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Isopropyl alcohol (data page)

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Isopropyl alcohol (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 (SIRI, and follow its directions.

Structure and properties

Structure and properties
Index of refraction, nD 1.3776 at 20°C
Abbe number ?
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

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
of fusion
, ΔfusHo
5.28 kJ/mol
Std entropy change
of fusion
, ΔfusSo
28.6 J/(mol·K)
Std enthalpy change
of vaporization
, ΔvapHo
44.0 kJ/mol
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

Vapor pressure of liquid

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.

Distillation data

See also

Vapor-liquid Equilibrium
for Isopropanol/Water
[4]
P = 760 mm Hg
BP
Temp.
°C
 % 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 Equilibrium
for Isopropanol/Methanol
[4]
P = 101.325 kPa
BP
Temp.
°C
 % 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 Equilibrium
for Isopropanol/Acetone
[4]
P = 101.325 kPa
BP
Temp.
°C
 % 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

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
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

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

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