4-Heptanone C7 H14 O 417(1) 602.0(0.2) 3.0(0.3) 434(5) 466 1-Heptene C7 H14 370(2) 537.3(0.3) 2.85(0.02) 409(2) 51, 52, 86, 124, 257, 467 cis-2-Heptene C7 H14 371(2) 548.5(0.6) 3.0(0.3) 410(7) 170 trans-2-Heptene C7 H14 369(2) 542.8(0.4) 3.0(0.2) 410(7) 170 trans-3-Heptene C7 H14 367(1) 538.6(0.7) 3.0(0.2) 411(7) 170 Heptylbenzene C13 H20 515(4) 708(7) 2.1(0.2) 680(16) 258 Heptyl orthosilicate C28 H60 O4 Si 778(16) 57 Hexacosane C26 H54 688(11) 816(8) 0.8(0.2) 1740(59) 358 Hexadecane C16 H34 560.0(0.7) 722.2(0.8) 1.4(0.2) 1009(53) 34, 244, 245 Hexadecanoic acid C16 H32 O2 624(6) 785(8) 1.5(0.2) 1059(23) 360 1-Hexadecanol C16 H34 O 598(2) 770(8) 1.47(0.1) 1019(17) 361 1-Hexadecene C16 H32 558(1) 718(7) 1.4(0.2) 986(33) 365 Hexaethyldisiloxane C12 H30 OSi2 525(7) 692.9(0.1) 1.7(0.7) 955(2) 34 Hexafluoroacetylacetone C5 H2 F6 O2 342(2) 485.1(0.5) 2.9(0.2) 313(49) 468 Hexafluorobenzene C6 F6 353.3(0.2) 516.4(0.5) 3.28(0.01) 337(4) 74, 198, 286, 469–473 2,2,4,4,5,5-Hexafluoro-1,3-dioxolane C3 F6 O2 251.0(0.2) 368.1(0.7) 2.72(0.04) 293(30) 116 Hexafluoroethane C2 F6 195.0(0.1) 292.9(0.2) 3.03(0.01) 223(3) 172, 474–477 1,1,1,3,3,3-Hexafluoro-2-methoxy-2- (trifluoromethyl)propane C5 H3 F9 O 327(1) 463(1) 2.37(0.07) 448(5) 110 1,1,1,2,3,3-Hexafluoro-3-(2,2,3,3,3- pentafluoropropoxy)propane C6 H3 F11 O 360.64 486.48(0.07) 1.95(0.01) 529(2) 113 1,1,1,2,3,3-Hexafluoropropane C3 H2 F6 277.65 412.40(0.06) 3.42(0.01) 270(5) 203, 447, 448, 478, 479 1,1,1,3,3,3-Hexafluoropropane C3 H2 F6 271.8(0.2) 398.07(0.06) 3.18(0.01) 262(18) 203 1,1,1,2,3,3-Hexafluoro-3-(2,2,3,3- tetrafluoropropoxy)propane C6 H4 F10 O 379.07 516.2(0.3) 2.2(0.2) 543(34) 113 1,1,1,2,3,3-Hexafluoro-3-(2,2,2-trifluoroethoxy) propane C5 H3 F9 O 345.87 475.74(0.09) 2.23(0.02) 455(2) 113 Hexamethylbenzene C12 H18 541(3) 758(2) 2.6(0.4) 581(15) 25 1,1,1,5,5,5-Hexamethyl-3,3-bis[(trimethylsilyl) oxy]trisiloxane C12 H36 O4 Si5 494.6(0.2) 622.6(0.2) 1.03(0.02) 1323(90) 34 Hexamethyldisiloxane C6 H18 OSi2 373.6(0.3) 518.7(0.6) 1.95(0.02) 629(15) 480 2,6,10,15,19,23-Hexamethyltetracosane C30 H62 693(6) 796(2) 0.60(0.04) 2060(70) 481 Hexanal C6 H12 O 402.8(0.4) 592(3) 3.4(0.2) 378(7) 163, 242 Hexane C6 H14 341.87(0.06) 507.5(0.1) 3.03(0.01) 366.0(0.8) 19, 29, 33, 34, 38, 52, 77, 78, 84, 86, 96, 106, 124, 131, 133, 134, 243, 244, 254, 281, 286, 318, 324–328, 401, 456, 458, 470, 482–488 1,6-Hexanediamine C6 H16 N2 470(2) 685(7) 3.6(0.5) 446(17) 140 6-66 Critical Constants of Organic Compounds Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 1,6-Hexanedioic acid C6 H10 O4 610.5 841(13) 3.8(0.3) 449(17) 253 1,6-Hexanediol C6 H14 O2 481 741(10) 4.1(0.1) 404(13) 489 Hexanenitrile C6 H11 N 436.6(0.3) 633.8(0.2) 2.99(0.06) 378(8) 35 Hexanoic acid C6 H12 O2 478.0(0.6) 661(7) 413(15) 145, 146, 360, 464 1-Hexanol C6 H14 O 430.0(0.7) 611.0(0.4) 3.40(0.09) 381(30) 34, 149, 151, 152, 254, 255, 456 2-Hexanol C6 H14 O 413 585.9(0.5) 3.3(0.3) 406(8) 149, 255, 437 3-Hexanol C6 H14 O 416(2) 582.4(0.4) 3.3(0.1) 378(14) 64, 254, 255 2-Hexanone C6 H12 O 400.8(0.1) 586.7(0.5) 3.31(0.04) 377(4) 25, 172, 466 3-Hexanone C6 H12 O 396.6(0.3) 583.1(0.5) 3.32(0.01) 378(4) 25, 466 Hexatriacontane C36 H74 777(7) 872(9) 0.47(0.07) 2711(2) 358 1-Hexene C6 H12 336.5(0.1) 504.1(0.9) 3.20(0.03) 381(9) 86, 201, 202, 252, 257, 490 cis-2-Hexene C6 H12 342.0(0.5) 513.4(0.9) 3.34(0.06) 347(7) 170 trans-2-Hexene C6 H12 341.00(0.09) 509.0(0.7) 3.16(0.01) 353(7) 170 cis-3-Hexene C6 H12 339.5(0.5) 510(1) 3.29(0.01) 351(7) 170 trans-3-Hexene C6 H12 340.21(0.09) 507(2) 3.18(0.01) 352(7) 170 5-Hexen-2-one C6 H10 O 402.2(0.5) 593.5(0.6) 3.51(0.04) 359(10) 51 Hexyl acetate C8 H16 O2 444.2(0.7) 618(1) 2.5(0.1) 526(8) 162 Hexylamine C6 H15 N 405(1) 592.3(0.7) 3.4(0.3) 402(15) 170 Hexylbenzene C12 H18 499(2) 695(7) 2.4(0.2) 620(14) 258 Hexyl benzoate C13 H18 O2 550(26) 748(14) 2.0(0.3) 658(14) 169 Indan C9 H10 451.0(0.4) 684.8(0.4) 3.95(0.03) 385(22) 25 Isobutanal C4 H8 O 337.2(0.2) 543.6(0.6) 5.12(0.08) 283(10) 164, 165 Isobutane C4 H10 261.4(0.5) 407.84(0.07) 3.64(0.02) 256(7) 125, 132, 491, 492 Isobutene C4 H8 266.1(0.2) 418.0(0.3) 4.00(0.04) 240(3) 123, 158, 493, 494 Isobutyl acetate C6 H12 O2 390.0(0.6) 562(2) 2.97(0.06) 369(37) 166, 201, 202, 415 Isobutylbenzene C10 H14 445.8(0.4) 650(3) 3.0(0.2) 493(15) 96 Isobutyl butanoate C8 H16 O2 430(1) 611(6) 2.5(0.3) 524(9) 147 Isobutylcyclohexane C10 H20 444.5 642.1(0.6) 2.61(0.07) 550(14) 170 Isobutyl formate C5 H10 O2 371.5(0.3) 551(4) 3.9(0.4) 359(25) 415 Isobutyl isobutanoate C8 H16 O2 421(3) 602(6) 2.5(0.8) 530(9) 147 Isobutyl 3-methylbutanoate C9 H18 O2 442(3) 621(6) 2.3(0.7) 581(9) 147 Isobutyl propanoate C7 H14 O2 409(2) 586(8) 3(1) 462(9) 162, 167 Isopentane C5 H12 300.98(0.06) 460.37(0.09) 3.35(0.06) 313(17) 19, 86, 96, 127, 495 Isopentyl acetate C7 H14 O2 414.8(0.7) 586.1(0.4) 2.76(0.07) 464(9) 166 Isopentyl butanoate C9 H18 O2 458.0(0.3) 619(6) 3(1) 595(10) 147 Isopentyl nitrite C5 H11 NO2 372(3) 626(16) 5.07(0.04) 386.2(0.1) 52 Isopentyl propanoate C8 H16 O2 446(4) 611(6) 2.5(0.9) 523(9) 147 Isopropyl acetate C5 H10 O2 361.8(0.2) 531.1(0.6) 3.31(0.04) 343(4) 64, 166, 172, 411, 490 Isopropylamine C3 H9 N 304.9(0.2) 472.2(0.9) 4.55(0.07) 231(5) 75, 170 Isopropylbenzene C9 H12 425.5(0.2) 631(1) 3.2(0.1) 423(5) 79, 90, 96, 172 Isopropylcyclohexane C9 H18 427.5(0.4) 632.2(0.4) 3.1(0.2) 484(14) 170 Isopropyl formate C4 H8 O2 341(2) 534.6(0.5) 3.95(0.03) 294(11) 164, 165 1-Isopropyl-4-methylbenzene C10 H14 450(2) 654(8) 2.8(0.1) 495(16) 96, 147 (1S,2R,5S)-2-Isopropyl-5-methylcyclohexanol C10 H20 O 489(3) 694(5) 2.7(0.6) 539(14) 302 Isopropyl methyl ether C4 H10 O 303.9(0.5) 464.4(0.2) 3.76(0.01) 287(11) 25 Isoquinoline C9 H7 N 516.3(0.6) 803(8) 5.07(0.03) 380(17) 218 d-Limonene C10 H16 450.8(0.5) 653(2) 2.81(0.02) 498(11) 496 Mesityl oxide C6 H10 O 402.8(0.4) 605(2) 3.85(0.02) 353(27) 497 Methane CH4 111.6(0.2) 190.56(0.02) 4.60(0.01) 99(3) 132, 134, 498–508 Methane-d4 CD4 189.2(0.6) 98(3) 507 Methanethiol CH4 S 279.1(0.1) 469.9(0.3) 7.24(0.09) 148(4) 304 Methanol CH4 O 337.6(0.7) 512.7(0.6) 8.01(0.03) 117(4) 19, 38, 67, 80, 85, 87, 131, 148, 152, 155, 196, 405, 458, 482, 509–516 1-Methoxy-2,4-dimethylbenzene C9 H12 O 465 682(4) 3.2(0.7) 451(18) 162 2-Methoxy-1,4-dimethylbenzene C9 H12 O 467 677(1) 3.2(0.7) 451(15) 162 2-Methoxyethanol C3 H8 O2 397.4(0.1) 598(1) 5.28(0.08) 263(6) 49 2-Methoxyethyl acetate C5 H10 O3 415(3) 603(3) 3.6(0.5) 368(15) 162 Critical Constants of Organic Compounds 6-67 Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 4-Methoxy-1,1,1,2,2,3,3-heptafluorobutane C5 H5 F7 O 344.13 481.5(0.2) 2.38(0.01) 431(2) 113 1-Methoxy-1,1,2,2,3,3-hexafluoropropane C4 H4 F6 O 341.02 487.0(0.3) 2.9(0.1) 370(25) 113 2-Methoxy-2-methylbutane C6 H14 O 359.5(0.1) 536(2) 3.23(0.09) 372(19) 172, 410, 517 5-Methoxy-1,1,2,2,3,3,4,4-octafluoropentane C6 H6 F8 O 395.83 546.1(0.3) 2.40(0.07) 493(30) 113 1-Methoxy-2-propanol C4 H10 O2 393.1(0.6) 579.8(0.3) 4.11(0.04) 304(12) 49 2-Methoxypropene C4 H8 O 308.8(0.3) 478.5(0.6) 4.2(0.3) 257(13) 518 Methyl acetate C3 H6 O2 329.8(0.2) 506.7(0.4) 4.73(0.07) 227(22) 19, 411–413 Methylamine CH5 N 266.8(0.3) 430.6(0.6) 7.61(0.09) 139(1) 130, 193, 322, 323 N-Methylaniline C7 H9 N 470(1) 702(5) 5.2(0.6) 347(16) 117 2-Methylaniline C7 H9 N 473.1(0.4) 710(1) 3.6(0.1) 377(52) 519 3-Methylaniline C7 H9 N 476.4(0.5) 709(10) 4.6(0.5) 346(17) 106 4-Methylaniline C7 H9 N 474(1) 667(10) 3.3(0.7) 334(16) 106 2-Methylanisole C8 H10 O 446(2) 662(1) 3.6(0.3) 397(18) 162 3-Methylanisole C8 H10 O 450(2) 665(1) 3.6(0.3) 449(22) 162 4-Methylanisole C8 H10 O 448(2) 667(1) 3.6(0.4) 396(15) 162 α-Methylbenzenemethanol C8 H10 O 478(4) 699(5) 3.8(0.7) 399(16) 32 Methyl benzoate C8 H8 O2 472(2) 702(1) 3.8(0.1) 408(11) 517 2-Methylbutanal C5 H10 O 363(2) 531.6(0.1) 4.04(0.03) 318(10) 124 Methyl butanoate C5 H10 O2 375.0(0.1) 554.4(0.1) 3.49(0.08) 341(20) 19, 413, 416 3-Methylbutanoic acid C5 H10 O2 449.6(0.2) 629(1) 3.4(0.2) 355(10) 146 2-Methyl-1-butanol C5 H12 O 402.1(0.4) 575.4(0.5) 3.9(0.1) 342(8) 254 2-Methyl-2-butanol C5 H12 O 375.6 544(1) 3.71(0.05) 326(9) 147, 254 3-Methyl-1-butanol C5 H12 O 403.9(0.3) 579(2) 3.9(0.3) 335(7) 21, 91, 222, 254, 511, 520 3-Methyl-2-butanol C5 H12 O 386.8(0.4) 556.1(0.5) 3.9(0.4) 336(9) 254 3-Methyl-2-butanone C5 H10 O 367.3(0.2) 553.1(0.3) 3.83(0.1) 321(33) 157, 166 2-Methyl-2-butene C5 H10 311.6(0.4) 470(1) 3.4(0.1) 299(7) 521 3-Methyl-1-butene C5 H10 293.2(0.2) 452.7(0.5) 3.51(0.04) 305(8) 490 Methyl tert-butyl ether C5 H12 O 328.2(0.1) 497.0(0.6) 3.41(0.05) 335(10) 25, 440 Methylcyclohexane C7 H14 374.0(0.1) 572.3(0.2) 3.48(0.09) 368(3) 34, 74, 78, 86, 88, 171, 235, 236 Methylcyclopentane C6 H12 344.9(0.2) 532.78(0.05) 3.79(0.05) 322(2) 78, 235, 236 2-Methylcyclopentanone C6 H10 O 413(3) 631(2) 4.0(0.6) 328(17) 162 2-Methyl-N,N-dimethylaniline C9 H13 N 458(2) 668.0(0.7) 3.12(0.08) 466(15) 39, 40 Methyl dodecanoate C13 H26 O2 540(2) 712(5) 1.4(0.4) 842(9) 218 1,1’-Methylenebis[(1-methylethyl)benzene] C19 H24 592(36) 795(8) 1.6(0.1) 871(30) 394 Methyl formate C2 H4 O2 304.8(0.3) 487.16(0.1) 6.01(0.01) 172(6) 19, 412, 413 2-Methylfuran C5 H6 O 337.0(0.2) 528(3) 4.77(0.08) 252(3) 290 2-Methylheptane C8 H18 390.8(0.9) 559.6(0.1) 2.50(0.02) 487(12) 86, 346, 522 3-Methylheptane C8 H18 392.0(0.6) 563.7(0.4) 2.54(0.02) 463(12) 346 4-Methylheptane C8 H18 390.8(0.5) 561.7(0.4) 2.54(0.02) 480(14) 346 Methyl heptanoate C8 H16 O2 442.8(0.4) 628(2) 2.6(0.4) 521(8) 162 4-Methyl-3-heptanol C8 H18 O 430(2) 623.5(0.7) 2.8(0.4) 505(13) 437 5-Methyl-3-heptanol C8 H18 O 427(2) 621.2(0.3) 2.8(0.3) 493(13) 437 2-Methyl-3-heptanone C8 H16 O 431 615(1) 2.7(0.3) 487(11) 162 5-Methyl-3-heptanone C8 H16 O 432(4) 619(4) 2.7(0.7) 484(11) 162 2-Methyl-1-heptene C8 H16 392(2) 567.5(0.9) 2.6(0.2) 466(10) 170 2-Methyl-2-heptene C8 H16 395(2) 569(1) 2.6(0.4) 465(11) 170 2-Methylhexane C7 H16 363.1(0.8) 530.4(0.1) 2.73(0.03) 420(15) 86, 346, 349, 522 3-Methylhexane C7 H16 365.0(0.1) 535.4(0.5) 2.82(0.06) 405(19) 346, 349 2-Methyl-3-hexanone C7 H14 O 407(3) 593(1) 2.9(0.4) 428(13) 162 5-Methyl-2-hexanone C7 H14 O 412(2) 604(1) 2.9(0.3) 434(13) 162 2-Methyl-1-hexene C7 H14 365(2) 542(1) 2.9(0.3) 407(8) 170 5-Methyl-1-hexene C7 H14 358(1) 528.7(0.4) 2.9(0.2) 410(9) 170 N-Methylhexylamine C7 H17 N 418(8) 592(1) 2.8(0.8) 458(20) 170 Methyl isobutanoate C5 H10 O2 365(1) 540.7(0.5) 3.43(0.01) 341(42) 19, 413 Methyl methacrylate C5 H8 O2 373.8(0.2) 540.3(0.6) 2.97(0.06) 320(6) 51 1-Methylnaphthalene C11 H10 517.5(0.9) 771(5) 3.56(0.07) 479(22) 86, 218, 523 2-Methylnaphthalene C11 H10 514.2(0.3) 761(3) 3.37(0.06) 464(20) 218 2-Methyloctane C9 H20 416(1) 582.8(0.2) 2.30(0.02) 547(17) 345, 522 Methyloxirane C3 H6 O 308 488.11(0.08) 5.44(0.02) 197(42) 290, 524 6-68 Critical Constants of Organic Compounds Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. Methyl pentafluoroethyl ether C3 H3 F5 O 278.8(0.9) 406.81(0.05) 2.89(0.01) 301(5) 176, 448, 525 2-Methylpentane C6 H14 333.36(0.09) 497.9(0.2) 3.03(0.01) 371(2) 86, 127, 252, 325–328, 487, 522 3-Methylpentane C6 H14 336.4(0.5) 504.6(0.2) 3.12(0.01) 368.7(0.3) 252, 324–328, 526 Methyl pentanoate C6 H12 O2 400.51(0.06) 588.9(0.3) 3.20(0.05) 398(6) 164, 165 2-Methyl-1-pentanol C6 H14 O 430(6) 604.4(0.5) 3.4(0.2) 410(8) 254 2-Methyl-2-pentanol C6 H14 O 394(1) 559.5(0.7) 3.6(0.4) 410(11) 437 2-Methyl-3-pentanol C6 H14 O 401.0(0.2) 576(1) 3.5(0.1) 380(9) 254 3-Methyl-3-pentanol C6 H14 O 402(4) 575.6(0.6) 3.5(0.2) 376(10) 254 4-Methyl-1-pentanol C6 H14 O 424(2) 603.5(0.7) 3.4(0.4) 406(7) 437 4-Methyl-2-pentanol C6 H14 O 405.1(0.5) 574.4(0.5) 4(2) 389(9) 437 4-Methyl-2-pentanone C6 H12 O 388.8(0.2) 575.4(1) 3.4(0.1) 378(12) 166, 527 2-Methyl-2-pentene C6 H12 340.4(0.5) 509.3(0.5) 3.26(0.01) 348(7) 170 4-Methyl-1-pentene C6 H12 327(2) 493.1(0.5) 3.18(0.07) 348(77) 170, 497 4-Methyl-cis-2-pentene C6 H12 329.5(0.1) 496.3(0.7) 3.24(0.01) 350(7) 170 Methyl pentyl ether C6 H14 O 372(3) 546.5(0.2) 3.04(0.1) 395(14) 173, 174 2-Methyl-1,3-propanediol C4 H10 O2 494(4) 708(2) 5.4(0.4) 300(12) 55 Methyl propanoate C4 H8 O2 351.8(0.2) 530.57(0.1) 4.0(0.2) 280(98) 19, 412, 413, 415 2-Methylpropanoic acid C4 H8 O2 427.5(0.2) 605(2) 3.7(0.3) 296(10) 146 2-Methyl-1-propanol C4 H10 O 380.99(0.07) 548(2) 4.30(0.04) 274(17) 25, 91, 148, 153, 155 2-Methyl-2-propanol C4 H10 O 355.4(0.1) 506.2(0.1) 3.98(0.07) 283(4) 153 Methyl propyl ether C4 H10 O 312(1) 476.2(0.2) 3.80(0.01) 281(7) 25 2-Methylpyridine C6 H7 N 402.5(0.2) 622(1) 4.62(0.04) 306(119) 75, 528 3-Methylpyridine C6 H7 N 417.2(0.1) 644.8(0.6) 4.63(0.03) 302(30) 90, 528 4-Methylpyridine C6 H7 N 418.4(0.1) 645.8(0.5) 4.68(0.04) 316(67) 75, 90 N-Methyl-2-pyrrolidinone C5 H9 NO 477.3(0.3) 721.7(0.4) 4.5(0.4) 330(12) 144, 242 2-Methylquinoline C10 H9 N 520.5(0.4) 778(2) 3.91(0.02) 447(49) 530 8-Methylquinoline C10 H9 N 520.5(0.7) 787(2) 4.22(0.02) 426(124) 530 Methyl salicylate C8 H8 O3 495.8(0.5) 709(30) 4.4(0.7) 436(17) 302 2-Methyltetrahydrofuran C5 H10 O 353(1) 537(2) 3.74(0.06) 292(4) 290 (Methylthio)benzene C7 H8 S 467.4(0.2) 706(4) 4.1(0.1) 374(13) 99 Methyl trifluoromethyl ether C2 H3 F3 O 247.9(0.7) 377.92(0.06) 3.64(0.03) 219(2) 447, 525 Methyltris(trimethylsiloxy)silane C10 H30 O3 Si4 464.3(0.2) 597.4(0.2) 1.23(0.02) 1089(74) 34 4-Morpholinecarboxaldehyde C5 H9 NO2 511(1) 779(4) 5.0(0.4) 326(14) 54 Naphthalene C10 H8 491.1(0.1) 748.3(0.4) 4.06(0.04) 408(21) 79, 82, 86, 241, 251, 355, 451, 531 Neopentane C5 H12 282.65(0.06) 433.71(0.01) 3.20(0.01) 311.6(0.7) 532 Nitromethane CH3 NO2 374.3(0.1) 588(3) 6.0(0.2) 175(2) 533, 534 Nonadecane C19 H40 603(3) 756(5) 1.16(0.07) 1216(43) 358, 359 1-Nonadecene C19 H38 604(17) 755(8) 1.2(0.2) 1196(36) 365 1,1,1,2,2,3,3,4,4-Nonafluorohexan-5-one C6 H3 F9 O 360.47 498.97(0.08) 2.20(0.02) 504(2) 308 Nonanal C9 H18 O 468(3) 658(2) 2.7(0.1) 546(10) 242 Nonane C9 H20 424.0(0.2) 594.2(0.5) 2.29(0.05) 547(23) 34, 36, 78, 86, 131, 243–245, 247, 249, 251, 454, 456, 535, 536 1,9-Nonanediamine C9 H22 N2 531.8 726(7) 2.6(0.3) 600(23) 140 Nonanedioic acid C9 H16 O4 630.2 844(13) 2.7(0.2) 586(17) 253 Nonanoic acid C9 H18 O2 529(1) 712(3) 2.3(0.8) 592(16) 146 1-Nonanol C9 H20 O 486.8(0.4) 670.6(0.5) 2.54(0.07) 555(75) 149, 152, 254, 255 2-Nonanol C9 H20 O 466.7 649(1) 2.53(0.1) 575(11) 149, 255 3-Nonanol C9 H20 O 468 648.0(0.3) 2.5(0.3) 577(12) 255 4-Nonanol C9 H20 O 465.7 645.1(0.3) 2.5(0.3) 577(12) 255 2-Nonanone C9 H18 O 467(1) 652.1(0.7) 2.5(0.1) 560(8) 49, 466 3-Nonanone C9 H18 O 460(4) 648(4) 2.4(0.6) 560(7) 466 4-Nonanone C9 H18 O 461(4) 643.7(0.3) 2.4(0.3) 560(7) 466 5-Nonanone C9 H18 O 461.5(0.3) 641.4(0.3) 2.35(0.02) 560(7) 466 1-Nonene C9 H18 420.0(0.6) 594(1) 2.38(0.01) 529(2) 257 Octacosane C28 H58 705(6) 824(8) 0.8(0.1) 1916(65) 358 Octadecane C18 H38 589(2) 748(1) 1.3(0.1) 1167(41) 244 1-Octadecanol C18 H38 O 624(2) 790(8) 1.28(0.1) 1157(18) 361 1-Octadecene C18 H36 588.7(1) 748(8) 1.3(0.1) 1119(34) 365 Critical Constants of Organic Compounds 6-69 Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 1,1,1,2,2,3,3,4-Octafluorobutane C4 H2 F8 300.62(0.02) 432.0(0.1) 2.80(0.02) 360(22) 537 1,2,2,3,3,4,4,5-Octafluoro-1-pentanol C5 H4 F8 O 413.1(0.3) 571(1) 2.9(0.1) 440(24) 362 Octafluorotetrahydrofuran C4 F8 O 272.3(0.5) 399.6(0.7) 2.68(0.09) 350(30) 450 Octamethylcyclotetrasiloxane C8 H24 O4 Si4 448.5(0.9) 585.8(0.9) 1.33(0.01) 1006(67) 114, 538 Octamethyltrisiloxane C8 H24 O2 Si3 425.6(0.8) 564.1(0.2) 1.42(0.01) 882(16) 539 Octanal C8 H16 O 447(3) 639.3(0.3) 3.0(0.3) 489(7) 163, 242 Octane C8 H18 398.8(0.1) 568.7(0.1) 2.48(0.01) 490(22) 11, 19, 33, 34, 36, 78, 83, 86, 91, 96, 131, 133, 134, 243–245, 247, 249, 318, 319, 324, 346, 465, 469, 535, 540, 541 1,8-Octanediamine C8 H20 N2 498.7 712(7) 2.8(0.3) 547(20) 140 Octanedioic acid C8 H14 O4 618.6 843(13) 3.0(0.2) 520(16) 253 Octanenitrile C8 H15 N 475(3) 674.4(0.4) 2.85(0.03) 494(10) 35 Octanoic acid C8 H16 O2 513(1) 694(1) 2.9(0.3) 522(19) 145, 146, 360, 464 1-Octanol C8 H18 O 467.8(0.8) 651(2) 2.80(0.07) 490(47) 25, 149, 152, 254, 255 2-Octanol C8 H18 O 452.5 629.5(0.9) 2.75(0.04) 519(10) 149, 254, 255 3-Octanol C8 H18 O 457(6) 628.4(0.3) 2.8(0.4) 515(10) 255 4-Octanol C8 H18 O 449.5 625.1(0.3) 2.8(0.3) 516(10) 255 2-Octanone C8 H16 O 446(3) 632.7(0.2) 2.7(0.5) 497(6) 466 3-Octanone C8 H16 O 439(4) 627.7(0.2) 2.7(0.3) 497(6) 466 4-Octanone C8 H16 O 439(3) 623.8(0.2) 2.7(0.3) 497(6) 466 1-Octene C8 H16 398.0(0.5) 566.58(0.05) 2.68(0.02) 464(2) 86, 257 trans-2-Octene C8 H16 395.5(0.5) 569.8(0.4) 2.58(0.09) 471(9) 170 trans-4-Octene C8 H16 394.4(0.2) 566(1) 2.55(0.06) 472(9) 170 Octylamine C8 H19 N 451.8(0.2) 641(1) 2.82(0.03) 494(41) 542 Octylbenzene C14 H22 536(2) 725(7) 2.0(0.2) 746(17) 258 Octyl orthosilicate C32 H68 O4 Si 812(16) 57 Oxazole C3 H3 NO 342.6(0.2) 551(4) 6.8(0.2) 185(23) 54 Oxirane C2 H4 O 283.5(0.1) 469(1) 7.2(0.2) 138(4) 543, 544 Paraldehyde C6 H12 O3 397(2) 563(10) 4(3) 410(15) 12 Pentacene C22 H14 1115(47) 806(23) 545 1H-Pentadecafluoroheptane C7 HF15 368(2) 495.8(0.7) 1.7(0.5) 644(38) 546 Pentadecane C15 H32 543.8(0.4) 707(2) 1.54(0.09) 938(36) 243, 244, 245, 247, 249, 363, 547 Pentadecanoic acid C15 H30 O2 612(4) 777(8) 1.6(0.2) 1002(22) 360 1-Pentadecanol C15 H32 O 591(2) 757(8) 1.6(0.2) 961(16) 361 1-Pentadecene C15 H30 541.5(0.4) 705(7) 1.56(0.05) 933(30) 365 Pentafluorobenzene C6 HF5 358(3) 530.93(0.03) 3.53(0.01) 322(22) 472, 548 3,3,4,4,4-Pentafluoro-2-butanone C4 H3 F5 O 314.36(0.04) 453(1) 2.90(0.06) 333(4) 110 Pentafluoroethane C2 HF5 224.65 339.2(0.2) 3.63(0.01) 210(3) 180, 309, 312, 315, 447, 448, 549–554 1,1,1,2,2-Pentafluoropentan-3-one C5 H5 F5 O 335.24 475.5(0.1) 2.64(0.01) 356(1) 308 1,1,1,2,2-Pentafluoropropane C3 H3 F5 255.1(0.3) 380.1(0.4) 3.14(0.02) 273(3) 555 1,1,1,3,3-Pentafluoropropane C3 H3 F5 288.5 427.20(0.07) 3.66(0.02) 262(14) 203 1,1,2,2,3-Pentafluoropropane C3 H3 F5 298.2 447.57(0.06) 3.96(0.02) 258(13) 203 1,1,1,2,2-Pentafluoro-3-(1,1,2,2- tetrafluoroethoxy)propane C5 H3 F9 O 343.4 473.0(0.1) 2.24(0.01) 457(2) 113 Pentafluoro(trifluoromethoxy)ethane C3 F8 O 249.5(0.3) 356.8(0.1) 2.4(0.5) 319(5) 442 Pentafluoro(trifluoromethyl)sulfur CF8 S 252.4(0.2) 381.2(0.1) 3.4(0.1) 284(4) 442 Pentanal C5 H10 O 376(2) 567(3) 3.1(0.3) 313(11) 104, 124 Pentane C5 H12 309.21(0.07) 469.7(0.1) 3.37(0.01) 310(1) 19, 34, 36, 52, 64, 77, 84–86, 127, 131, 133, 134, 201, 202, 243, 244, 254, 286, 324, 359, 394, 456, 490, 556–562 Pentanedioic acid C5 H8 O4 546(10) 840(13) 4.3(0.5) 343(13) 253 Pentanenitrile C5 H9 N 413(1) 610.3(0.2) 3.58(0.05) 320(8) 35 Pentanoic acid C5 H10 O2 459.2(0.3) 639(2) 3.6(0.1) 347(15) 11, 41, 145, 146, 464 1-Pentanol C5 H12 O 410.8(0.4) 587.9(0.4) 3.9(0.3) 331(9) 25, 34, 149, 329, 456, 465, 563 6-70 Critical Constants of Organic Compounds Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 2-Pentanol C5 H12 O 392.2(0.5) 560.4(0.2) 4.2(0.4) 340(3) 149, 254, 465 3-Pentanol C5 H12 O 396(2) 559.6(0.3) 4.9(0.9) 325(2) 465 2-Pentanone C5 H10 O 375.3(0.1) 561.0(0.2) 3.70(0.06) 324(4) 25, 172 3-Pentanone C5 H10 O 375.0(0.1) 561.4(0.2) 3.73(0.07) 319(11) 25 1-Pentene C5 H10 310.0(0.2) 464.74(0.04) 3.55(0.02) 301.0(0.1) 86, 470, 559 cis-2-Pentene C5 H10 303.1(0.3) 474.9(0.4) 3.69(0.02) 301(7) 564 Pentyl acetate C7 H14 O2 422.5(0.3) 600(2) 2.79(0.03) 466(123) 141, 162, 166 Pentylbenzene C11 H16 476(3) 675(7) 2.6(0.3) 559(12) 258 Pentyl benzoate C12 H16 O2 533(3) 736(14) 2.2(0.2) 661(14) 169 Pentyl formate C6 H12 O2 399(3) 576(4) 3.5(0.8) 453(35) 415 Perfluoroacetone C3 F6 O 245.7(0.4) 357.2(0.1) 2.85(0.01) 329(7) 197, 470 Perfluorobutane C4 F10 271.0(0.8) 386.3(0.2) 2.33(0.02) 380(18) 565, 566 Perfluorocyclobutane C4 F8 267.3 388.4(0.1) 2.78(0.01) 316(8) 265, 470, 567, 568 Perfluorocyclohexane C6 F12 325.95 s 457.1(0.5) 2.24(0.03) 424(32) 569 Perfluorocyclohexene C6 F10 324.8(0.1) 461.7(0.7) 2.6(0.1) 434(28) 546 Perfluorodecane C10 F22 408(3) 542.4(0.4) 1.45(0.03) 892(7) 240, 570 Perfluorodimethoxymethane C3 F8 O2 263.1(0.7) 372.4(0.2) 2.34(0.01) 370(30) 116, 571 Perfluoro-2,3-dimethylbutane C6 F14 332.9(0.3) 463.0(0.1) 1.95(0.03) 523(18) 240, 572 Perfluoroethyl ethyl ether C4 H5 F5 O 301(3) 431.23(0.08) 2.53(0.01) 366(3) 176 Perfluoroethyl 2,2,2-trifluoroethyl ether C4 H2 F8 O 301.04 421.68(0.08) 2.33(0.01) 409(3) 176 Perfluoroheptane C7 F16 355.6(0.2) 477(3) 1.63(0.01) 603(14) 232, 566, 570, 573–576 Perfluoro-1-heptene C7 F14 354(4) 478.2(0.7) 1.7(0.3) 555(34) 546 1H-Perfluorohexane C6 HF13 345(4) 471.8(0.7) 2.0(0.3) 504(32) 546 Perfluorohexane C6 F14 330.3(0.2) 451(3) 1.88(0.02) 552(77) 198, 470, 546, 570, 572, 573, 577 Perfluoro-1-hexene C6 F12 330.2 454.3(0.7) 1.9(0.7) 462(31) 546 Perfluoroisobutane C4 F10 273 395.4(0.7) 396(22) 578 Perfluoroisopentane C5 F12 303.26(0.03) 423(19) 2.12(0.02) 465(8) 240 Perfluoroisopropyl methyl ether C4 H3 F7 O 302(1) 433.30(0.08) 2.55(0.01) 369(3) 176 Perfluoromethylcyclohexane C7 F14 349.4(0.2) 486.5(1) 2.02(0.01) 561(4) 325, 326, 327, 566, 569 Perfluoromethylcyclopentane C6 F12 321.58(0.01) 451.43(0.04) 2.17(0.01) 419(37) 579 Perfluoro-2-methylpentane C6 F14 330.8(0.3) 454.6(0.2) 1.87(0.02) 585(10) 572, 580 Perfluoro-3-methylpentane C6 F14 331(9) 450(1) 1.69(0.01) 511(36) 572 Perfluoronaphthalene C10 F8 473(8) 673(1) 2.9(0.6) 464(29) 546 Perfluorononane C9 F20 390(3) 524.0(0.1) 1.56(0.04) 846(48) 570 Perfluorooctane C8 F18 378(2) 502.3(0.1) 1.66(0.02) 738(17) 34, 240, 570, 573 Perfluorooxetane C3 F6 O 244.5(0.6) 361.8(0.5) 3.10(0.02) 274(24) 116, 571 1H-Perfluoropentane C5 HF11 319(2) 443.9(0.7) 2.2(0.3) 413(28) 546 Perfluoropentane C5 F12 302.3(0.2) 421.8(0.1) 2.04(0.02) 463(7) 570, 573 Perfluoropropane C3 F8 236.3(0.3) 345.03(0.08) 2.67(0.01) 301(12) 187, 305, 470, 581 Perfluoropropyl methyl ether C4 H3 F7 O 307(1) 437.7(0.1) 2.48(0.01) 382(3) 176 Perfluorotoluene C7 F8 377.8(0.3) 534.4(0.2) 2.70(0.02) 423(26) 25 Perfluorotributylamine C12 F27 N 451(2) 566(4) 1.24(0.09) 1196(66) 582 Perfluorovaleric acid C5 HF9 O2 415.3(0.3) 545.5(0.2) 2.10(0.05) 496(29) 583 Phenol C6 H6 O 455.0(0.1) 694.3(0.1) 5.5(0.2) 283(10) 218, 584 Phenyl acetate C8 H8 O2 468(1) 686(2) 3.60(0.06) 407(12) 55 4-Phenyl-1-butanol C10 H14 O 537(3) 746(14) 3.1(0.2) 493(19) 584 Phenyl isocyanate C7 H5 NO 439.4(0.4) 657(10) 3.6(0.1) 342(15) 54 3-Phenyl-1-propanol C9 H12 O 514(4) 732(14) 3.4(0.5) 450(14) 584 (1S)-(-)-α-Pinene C10 H16 429.1(0.4) 644(2) 3.4(0.2) 472(10) 496 Piperazine C4 H10 N2 421.78(0.05) 660(5) 5.4(0.4) 283(16) 331, 489 Piperidine C5 H11 N 379.34(0.09) 594.14(0.02) 4.7(0.1) 294(10) 39, 218 Propanal C3 H6 O 321.1(0.2) 503.7(0.8) 5.04(0.03) 218(9) 104, 124, 163, 242 Propane C3 H8 231.04(0.09) 369.9(0.1) 4.25(0.01) 199(6) 29, 125, 127, 131–134, 252, 322, 323, 336, 371, 387, 470, 486, 509, 540, 585–596 1,3-Propanediamine C3 H10 N2 412.3(0.7) 632(7) 5.7(0.6) 257(13) 140 1,2-Propanediol C3 H8 O2 460.4(0.2) 676(1) 5.9(0.2) 237(10) 32 1,3-Propanediol C3 H8 O2 487.8(0.3) 718(2) 6.7(0.2) 255(12) 55 Critical Constants of Organic Compounds 6-71 Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. Propanenitrile C3 H5 N 370.4(0.4) 561.3(0.2) 4.26(0.07) 211(7) 35 1-Propanethiol C3 H8 S 340.8(0.1) 536.6(0.6) 4.7(0.1) 286(11) 143, 144 Propanoic acid C3 H6 O2 414.6(0.2) 603(3) 4.5(0.7) 232(12) 39, 145, 146, 493, 597, 598 1-Propanol C3 H8 O 370.19(0.09) 536.8(0.2) 5.1(0.1) 220(22) 19, 34, 80, 148–150, 152, 153, 599, 600 2-Propanol C3 H8 O 355.36(0.09) 508.3(0.2) 4.7(0.1) 226(1) 25, 91, 148, 149, 153, 324, 440, 520, 601, 602 Propene C3 H6 225.5(0.1) 364.9(0.5) 4.59(0.02) 184(11) 67, 123, 172, 181, 427, 603–610 2-Propoxyethanol C5 H12 O2 425(3) 614.7(0.7) 3.65(0.09) 364(13) 11, 41 1-Propoxy-2-propanol C6 H14 O2 423.3(0.7) 605(1) 3.1(0.1) 417(16) 32 Propyl acetate C5 H10 O2 374.1(0.2) 549.69(0.08) 3.37(0.07) 346(24) 19, 411, 413, 415 Propylamine C3 H9 N 320.36(0.08) 499.2(0.4) 4.77(0.06) 230(12) 170, 193 Propylbenzene C9 H12 432.3(0.5) 638.3(0.1) 3.20(0.02) 441(6) 79, 86, 88 Propyl benzoate C10 H12 O2 504(2) 710(14) 2.6(0.3) 530(10) 169 Propyl butanoate C7 H14 O2 417(2) 593(1) 2.72(0.06) 463(10) 162, 166 Propylcyclohexane C9 H18 429.8(0.3) 630.8(0.9) 2.87(0.04) 489(13) 170, 171 Propylene carbonate C4 H6 O3 514.8(0.7) 763(2) 4.1(0.2) 256.5(0.1) 55 1,2-Propylene glycol 1-tert-butyl ether C7 H16 O2 425.2 601(4) 2.7(0.1) 468(15) 99 1,2-Propylene glycol monomethyl ether acetate C6 H12 O3 419.1(0.4) 598(1) 3.1(0.2) 432(16) 41, 144 Propyl formate C4 H8 O2 353.8(0.2) 538.1(0.1) 4.07(0.02) 281(31) 19, 412, 413, 415 Propyl isobutanoate C7 H14 O2 407(4) 582(11) 3(1) 463(9) 162, 167 Propyl 3-methylbutanoate C8 H16 O2 428(3) 609(6) 2.5(0.8) 523(9) 147 Propyl propanoate C6 H12 O2 395.3(0.1) 569(3) 3.1(0.1) 403(6) 162, 166 Propyne C3 H4 250 402(2) 5.63(0.06) 160(10) 605, 611 Pyrazine C4 H4 N2 389.4(0.1) 627(1) 6.49(0.03) 225(16) 612 Pyridine C5 H5 N 388.3(0.1) 619(2) 5.63(0.07) 248(12) 16, 17, 60, 90, 246, 290, 520, 613 Pyrrole C4 H5 N 402.89(0.04) 639.7(0.2) 8.0(0.2) 222(15) 241 Pyrrolidine C4 H9 N 359.8(0.1) 568.6(0.2) 5.69(0.08) 259(3) 241, 290 Quinoline C9 H7 N 510.2(0.5) 782(3) 4.75(0.1) 382(17) 218 Resorcinol C6 H6 O2 553(2) 836(10) 6.3(0.3) 292(10) 489 Stearic acid C18 H36 O2 644(3) 803(8) 1.3(0.2) 1251(27) 360 Styrene C8 H8 418.4(0.6) 635(2) 3.9(0.2) 357(15) 481 Succinic acid C4 H6 O4 507(3) 851(20) 308(21) 253 m-Terphenyl C18 H14 648(1) 883(7) 2.2(0.2) 747(37) 108, 358 o-Terphenyl C18 H14 610(5) 857(6) 2.9(0.1) 737(37) 108 p-Terphenyl C18 H14 649 913(22) 2.5(0.5) 713(37) 108, 614 Tetrabutyl silicate C16 H36 O4 Si 682(14) 57 Tetrachloromethane CCl4 349.8(0.2) 556.5(0.3) 4.57(0.07) 276(9) 19, 27, 469, 615–619 Tetracosane C24 H50 664(5) 800(5) 0.9(0.1) 1585(55) 358, 359 Tetradecamethylcycloheptasiloxane C14 H42 O7 Si7 548.4(0.2) 683.2(0.2) 0.99(0.02) 1634(110) 34 Tetradecane C14 H30 526.6(0.4) 693(1) 1.56(0.08) 870(49) 34, 244 Tetradecanedioic acid C14 H26 O4 639(10) 1.9(0.2) 253 Tetradecanoic acid C14 H28 O2 599(1) 763(8) 1.6(0.2) 921(20) 360 1-Tetradecanol C14 H30 O 569.0(0.4) 743(7) 1.70(0.04) 887(15) 361 2-Tetradecanone C14 H28 O 562(6) 728(9) 1.6(0.5) 896(26) 256 3-Tetradecanone C14 H28 O 552(7) 727(6) 1.6(0.5) 896(26) 256 4-Tetradecanone C14 H28 O 552(7) 725(6) 1.6(0.5) 900(27) 256 7-Tetradecanone C14 H28 O 552(8) 723(8) 1.6(0.6) 904(27) 256 1-Tetradecene C14 H28 524.2(0.4) 691(7) 1.58(0.07) 851(24) 365 Tetradecyl orthosilicate C40 H84 O4 Si 849(16) 57 Tetraethoxysilane C8 H20 O4 Si 441(1) 587(12) 2.0(0.4) 701.3(0.2) 57 Tetraethylene glycol C8 H18 O5 588(7) 800(30) 2.8(0.7) 608(31) 283 Tetraethylsilane C8 H20 Si 426.5(0.7) 606(2) 2.297(0.01) 596.4(0.2) 620 1,2,3,4-Tetrafluorobenzene C6 H2 F4 367.4(0.8) 550.8(0.2) 3.791(0.01) 312(22) 25 1,2,3,5-Tetrafluorobenzene C6 H2 F4 357.4(0.8) 535.2(0.2) 3.75(0.01) 311(22) 25 1,2,4,5-Tetrafluorobenzene C6 H2 F4 363.3(0.3) 543.3(0.2) 3.80(0.01) 309(22) 25 1,1,2,2-Tetrafluoro-2-(2,2-difluoromethoxy) ethane C4 H4 F6 O 352.13 501.08(0.08) 3.09(0.02) 356(1) 113 6-72 Critical Constants of Organic Compounds Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 1,1,1,2-Tetrafluoroethane C2 H2 F4 247.0(0.1) 374.2(0.2) 4.06(0.01) 200(2) 113, 182, 183, 188, 278–280, 305, 313, 315, 447, 448, 478, 621–631 1,1,2,2-Tetrafluoroethane C2 H2 F4 253(1) 391.75(0.08) 4.61(0.01) 192(1) 178, 632 Tetrafluoroethene C2 F4 197(1) 307(1) 3.94(0.05) 183(3) 633, 634 1,2,2,2-Tetrafluoroethyl difluoromethyl ether C3 H2 F6 O 296(2) 428.95(0.08) 3.05(0.01) 315(2) 176 1,1,2,2-Tetrafluoroethyl 1,1,1-trifluoroethyl ether C4 H3 F7 O 329.37 463.89(0.07) 2.71(0.01) 373(1) 113 Tetrafluoromethane CF4 145.2(0.1) 227.54(0.03) 3.73(0.03) 140(1) 506, 635 1,1,2,2-Tetrafluoro-3-methoxypropane C4 H6 F4 O 347.4(0.1) 505.4(0.1) 3.28(0.01) 331(1) 113 1,2,2,3-Tetrafluoro-1-propanol C3 H4 F4 O 386.4(0.4) 554(2) 3.3(0.2) 280(15) 362 1,1,2,2-Tetrafluoro-3-(1,1,2,2-tetrafluoroethoxy) propane C5 H4 F8 O 366.32 510.07(0.08) 2.58(0.01) 440(2) 113 1,1,1,2-Tetrafluoro-2-(trifluoromethoxy)ethane C3 HF7 O 264(2) 377.26(0.06) 2.62(0.01) 321(2) 525 3,4,4,4-Tetrafluoro-3-(trifluoromethyl)-2- butanone C5 H3 F7 O 328.76(0.05) 468(1) 2.50(0.06) 409(5) 110 4,4,5,5-Tetrafluoro-2-(trifluoromethyl)-1,3- dioxolane C4 HF7 O2 304.6(0.1) 435(1) 2.62(0.07) 376(4) 110 Tetrahexoxysilane C24 H52 O4 Si 757(16) 57 Tetrahydrofuran C4 H8 O 339.1(0.1) 540(1) 5.29(0.06) 223(2) 23, 241, 290 1,2,3,4-Tetrahydronaphthalene C10 H12 480.3(0.3) 720(1) 3.6(0.1) 431(40) 144, 242, 636 Tetrahydropyran C5 H10 O 361.1(0.4) 572.0(0.3) 4.8(0.2) 278(18) 75 Tetrahydrothiophene C4 H8 S 394.2(0.2) 632.0(0.2) 5.4(0.6) 276(19) 143, 241 1,2,4,5-Tetraisopropylbenzene C18 H30 532 703(1) 1.65(0.02) 983(83) 317 Tetramethoxysilane C4 H12 O4 Si 393.2(0.7) 558(12) 2.8(0.6) 464(22) 57 1,2,4,5-Tetramethylbenzene C10 H14 470(1) 676(2) 2.9(0.3) 489(11) 39 2,2,3,3-Tetramethylhexane C10 H22 433(2) 623.0(0.5) 2.51(0.06) 574(14) 536 2,2,5,5-Tetramethylhexane C10 H22 410(2) 581.4(0.5) 2.19(0.01) 600(14) 536 2,2,3,3-Tetramethylpentane C9 H20 413.3(0.4) 607.5(0.5) 2.74(0.03) 514(15) 536 2,2,3,4-Tetramethylpentane C9 H20 406.1(0.8) 592.6(0.5) 2.60(0.03) 517(17) 536 2,2,4,4-Tetramethylpentane C9 H20 395(1) 574.6(0.5) 2.49(0.01) 532(16) 536 2,3,3,4-Tetramethylpentane C9 H20 414.6(0.7) 607.5(0.5) 2.72(0.04) 517(17) 536 Tetramethylsilane C4 H12 Si 299.8(0.5) 449(2) 2.82(0.01) 362(7) 637–639 Tetramethylstannane C4 H12 Sn 350(1) 521.77(0.02) 2.98(0.01) 109(109) 640, 641 Tetranonoxysilane C36 H76 O4 Si 830(16) 57 Tetrapropyl silicate C12 H28 O4 Si 649(12) 57 Thiacyclohexane C5 H10 S 414.88(0.04) 684(44) 6.50(0.07) 284(11) 104 Thiobis(trifluoromethane) C2 F6 S 251.3(0.3) 376.8(0.1) 3.2(0.5) 216(19) 442 Thiophene C4 H4 S 357.2(0.1) 579.4(0.2) 5.7(0.2) 230(3) 241, 290 Thymol C10 H14 O 506(3) 698(10) 3(2) 528(21) 302 Toluene C7 H8 383.75(0.07) 591.9(0.2) 4.13(0.02) 314(7) 34, 63, 68, 74, 78, 79, 84, 86, 88, 90, 96, 163, 172, 258, 481, 636, 642–646 Triacontane C30 H62 724(7) 843(8) 0.6(0.1) 2055(69) 358 Tribromomethane CHBr3 422.3(0.5) 682(1) 5.8(0.2) 261(12) 647 Trichloroacetyl chloride C2 Cl4 O 391.3(0.3) 604(2) 4.21(0.03) 331(54) 410 Trichloroethylsilane C2 H5 Cl3 Si 371.8(0.7) 559.9(0.6) 3.34(0.04) 403(5) 266 Trichlorofluoromethane CCl3 F 296.8(0.6) 471.1(0.2) 4.40(0.03) 248.0(0.9) 33, 34, 191, 271, 571 Trichloromethane CHCl3 334.3(0.1) 536.0(0.4) 5.5(0.2) 237(7) 18, 27, 28, 117 Trichloromethylsilane CH3 Cl3 Si 339(2) 517.7(0.3) 3.52(0.03) 329(9) 264, 648 1,3,5-Trichloro-2,4,6-trifluorobenzene C6 Cl3 F3 472(27) 684.7(0.4) 3.3(0.1) 443(27) 25 1,1,2-Trichloro-1,2,2-trifluoroethane C2 Cl3 F3 320.8(0.2) 487.4(0.2) 3.40(0.02) 325(1) 191, 265, 271, 649 Tricosane C23 H48 654(9) 790(8) 0.9(0.1) 1527(53) 359 Tridecane C13 H28 508.5(0.4) 676(1) 1.68(0.04) 824(30) 34, 244, 249 1-Tridecanol C13 H28 O 560(8) 732(7) 1.8(0.2) 828(14) 361 2-Tridecanone C13 H26 O 541(1) 717(6) 1.8(0.2) 820(24) 256 3-Tridecanone C13 H26 O 539(7) 716(5) 1.7(0.5) 823(24) 256 4-Tridecanone C13 H26 O 539(7) 712(6) 1.7(0.5) 823(24) 256 5-Tridecanone C13 H26 O 539(8) 710(8) 1.7(0.7) 826(17) 256 6-Tridecanone C13 H26 O 539(7) 709(5) 1.7(0.5) 826(24) 256 7-Tridecanone C13 H26 O 539(9) 708(5) 1.7(0.5) 830(24) 256 Critical Constants of Organic Compounds 6-73 Name Mol. Form. Tb /K Tc /K Pc /MPa Vc /cm3 mol–1 Ref. 1-Tridecene C13 H26 506.0(0.7) 673(7) 1.74(0.05) 770(17) 365 Tridecylbenzene C19 H32 613(4) 790(8) 1.5(0.1) 1079(43) 258 Triethylamine C6 H15 N 361.9(0.2) 535.6(0.3) 3.1(0.3) 392(25) 117, 286 1,3,5-Triethylbenzene C12 H18 489.0(0.9) 679(2) 2.32(0.01) 624(60) 332 Triethylene glycol C6 H14 O4 561.8(0.2) 775(30) 3.3(0.2) 454(25) 283 Trifluoroacetonitrile C2 F3 N 204.3(0.8) 311.1(0.4) 3.61(0.04) 202(4) 470 1,2,3-Trifluorobenzene C6 H3 F3 368 560.3(0.4) 4.1(0.4) 296(20) 119 1,2,4-Trifluorobenzene C6 H3 F3 363 551.1(0.4) 4.1(0.6) 297(20) 119 1,3,5-Trifluorobenzene C6 H3 F3 350.1(0.5) 530.9(0.4) 3.8(0.2) 300(20) 119 1,1,1-Trifluoroethane C2 H3 F3 225.9(0.1) 345.89(0.07) 3.77(0.01) 195(15) 179, 203, 309, 478, 479, 549, 624, 650–653 2,2,2-Trifluoroethanol C2 H3 F3 O 346.9(0.3) 498.57(0.05) 4.81(0.01) 211(12) 654, 655 2,2,2-Trifluoroethyl methyl ether C3 H5 F3 O 304.77 448.98(0.08) 3.51(0.06) 277(3) 176 Trifluoroiodomethane CF3 I 251.3(0.6) 396.44(0.06) 3.95(0.01) 231(3) 656–659 Trifluoromethane CHF3 191.1(0.1) 299.00(0.02) 4.82(0.01) 133(1) 310, 606, 660–664 Trifluoromethyl difluoromethyl ether C2 HF5 O 238.1(0.2) 354.49(0.06) 3.36(0.02) 226(20) 203 Trifluoromethyl 1,1,2,2-tetrafluoroethyl ether C3 HF7 O 270(1) 387.8(0.5) 2.65(0.01) 341(22) 116, 571 3,3,3-Trifluoropropene C3 H3 F3 246(4) 378.6(0.5) 3.61(0.08) 229(14) 440 Trimethylamine C3 H9 N 275.9(0.2) 433.0(0.6) 4.08(0.04) 254(6) 322, 323, 665 1,2,3-Trimethylbenzene C9 H12 449.1(0.4) 664.4(0.1) 3.45(0.03) 423(11) 79 1,2,4-Trimethylbenzene C9 H12 442.5(0.3) 649.1(0.1) 3.3(0.1) 436(12) 79, 86, 96, 251 1,3,5-Trimethylbenzene C9 H12 437.8(0.3) 637.31(0.1) 3.13(0.05) 435(12) 79 3,7,7-Trimethyl-bicyclo[4.1.0]hept-3-ene C10 H16 445(2) 658(2) 2.9(0.5) 487(10) 496 2,2,3-Trimethylbutane C7 H16 353.9(0.1) 531.3(0.5) 2.96(0.03) 401(13) 346, 349 Trimethylchlorosilane C3 H9 ClSi 330.8(0.4) 497.7(0.6) 3.20(0.03) 366(6) 266 1α,3α,5β-1,3,5-Trimethylcyclohexane C9 H18 414(2) 602(2) 2.6(0.3) 494(14) 74 3,3,5-Trimethylheptane C10 H22 430(3) 609.5(0.5) 2.32(0.05) 583(18) 536 2,2,5-Trimethylhexane C9 H20 397(2) 570(2) 2.46(0.03) 547(18) 350 2,2,3-Trimethylpentane C8 H18 382.9(0.4) 563.5(0.4) 2.73(0.02) 442(16) 346 2,2,4-Trimethylpentane C8 H18 372.3(0.2) 543.9(0.4) 2.57(0.02) 475(20) 33, 34, 86, 159, 346, 666, 667 2,3,3-Trimethylpentane C8 H18 387.8(0.3) 573.5(0.4) 2.82(0.03) 454(14) 346 2,3,4-Trimethylpentane C8 H18 386.5(0.3) 566.4(0.4) 2.72(0.02) 462(12) 346 cis-Tri(methylphenyl)trisiloxane C21 H24 O3 Si3 824(8) 353 trans-2,4,6-Trimethyl-2,4,6- triphenylcyclotrisiloxane C21 H24 O3 Si3 839(8) 353 Undecafluorocyclohexane C6 HF11 335.2 477.7(0.7) 546 Undecane C11 H24 469.0(0.3) 638.8(0.2) 2.01(0.03) 683(20) 34, 86, 131, 243, 249, 363, 535 Undecanoic acid C11 H22 O2 553 728(7) 2.1(0.2) 741(20) 360 1-Undecanol C11 H24 O 519(2) 703.0(0.6) 2.15(0.07) 707(12) 149 2-Undecanone C11 H22 O 506.2(0.3) 688(2) 2.08(0.01) 692(20) 256 3-Undecanone C11 H22 O 500 685(2) 2.0(0.4) 692(20) 256 4-Undecanone C11 H22 O 501(3) 681(2) 2.0(0.2) 692(20) 256 5-Undecanone C11 H22 O 500 679(2) 2.0(0.2) 692(20) 256 6-Undecanone C11 H22 O 500.5(0.5) 678(2) 2.02(0.01) 692(20) 256 Undecylbenzene C17 H28 585(3) 763(8) 1.6(0.1) 946(35) 258 Vinyl acetate C4 H6 O2 345.8(0.3) 519.2(0.2) 4.17(0.03) 269(7) 156, 440 m-Xylene C8 H10 412.2(0.4) 616.9(0.3) 3.54(0.01) 377(7) 34, 68, 79, 88, 90, 106, 668 o-Xylene C8 H10 417.5(0.4) 630.26(0.1) 3.74(0.01) 372(40) 34, 68, 78, 79, 88, 669 p-Xylene C8 H10 411.4(0.5) 616.17(0.09) 3.55(0.02) 372(35) 34, 68, 74, 79, 88, 90, 669 2,3-Xylenol C8 H10 O 490.03(0.05) 723(1) 4.1(0.3) 397(15) 218 2,4-Xylenol C8 H10 O 484.09(0.03) 708(1) 3.5(0.3) 389(15) 218 2,5-Xylenol C8 H10 O 484.29(0.08) 707(1) 3.9(0.1) 397(15) 25 2,6-Xylenol C8 H10 O 474.18(0.05) 701(1) 3.8(0.1) 396(15) 218 3,4-Xylenol C8 H10 O 500.46(0.05) 730(1) 4.9(0.5) 388(15) 218 3,5-Xylenol C8 H10 O 494.86(0.05) 716(1) 3.8(0.2) 396(15) 218 6-74 Critical Constants of Organic Compounds References 1. 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