Chemical data page
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
Thermodynamic properties
Phase behavior
Triple point
184.9 K (−88.2 °C), ? Pa
Critical point
508.7 K (235.6 °C), 5370 kPa
Std enthalpy change , Δfus H o 5.28 kJ/mol
Std entropy change , Δfus S o 28.6 J/(mol·K)
Std enthalpy change , Δvap H o 44.0 kJ/mol
Std entropy change , Δvap S o 124 J/(mol·K)
Solid properties
Std enthalpy change , Δf H o solid
? kJ/mol
Standard molar entropy ,S o solid
? J/(mol K)
Heat capacity , cp
0.212 J/(mol K) at −200°C
Liquid properties
Std enthalpy change , Δf H o liquid
−318.2 kJ/mol
Standard molar entropy ,S o liquid
180 J/(mol K)
Heat capacity , cp
2.68 J/(gK) at 20°C-25°C
Gas properties
Std enthalpy change , Δf H o gas
−261.1 kJ/mol
Standard molar entropy ,S o gas
333 J/(mol K)
Heat capacity , cp
1.54 J/(gK) at 25°C
Vapor pressure of Iso-propyl Alcohol
P in mm Hg 1
10
40
100
400
760
1520
3800
7600
15200
30400
45600
T in °C −26.1
2.4
23.8
39.5
67.8
82.5
101.3
130.2
155.7
186.0
220.2
—
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
Vapor-liquid equilibrium [ 4] P = 760 mm Hg
BP
% by mole isopropanol
liquid
vapor
82.2
100.00
100.00
81.48
95.35
93.25
80.70
87.25
83.40
80.37
80.90
77.45
80.23
76.50
73.70
80.11
69.55
69.15
80.16
66.05
67.15
80.15
64.60
66.45
80.31
55.90
62.55
80.38
51.45
60.75
80.67
44.60
59.20
80.90
38.35
57.00
81.28
29.80
55.10
81.29
29.75
55.40
81.23
28.35
55.30
81.62
24.50
53.90
81.75
19.35
53.20
81.58
18.95
53.75
81.99
16.65
52.15
82.32
12.15
51.20
82.70
10.00
50.15
84.57
5.70
45.65
88.05
3.65
36.55
93.40
1.60
21.15
95.17
1.15
16.30
100.0
0.00
0.00
Vapor-liquid equilibriummethanol [ 4] P = 101.325 kPa
BP
% by mole methanol
liquid
vapor
64.37
100.0
100.0
67.34
81.26
90.32
67.64
79.45
89.10
69.54
68.64
81.73
70.77
61.72
76.52
71.88
55.96
71.76
72.78
51.03
67.78
73.80
46.34
63.08
74.85
39.75
56.21
75.65
35.50
51.62
76.36
31.71
46.91
77.93
23.79
35.98
78.67
19.49
30.22
79.45
15.45
24.40
80.04
12.30
19.56
80.57
9.30
14.66
80.82
8.43
12.43
82.20
0.0
0.0
Vapor-liquid equilibriumacetone [ 4] P = 101.325 kPa
BP
% by mole acetone
liquid
vapor
77.92
6.12
19.90
76.71
8.28
25.52
71.50
19.59
47.03
70.99
20.91
48.90
69.20
26.01
55.29
68.85
27.10
56.50
65.91
37.55
66.12
63.55
48.12
73.37
63.42
48.74
73.75
62.46
53.77
76.63
62.37
54.27
76.91
61.85
57.22
78.49
61.86
57.12
78.43
See also
Spectral data
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
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)
References
^ Lange's Handbook of Chemistry , 10th ed. pp 1669–1674^ Parks, J. S.; B. Barton (1928). "Vapor pressure data for isopropyl alcohol and tertiary butyl alcohol". Journal of the American Chemical Society . 50 : 24– 26. doi :10.1021/ja01388a004 . ^ Barr-David, F; B. F. Dodge (1959). "Vapor-Liquid Equilibrium at High Pressures. The Systems Ethanol-Water and 2-Propanol-Water". Journal of Chemical and Engineering Data . 4 (2): 107– 121. doi :10.1021/je60002a003 . ^ a b c "Binary Vapor-Liquid Equilibrium Data" (Queriable database) . Chemical Engineering Research Information Center. Retrieved 5 May 2007 .
