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.
Structure and properties Structure and properties Index of refraction , n D1.3727 at 20 °C Abbe number ? Dielectric constant , εr1.890 ε0 at 20 °C Bond strength ? Bond length Bond angle ? Magnetic susceptibility ? Surface tension 20.5 dyn/cm at 0 °C 18.4 dyn/cm at 20 °C 13.4 dyn/cm at 68 °C Viscosity 0.4012 mPa·s at 0 °C 0.3258 mPa·s at 20 °C 0.2798 mPa·s at 40 °C 0.2288 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 change of fusion , ΔfusH o13 kJ/mol Std entropy change of fusion , ΔfusS o70 J/(mol·K) Std enthalpy change of vaporization , ΔvapH o28.85 kJ/mol at 68.8 °C Std entropy change of vaporization , ΔvapS o? J/(mol·K) Solid properties Std enthalpy change of formation , ΔfH osolid? kJ/mol Standard molar entropy , S osolid? J/(mol K) Heat capacity , cp ? J/(mol K) Liquid properties Std enthalpy change of formation , ΔfH oliquid–198.7 kJ/mol Standard molar entropy , S oliquid295 J/(mol K) Enthalpy of combustion , ΔcH o–4163 kJ/mol Heat capacity , cp 197.66 J/(mol K) Gas properties Std enthalpy change of formation , ΔfH ogas–167.2 kJ/mol Standard molar entropy , S ogas388.82 J/(mol K) Heat capacity , cp 142.6 J/(mol K) at 25 °C van der Waals' constants 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.
log10 of Hexane vapor pressure. Uses formula: log e P m m H g = {\displaystyle \scriptstyle \log _{e}P_{mmHg}=}log e ( 760 101.325 ) − 13.99935 log e ( T + 273.15 ) − 7284.572 T + 273.15 + 105.9605 + 1.410325 × 10 − 5 ( T + 273.15 ) 2 {\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-13.99935\log _{e}(T+273.15)-{\frac {7284.572}{T+273.15}}+105.9605+1.410325\times 10^{-5}(T+273.15)^{2}} obtained from CHERICDistillation data BP Temp. °C % by mole ethanol Vapor-Liquid Equilibrium of n -Hexane/Ethanol P = 760 mm Hg BP Temp. °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 6.5Vapor-Liquid Equilibrium of n -Hexane/Methanol P = 760 mm Hg BP Temp. °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 95.0Vapor-Liquid Equilibrium of n -Hexane/n -Heptane P = 101.0 kPa BP Temp. °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 68.66 100.00 100.00Vapor-Liquid Equilibrium of n -Hexane/Ethanol P = 760 mm Hgliquid 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 Equilibrium of n -Hexane/Methanol P = 760 mm HgBP Temp. °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 Equilibrium of n -Hexane/n -Heptane P = 101.0 kPaBP Temp. °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
Except where noted otherwise, data relate to Standard temperature and pressure . Reliability of data general note. Linstrom, Peter (1997). . National Institute of Standards and Technology. doi :. {{cite journal}}:Cite journal requires |journal= (help)