2 0 unspecified Original Blahut, A.[Ales] Prokopova, O.[Olga] Vins, Vaclav Stejfa, Vojtech Soba, Lukas Thol, Monika Span, Roland Int. J. Thermophys. 2025 2025-11-14 Density, heat capacity and vapor pressure of squalane New experimental data for squalane, including liquid densities, liquid heat capacities, and saturated vapor pressures, are presented together with their respective uncertainties. Liquid densities were determined from 293.15K to 453.15K at pressures up to 20MPa using an accurate single-sinker magnetic suspension densimeter. Auxiliary measurements were performed with a vibrating tube densimeter from 273.15K to 363.15K at ambient pressure, including the correction for sample viscosity. Heat capacities were measured using two differential scanning calorimeters, covering a temperature range from 260K to 518.6 K. Vapor pressures in the range from 0.21Pa to 49Pa were acquired by the static method, spanning a temperature interval from 388K to 462 K. Correlations for density and heat capacity of liquid squalane developed within this work are discussed and compared to the literature data. A correlation for saturated vapor pressure in the form of theWagner equation, covering a wide temperature range, was obtained by simultaneously correlating vapor pressures and the relevant caloric data. The choice of exponents used in the Wagner equation is discussed. 0 1 2,6,10,15,19,23-hexamethyltetracosane C30H62 1 Commercial source 1 99.9 3 Gas chromatography 2 De-gassed by evacuation 2 99.74 4 Gas chromatography 2 Commercial source 1 99.9 3 Gas chromatography 2 99.74 4 Gas chromatography 1 1 Principal objective of the work UCT XXX 11/11/2025 1 Mass density, kg/m3 Buoyancy - hydrostatic balance with magnetic suspension - one sinker Liquid Direct value, X Liquid 1 Temperature, K 2 Pressure, kPa 1 293.153 6 2 108.6 4 1 808.145 6 1 293.154 6 2 108 4 1 808.142 6 1 293.154 6 2 107 4 1 808.141 6 1 293.153 6 2 106.9 4 1 808.141 6 1 293.148 6 2 19989.7 6 1 819.191 6 1 293.15 6 2 20006.6 6 1 819.197 6 1 293.15 6 2 20005.1 6 1 819.197 6 1 293.15 6 2 19995.3 6 1 819.192 6 1 293.153 6 2 15007.3 6 1 816.56 6 1 293.152 6 2 15003.8 6 1 816.556 6 1 293.151 6 2 15002.5 6 1 816.557 6 1 293.15 6 2 14993.4 6 1 816.551 6 1 293.154 6 2 9998.5 5 1 813.825 6 1 293.153 6 2 9998.5 5 1 813.828 6 1 293.152 6 2 10005 6 1 813.831 6 1 293.149 6 2 5002.8 5 1 811.002 6 1 293.149 6 2 5002.7 5 1 811.004 6 1 293.148 6 2 5004.7 5 1 811.003 6 1 293.155 6 2 998.8 4 1 808.658 6 1 293.154 6 2 999.2 4 1 808.656 6 1 293.153 6 2 1001.2 5 1 808.658 6 1 293.153 6 2 1006.4 5 1 808.661 6 1 293.154 6 2 123.5 4 1 808.133 6 1 293.153 6 2 119.2 4 1 808.132 6 1 293.152 6 2 114.8 4 1 808.13 6 1 293.151 6 2 125.7 4 1 808.137 6 1 298.147 6 2 19996.4 6 1 816.235 6 1 298.147 6 2 19997.9 6 1 816.237 6 1 298.149 6 2 19992.7 6 1 816.233 6 1 298.15 6 2 14998.4 6 1 813.54 6 1 298.149 6 2 15002.7 6 1 813.543 6 1 298.15 6 2 14997.7 6 1 813.541 6 1 298.149 6 2 10006.4 6 1 810.758 6 1 298.149 6 2 10001.6 6 1 810.755 6 1 298.15 6 2 10000.7 6 1 810.755 6 1 298.149 6 2 5002.6 5 1 807.862 6 1 298.15 6 2 5005.2 5 1 807.864 6 1 298.151 6 2 5006 5 1 807.864 6 1 298.151 6 2 1003.4 5 1 805.468 6 1 298.15 6 2 1001.7 5 1 805.468 6 1 298.15 6 2 1002.9 5 1 805.469 6 1 298.151 6 2 1003.1 5 1 805.468 6 1 298.149 6 2 117.2 4 1 804.927 6 1 298.15 6 2 115.9 4 1 804.926 6 1 298.151 6 2 114.3 4 1 804.925 6 1 298.151 6 2 111.3 4 1 804.923 6 1 313.134 6 2 19997.8 6 1 807.431 6 1 313.135 6 2 20002.2 6 1 807.432 6 1 313.137 6 2 20006.3 6 1 807.434 6 1 313.144 6 2 15004.1 6 1 804.563 6 1 313.143 6 2 15002.9 6 1 804.564 6 1 313.143 6 2 15003 6 1 804.563 6 1 313.147 6 2 10009 6 1 801.59 6 1 313.146 6 2 10002.4 6 1 801.587 6 1 313.147 6 2 10002.9 6 1 801.588 6 1 313.153 6 2 5006.5 5 1 798.489 6 1 313.151 6 2 5000.9 5 1 798.487 6 1 313.15 6 2 5002.9 5 1 798.487 6 1 313.15 6 2 1005.2 5 1 795.917 6 1 313.15 6 2 1009.2 5 1 795.92 6 1 313.15 6 2 1004.8 5 1 795.917 6 1 313.151 6 2 111.5 4 1 795.324 6 1 313.151 6 2 114.2 4 1 795.326 6 1 313.151 6 2 115.9 4 1 795.327 6 1 313.15 6 2 125.3 4 1 795.335 6 1 313.151 6 2 126.2 4 1 795.334 6 1 333.156 6 2 20004.3 6 1 795.789 6 1 333.155 6 2 20003.9 6 1 795.79 6 1 333.155 6 2 20004.2 6 1 795.79 6 1 333.155 6 2 15000 6 1 792.676 6 1 333.153 6 2 15004.7 6 1 792.679 6 1 333.152 6 2 15006.2 6 1 792.681 6 1 333.153 6 2 10002.7 6 1 789.437 6 1 333.151 6 2 10003.1 6 1 789.438 6 1 333.151 6 2 10005.4 6 1 789.44 6 1 333.154 6 2 5002.9 5 1 786.047 6 1 333.153 6 2 5002.8 5 1 786.047 6 1 333.152 6 2 5003 5 1 786.048 6 1 333.154 6 2 1010.7 5 1 783.224 6 1 333.152 6 2 1008.5 5 1 783.225 6 1 333.151 6 2 1005.4 5 1 783.223 6 1 333.151 6 2 1005.3 5 1 783.223 6 1 333.151 6 2 1012.2 5 1 783.228 6 1 333.152 6 2 127 4 1 782.588 6 1 333.151 6 2 119.1 4 1 782.582 6 1 333.15 6 2 122.5 4 1 782.584 6 1 353.154 6 2 19996.5 6 1 784.293 6 1 353.155 6 2 20009.5 6 1 784.3 6 1 353.154 6 2 20020.6 6 1 784.308 6 1 353.151 6 2 14995.3 6 1 780.921 6 1 353.151 6 2 14992.8 6 1 780.921 6 1 353.151 6 2 14993.7 6 1 780.921 6 1 353.153 6 2 10022.2 6 1 777.403 6 1 353.151 6 2 10027.7 6 1 777.408 6 1 353.15 6 2 10015.4 6 1 777.401 6 1 353.151 6 2 10014.6 6 1 777.399 6 1 353.152 6 2 5000.3 5 1 773.677 6 1 353.151 6 2 4998.1 5 1 773.676 6 1 353.15 6 2 4999.1 5 1 773.678 6 1 353.153 6 2 1017.2 5 1 770.577 6 1 353.151 6 2 1009.3 5 1 770.573 6 1 353.15 6 2 1000.4 5 1 770.566 6 1 353.151 6 2 129 4 1 769.869 6 1 353.15 6 2 127.4 4 1 769.869 6 1 353.15 6 2 139.1 4 1 769.878 6 1 373.151 6 2 20010.8 6 1 772.93 6 1 373.15 6 2 20000.7 6 1 772.924 6 1 373.151 6 2 20005.6 6 1 772.926 6 1 373.149 6 2 15005.7 6 1 769.263 6 1 373.15 6 2 15004.1 6 1 769.263 6 1 373.152 6 2 15000 6 1 769.257 6 1 373.154 6 2 10007.5 6 1 765.409 6 1 373.154 6 2 10006.4 6 1 765.409 6 1 373.154 6 2 10010.2 6 1 765.412 6 1 373.15 6 2 5014.5 5 1 761.353 6 1 373.151 6 2 5009.6 5 1 761.347 6 1 373.153 6 2 5004.2 5 1 761.342 6 1 373.156 6 2 1003.5 5 1 757.91 6 1 373.155 6 2 1002.5 5 1 757.91 6 1 373.154 6 2 1001.7 5 1 757.911 6 1 373.155 6 2 119.7 4 1 757.129 6 1 373.155 6 2 123 4 1 757.133 6 1 373.154 6 2 119.1 4 1 757.13 6 1 393.148 6 2 20006.8 6 1 761.653 6 1 393.15 6 2 20009 6 1 761.655 6 1 393.152 6 2 19999.7 6 1 761.648 6 1 393.154 6 2 14997.3 6 1 757.669 6 1 393.152 6 2 14999 6 1 757.673 6 1 393.15 6 2 15000.5 6 1 757.675 6 1 393.153 6 2 10004.9 6 1 753.479 6 1 393.153 6 2 10007.9 6 1 753.483 6 1 393.152 6 2 10010 6 1 753.485 6 1 393.156 6 2 5007.5 5 1 749.022 6 1 393.156 6 2 5003.8 5 1 749.018 6 1 393.154 6 2 1005 5 1 745.24 6 1 393.154 6 2 1011.1 5 1 745.246 6 1 393.15 6 2 124.5 4 1 744.381 6 1 393.15 6 2 121.5 4 1 744.378 6 1 413.152 6 2 20004.3 6 1 750.466 6 1 413.153 6 2 20008.1 6 1 750.469 6 1 413.153 6 2 15004.2 6 1 746.158 6 1 413.151 6 2 15002.6 6 1 746.159 6 1 413.149 6 2 10011.3 6 1 741.591 6 1 413.148 6 2 10007.2 6 1 741.588 6 1 413.148 6 2 10021.1 6 1 741.6 6 1 413.154 6 2 5009.6 5 1 736.697 6 1 413.153 6 2 4997.8 5 1 736.686 6 1 413.152 6 2 5005.9 5 1 736.695 6 1 413.151 6 2 1005.3 5 1 732.517 6 1 413.151 6 2 1017.4 5 1 732.53 6 1 413.151 6 2 122.9 4 1 731.559 6 1 413.15 6 2 115.5 4 1 731.552 6 1 433.155 6 2 19999 6 1 739.352 6 1 433.154 6 2 19999.2 6 1 739.352 6 1 433.154 6 2 15002.7 6 1 734.687 6 1 433.153 6 2 14999.1 6 1 734.684 6 1 433.152 6 2 10009.5 6 1 729.707 6 1 433.15 6 2 10007.1 6 1 729.705 6 1 433.15 6 2 10002.2 6 1 729.7 6 1 433.151 6 2 5006.6 5 1 724.335 6 1 433.15 6 2 5006.1 5 1 724.335 6 1 433.15 6 2 1002 5 1 719.708 6 1 433.15 6 2 1003.1 5 1 719.709 6 1 433.15 6 2 1002.7 5 1 719.708 6 1 433.151 6 2 127.4 4 1 718.652 6 1 433.151 6 2 119.3 4 1 718.643 6 1 433.151 6 2 122.4 4 1 718.646 6 1 453.153 6 2 20010.3 6 1 728.327 6 1 453.151 6 2 20004.9 6 1 728.323 6 1 453.15 6 2 19997.5 6 1 728.316 6 1 453.152 6 2 15002.5 6 1 723.261 6 1 453.151 6 2 14999.4 6 1 723.259 6 1 453.15 6 2 10005.3 6 1 717.826 6 1 453.15 6 2 10007.2 6 1 717.828 6 1 453.15 6 2 5008.7 5 1 711.929 6 1 453.15 6 2 5007.6 5 1 711.926 6 1 453.15 6 2 5007.1 5 1 711.927 6 1 453.151 6 2 1003.5 5 1 706.799 6 1 453.15 6 2 1005.4 5 1 706.801 6 1 453.152 6 2 128.2 4 1 705.619 6 1 453.152 6 2 123 4 1 705.614 6 1 453.152 6 2 123.4 4 1 705.614 6 1 293.153 6 2 20008.7 6 1 819.183 6 1 293.152 6 2 20004.8 6 1 819.18 6 1 293.152 6 2 20002.6 6 1 819.18 6 1 293.153 6 2 15006.3 6 1 816.543 6 1 293.153 6 2 14999.8 6 1 816.539 6 1 293.153 6 2 15001.4 6 1 816.54 6 1 293.151 6 2 10017.2 6 1 813.821 6 1 293.151 6 2 10001.6 6 1 813.813 6 1 293.153 6 2 5006.4 5 1 810.986 6 1 293.151 6 2 5013.5 5 1 810.991 6 1 293.153 6 2 1010.7 5 1 808.649 6 1 293.152 6 2 1003.2 5 1 808.645 6 1 293.151 6 2 1006.4 5 1 808.647 6 1 293.151 6 2 123.9 4 1 808.119 6 1 293.151 6 2 118.7 4 1 808.117 6 1 293.152 6 2 122.3 4 1 808.119 6 1 293.152 6 2 125.8 4 1 808.122 6 1 293.153 6 2 128.7 4 1 808.124 6 1 1 Principal objective of the work UCT XXX 11/11/2025 1 Mass density, kg/m3 Vibrating tube method Liquid Direct value, X Liquid 1 Temperature, K 2 Pressure, kPa 1 273.15 5 2 98 3 1 820.985 6 1 278.15 5 2 98 3 1 817.75 6 1 283.15 5 2 98 3 1 814.52 6 1 288.15 5 2 98 3 1 811.294 6 1 293.15 5 2 98 3 1 808.077 6 1 298.15 5 2 98 3 1 804.87 6 1 303.15 5 2 98 3 1 801.665 6 1 308.15 5 2 98 3 1 798.466 6 1 313.15 5 2 98 3 1 795.275 6 1 318.15 5 2 98 3 1 792.083 6 1 323.15 5 2 98 3 1 788.895 6 1 328.15 5 2 98 3 1 785.707 6 1 333.15 5 2 98 3 1 782.522 6 1 338.15 5 2 98 3 1 779.339 6 1 343.15 5 2 98 3 1 776.158 6 1 348.15 5 2 98 3 1 772.974 6 1 353.15 5 2 98 3 1 769.796 6 1 358.15 5 2 98 3 1 766.614 6 1 363.15 5 2 98 3 1 763.435 6 1 273.15 5 2 98.8 3 1 820.976 6 1 278.15 5 2 98.8 3 1 817.748 6 1 283.15 5 2 98.8 3 1 814.513 6 1 288.15 5 2 98.8 3 1 811.293 6 1 293.15 5 2 98.8 3 1 808.076 6 1 298.15 5 2 98.8 3 1 804.865 6 1 303.15 5 2 98.8 3 1 801.663 6 1 308.15 5 2 98.8 3 1 798.465 6 1 313.15 5 2 98.8 3 1 795.269 6 1 318.15 5 2 98.8 3 1 792.078 6 1 323.15 5 2 98.8 3 1 788.891 6 1 328.15 5 2 98.8 3 1 785.703 6 1 333.15 5 2 98.8 3 1 782.517 6 1 338.15 5 2 98.8 3 1 779.335 6 1 343.15 5 2 98.8 3 1 776.154 6 1 348.15 5 2 98.8 3 1 772.97 6 1 353.15 5 2 98.8 3 1 769.794 6 1 358.15 5 2 98.8 3 1 766.609 6 1 363.15 5 2 98.8 3 1 763.428 6 1 313.15 5 2 98.8 3 1 795.267 6 1 1 Principal objective of the work UCT XXX 11/11/2025 1 Vapor or sublimation pressure, kPa Diaphragm manometer Liquid Direct value, X Liquid Gas 1 Temperature, K 1 387.99 5 1 .000215 3 1 387.99 5 1 .000212 3 1 387.99 5 1 .000217 3 1 392.98 5 1 .000331 3 1 392.97 5 1 .000333 3 1 392.97 5 1 .000337 3 1 397.93 5 1 .00051 3 1 397.93 5 1 .000509 3 1 397.93 5 1 .000512 3 1 402.9 5 1 .000777 3 1 402.9 5 1 .000775 3 1 402.9 5 1 .000776 3 1 407.86 5 1 .001167 4 1 407.86 5 1 .001165 4 1 407.86 5 1 .00117 4 1 412.82 5 1 .001738 4 1 412.83 5 1 .001736 4 1 412.83 5 1 .001744 4 1 417.79 5 1 .002563 4 1 417.78 5 1 .002557 4 1 417.78 5 1 .002552 4 1 422.76 5 1 .00372 4 1 422.77 5 1 .003715 4 1 422.76 5 1 .003717 4 1 427.73 5 1 .005352 4 1 427.73 5 1 .00535 4 1 427.73 5 1 .005346 4 1 432.7 5 1 .007611 4 1 432.7 5 1 .007605 4 1 432.7 5 1 .007604 4 1 437.65 5 1 .01066 4 1 437.65 5 1 .01067 4 1 437.65 5 1 .01067 4 1 442.64 5 1 .01478 4 1 442.64 5 1 .01477 4 1 442.64 5 1 .01479 4 1 447.61 5 1 .02019 4 1 447.61 5 1 .02019 4 1 447.61 5 1 .0202 4 1 452.58 5 1 .02747 4 1 452.58 5 1 .02744 4 1 452.58 5 1 .02742 4 1 457.56 5 1 .03692 4 1 457.55 5 1 .03686 4 1 457.55 5 1 .03683 4 1 462.51 5 1 .04905 4 1 462.52 5 1 .04902 4 1 462.52 5 1 .04901 4 1 2 Principal objective of the work UCT XXX 11/11/2025 1 Molar heat capacity at constant pressure, J/K/mol Large sample (1 g) scanning calorimetry Liquid Direct value, X Liquid Pressure, kPa 101.325 6 1 Temperature, K 1 260 5 1 835.5 4 1 265 5 1 842.8 4 1 270 5 1 849.6 4 1 275 5 1 856.8 4 1 280 5 1 863.5 4 1 285 5 1 871 4 1 290 5 1 878.7 4 1 295 5 1 886.6 4 1 300 5 1 894.4 4 1 305 5 1 902.4 4 1 310 5 1 910.3 4 1 315 5 1 918.4 4 1 320 5 1 926.4 4 1 325 5 1 934.6 4 1 330 5 1 942.9 4 1 335 5 1 951.1 4 1 340 5 1 959.5 4 1 345 5 1 967.8 4 1 350 5 1 976.2 4 1 2 Principal objective of the work UCT XXX 11/11/2025 1 Molar heat capacity at constant pressure, J/K/mol DSC Liquid Direct value, X Liquid Pressure, kPa 101.325 6 1 Temperature, K 1 304.5 5 1 901 3 1 309.5 5 1 907 3 1 314.5 5 1 918 3 1 319.4 5 1 927 3 1 324.4 5 1 934 3 1 329.4 5 1 945 3 1 334.4 5 1 951 3 1 339.4 5 1 960 3 1 344.3 5 1 966 3 1 349.3 5 1 977 3 1 354.3 5 1 984 3 1 359.3 5 1 993 3 1 364.3 5 1 1001 4 1 369.3 5 1 1011 4 1 374.2 5 1 1018 4 1 379.2 5 1 1026 4 1 384.2 5 1 1033 4 1 389.2 5 1 1041 4 1 394.1 5 1 1051 4 1 399.1 5 1 1060 4 1 404.1 5 1 1068 4 1 409.1 5 1 1075 4 1 414.1 5 1 1083 4 1 419.1 5 1 1094 4 1 424 5 1 1101 4 1 429 5 1 1109 4 1 434 5 1 1116 4 1 439 5 1 1124 4 1 443.9 5 1 1131 4 1 448.9 5 1 1140 4 1 453.9 5 1 1145 4 1 458.9 5 1 1154 4 1 463.8 5 1 1161 4 1 468.8 5 1 1169 4 1 473.8 5 1 1179 4 1 478.8 5 1 1185 4 1 483.7 5 1 1194 4 1 488.7 5 1 1197 4 1 493.7 5 1 1205 4 1 498.7 5 1 1215 4 1 503.7 5 1 1224 4 1 508.6 5 1 1225 4 1 513.6 5 1 1227 4 1 518.6 5 1 1231 4