This page provides supplementary chemical data on n-hexane.
Material Safety Data Sheet
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source and follow its directions. eChemPortal Science Stuff Fisher Scientific.
Structure and properties
Structure and properties Index of refraction, nD 1.3727 at 20 °C Abbe number? Dielectric constant, εr 1.890 ε0 at 20 °C Bond strength ? Bond length Bond angle ? Magnetic susceptibility ? Surface tensionLange's Handbook of Chemistry, 10th ed, pp 1661-1663 20.5 dyn/cm at 0 °C18.4 dyn/cm at 20 °C13.4 dyn/cm at 68 °C ViscosityLange's Handbook of Chemistry, 10th ed, pp 1669-1674 0.4012 mPa·s at 0 °C0.3258 mPa·s at 20 °C0.2798 mPa·s at 40 °C0.2288 mPa·s at 80 °C
Thermodynamic properties
Phase behavior Triple point 178.0 K (–95.1 °C), 1.23 Pa Critical point 507.6 K (234.5 °C), 3020 kPa Std enthalpy changeof fusion, ΔfusHo 13 kJ/mol Std entropy changeof fusion, ΔfusSo 70 J/(mol·K) Std enthalpy changeof vaporization, ΔvapHo 28.85 kJ/mol at 68.8 °C Std entropy changeof vaporization, ΔvapSo ? J/(mol·K) Solid properties Std enthalpy changeof formation, ΔfHosolid ? kJ/mol Standard molar entropy,Sosolid ? J/(mol K) Heat capacity, cp ? J/(mol K) Liquid properties Std enthalpy changeof formation, ΔfHoliquid –198.7 kJ/mol Standard molar entropy,Soliquid 295 J/(mol K) Enthalpy of combustion, ΔcHo –4163 kJ/mol Heat capacity, cp 197.66 J/(mol K) Gas properties Std enthalpy changeof formation, ΔfHogas –167.2 kJ/mol Standard molar entropy,Sogas 388.82 J/(mol K) Heat capacity, cp 142.6 J/(mol K) at 25 °C van der Waals' constantsLange's Handbook of Chemistry 10th ed, pp 1522-1524 a = 2471 L2 kPa/mol2 b = 0.1735 liter per mole
Vapor pressure of liquid P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600 T in °C –53.9 –25.0 –2.3 15.8 49.6 68.7 93.0 131.7 166.6 209.4 — — Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
Distillation data Vapor-Liquid Equilibriumof n-Hexane/EthanolP = 760 mm Hg BPTemp.°C % by mole ethanol liquid vapor 76.0 99.0 90.5 73.2 98.0 80.7 67.4 94.0 63.5 65.9 92.0 58.0 61.8 84.8 46.8 59.4 75.5 39.5 58.7 66.7 37.0 58.35 54.8 36.0 58.1 41.2 35.0 58.0 33.0 34.0 58.25 27.5 33.0 58.45 23.5 32.5 59.15 10.2 29.0 60.2 4.5 25.5 63.5 1.0 16.0 66.7 0.6 6.5 Vapor-Liquid Equilibriumof n-Hexane/MethanolP = 760 mm Hg BPTemp.°C % by mole methanol liquid vapor 56.9 1.0 30.0 51.3 2.2 41.8 51.2 4.0 43.9 50.5 9.5 47.7 49.9 17.5 49.1 50.0 28.3 49.6 49.9 40.5 49.7 49.0 52.5 50.2 49.9 70.4 50.0 49.9 72.4 50.0 50.2 84.6 51.6 50.1 85.4 51.6 50.2 87.5 51.5 51.4 90.6 55.0 51.2 90.6 55.1 51.7 92.2 56.0 51.6 92.3 56.0 52.8 94.9 61.2 53.8 95.7 63.5 54.7 96.5 66.4 55.8 96.5 69.5 55.6 96.8 69.4 58.2 97.7 76.8 57.9 97.8 75.5 63.0 99.3 93.5 63.5 99.55 95.0 Vapor-Liquid Equilibriumof n-Hexane/n-HeptaneP = 101.0 kPa BPTemp.°C % by mole hexane liquid vapor 98.32 0.00 0.00 96.30 3.83 8.52 94.03 9.64 19.86 92.35 13.63 27.31 90.37 19.04 36.00 88.26 24.59 44.07 85.96 31.46 52.58 83.22 39.53 62.36 82.41 43.21 65.34 80.80 48.53 70.30 79.78 51.23 72.70 78.79 55.71 76.22 77.12 61.87 80.74 75.57 68.24 84.95 74.98 70.12 86.15 73.51 76.79 89.93 81.40 81.60 92.40 70.59 89.91 96.37 68.66 100.00 100.00
Spectral data
UV-Vis λmax ? nm Extinction coefficient, ε ? IR Major absorption bands ? cm−1 NMR Proton NMR (CDCl3, 400 MHz) δ 1.35-1.23 (m, 8H), 0.91-0.86 (m, 6H) Carbon-13 NMR (CDCl3, 25 MHz) δ 31.9, 22.9, 12.2 Other NMR data MS Masses of main fragments
References