Hexane (data page)

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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 such as SIRI, and follow its directions. MSDS is available at Fisher Scientific.

Structure and properties

Structure and properties
Index of refraction, nD	1.3749 at 20°C
Abbe number	?
Dielectric constant, εr	1.890 ε0 at 20 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension[1]	20.5 mPa·s at 0°C 18.4 mPa·s at 20°C 13.4 mPa·s at 68°C
Viscosity[1]	0.4012 at 0°C 0.3258 at 20°C 0.2798 at 40°C 0.2288 at 80°C

Thermodynamic properties

Phase behavior
Triple point	178.0 K (–95.1 °C), ? Pa
Critical point	507.6 K (234.5 °C), 3020 Pa
Std enthalpy change of fusion, ΔfusHo	13 kJ/mol
Std entropy change of fusion, ΔfusSo	70 J/(mol·K)
Std enthalpy change of vaporization, ΔvapHo	28.85 kJ/mol at 68.8°C
Std entropy change of vaporization, ΔvapSo	? J/(mol·K)
Solid properties
Std enthalpy change of formation, ΔfHosolid	? kJ/mol
Standard molar entropy, Sosolid	? J/(mol K)
Heat capacity, cp	? J/(mol K)
Liquid properties
Std enthalpy change of 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 change of 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' constants[1]	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	15600	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 Equilibrium of n-Hexane/Ethanol[1] 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 6.5

Vapor-Liquid Equilibrium of n-Hexane/Methanol[1] 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 95.0

Vapor-Liquid Equilibrium of n-Hexane/n-Heptane[1] 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 68.66 100.00 100.00

Spectral data

UV-Vis
λmax	? nm
Extinction coefficient, ε	?
IR
Major absorption bands	? cm−1
NMR
Proton NMR
Carbon-13 NMR
Other NMR data
MS
Masses of main fragments

References

• NIST Standard Reference Database.

Except where noted otherwise, data relate to standard ambient temperature and pressure.

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