Isopropyl alcohol (data page)

Chemical data page From Wikipedia, the free encyclopedia

This page provides supplementary chemical data on isopropanol.

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 eChemPortal, and follow its directions.

Structure and properties

More information Structure and properties ...
Structure and properties
Dielectric constant, εr 18.23 ε0 at 25 °C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility ?
Surface tension 21.7 dyn/cm at 20 °C
Viscosity[1] 4.5646 mPa·s at 0 °C
2.3703 mPa·s at 20 °C
1.3311 mPa·s at 40 °C
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Thermodynamic properties

More information Phase behavior, Solid properties ...
Phase behavior
Triple point 184.9 K (−88.2 °C), ? Pa
Std entropy change
of fusion, ΔfusSo		 28.6 J/(mol·K)
Std entropy change
of vaporization, ΔvapSo		 124 J/(mol·K)
Solid properties
Std enthalpy change
of formation, ΔfHosolid		 ? kJ/mol
Standard molar entropy,
Sosolid		 ? J/(mol K)
Heat capacity, cp 0.212 J/(mol K) at −200 °C
Liquid properties
Std enthalpy change
of formation, ΔfHoliquid		 −318.2 kJ/mol
Standard molar entropy,
Soliquid		 180 J/(mol K)
Heat capacity, cp 2.68 J/(gK) at 20 °C-25 °C
Gas properties
Std enthalpy change
of formation, ΔfHogas		 −261.1 kJ/mol
Standard molar entropy,
Sogas		 333 J/(mol K)
Heat capacity, cp 1.54 J/(gK) at 25 °C
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Vapor pressure of Iso-propyl Alcohol

P in mm Hg11040100400760152038007600152003040045600
T in °C−26.12.423.839.567.882.5101.3130.2155.7186.0220.2 —

Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.

Isopropanol vapor pressure (logarithmic scale) vs temperature. Drawn using data published in [2][3]

Distillation data

More information BPtemp. °C, % by mole isopropanol ...
Vapor-liquid equilibrium
for isopropanol/water[4]
P = 760 mm Hg
BP
temp.
°C		 % by mole isopropanol
liquidvapor
82.2100.00100.00
81.4895.3593.25
80.7087.2583.40
80.3780.9077.45
80.2376.5073.70
80.1169.5569.15
80.1666.0567.15
80.1564.6066.45
80.3155.9062.55
80.3851.4560.75
80.6744.6059.20
80.9038.3557.00
81.2829.8055.10
81.2929.7555.40
81.2328.3555.30
81.6224.5053.90
81.7519.3553.20
81.5818.9553.75
81.9916.6552.15
82.3212.1551.20
82.7010.0050.15
84.575.7045.65
88.053.6536.55
93.401.6021.15
95.171.1516.30
100.00.000.00
    
Vapor-liquid equilibrium
for isopropanol/methanol[4]
P = 101.325 kPa
BP
temp.
°C		 % by mole methanol
liquidvapor
64.37100.0100.0
67.3481.2690.32
67.6479.4589.10
69.5468.6481.73
70.7761.7276.52
71.8855.9671.76
72.7851.0367.78
73.8046.3463.08
74.8539.7556.21
75.6535.5051.62
76.3631.7146.91
77.9323.7935.98
78.6719.4930.22
79.4515.4524.40
80.0412.3019.56
80.579.3014.66
80.828.4312.43
82.200.00.0
    
Vapor-liquid equilibrium
for isopropanol/acetone[4]
P = 101.325 kPa
BP
temp.
°C		 % by mole acetone
liquidvapor
77.926.1219.90
76.718.2825.52
71.5019.5947.03
70.9920.9148.90
69.2026.0155.29
68.8527.1056.50
65.9137.5566.12
63.5548.1273.37
63.4248.7473.75
62.4653.7776.63
62.3754.2776.91
61.8557.2278.49
61.8657.1278.43
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See also

Spectral data

More information UV-Vis, IR ...
UV-Vis
λmax 205 nm
Extinction coefficient, ε 100.2 m2/mol
IR
Major absorption bands 3334, 2970, 1466, 1378, 1160, 1128, 951, 817, 639 cm−1
NMR
Proton NMR  
Carbon-13 NMR  
Other NMR data  
MS
Masses of
main fragments		 m/z (% of relative intensity): 45 (100), 43 (19.1), 27 (16.8), 29 (12.5), 19 (9.9), 15 (9.5), 41 (8.2), 31 (6.8), 39 (6.6), 42 (4.4)
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References

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