Azeotrope tables


This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight, the boiling point of a component, the boiling point of a mixture, and the specific gravity of the mixture. Boiling points are reported at a pressure of 760 mm Hg unless otherwise stated. Where the mixture separates into layers, values are shown for upper and lower layers.
The data were obtained from Lange's 10th edition and CRC Handbook of Chemistry and Physics 44th edition unless otherwise noted.
A list of 15825 binary and ternary mixtures was collated and published by the American Chemical Society. An azeotrope databank is also available online through the University of Edinburgh.

Binary azeotropes



component 1b.p.
comp. 1 		component 2b.p.
comp. 2 		b.p.
azeo. 		% wt
comp. 1		% wt
comp. 2		spec.
grav.
acetaldehyde21.0diethyl ether34.620.576.024.00.762
acetaldehyde21.0n-butane–0.5–7.016.084.0
acetamide222.0benzaldehyde179.5178.66.593.5
acetamide222.0nitrobenzene210.9202.024.076.0
acetamide222.0o-xylene144.1142.611.089.0
acetonitrile82.0ethyl acetate77.1574.823.077.0
acetonitrile82.0toluene110.681.176.024.0
acetylene–86.6ethane–88.3–94.540.759.3
aniline184.4o-cresol191.5191.38.092.0
carbon disulfide46.2diethyl ether34.634.41.099.00.719
carbon disulfide46.21,1-dichloroethane57.246.094.06.0
carbon disulfide46.2methyl ethyl ketone79.645.984.715.31.157
carbon disulfide46.2ethyl acetate77.146.1973
carbon disulfide46.2methyl acetate57.040.27327
chloroform61.2methyl ethyl ketone79.679.917.083.00.877
chloroform61.2n-hexane68.760.072.028.01.101
carbon tetrachloride76.8methyl ethyl ketone79.973.871.029.01.247
carbon tetrachloride76.8ethylene dichloride84.075.378.022.01.500
carbon tetrachloride76.8ethyl acetate77.174.857.043.01.202
cyclohexane80.74ethyl acetate77.1572.846.054.0
cyclohexane80.74ethyl nitrate88.774.564.036.0
diethyl ether34.6methyl formate31.5028.244.056.0
diethyl ether34.6methylene chloride4040.83070
nitromethane101.0toluene110.896.555.045.0
tetrahydrofuran65.6chloroform61.272.534.565.5
tetrahydrofuran65.6n-hexane6963.046.553.5
toluene110.63pyridine115.3110.278.022.0
toluene110.632-methyltetrahydrofuran80.2none--
propylene glycol188.2aniline184.4179.54357
propylene glycol188.2o-xylene144.4135.81090
propylene glycol188.2toluene110.6110.51.598.5

Ternary azeotropes

Tables of various ternary azeotropes. Fraction percentages are given by weight.


2nd componentb.p.
2nd comp. 		3rd componentb.p.
3rd comp. 		b.p.
azeo. 		% wt
1st		% wt
2nd		% wt
3rd		spec.
grav
ethanol78.4ethyl acetate77.1 70.37.89.083.20.901
ethanol78.4cyclohexane80.8 62.171776
ethanol78.4benzene80.2 64.97.4
U 1.3
L 43.1		18.5
U 12.7
L 52.1		74.1
U 86.0
L 4.8
U 0.866
L 0.892
ethanol78.4chloroform61.2 55.53.5
U 80.8
L 0.5		4.0
U 18.2
L 3.7		92.5
U 1.0
L 95.8
U 0.976
L 1.441
ethanol78.4carbon tetrachloride86.8 61.84.39.786.0
ethanol78.4carbon tetrachloride86.8 61.83.4
U 44.5
L <0.1		10.3
U 48.5
L 5.2		86.3
U 7.0
L 94.8
U 0.935
L 1.519
ethanol78.4ethylene chloride83.7 66.751778
ethanol78.4acetonitrile82.0 72.91.055.044.0
ethanol78.4toluene110.6 74.412.0
U 3.1
L 20.7		37.0
U 15.6
L 54.8		51.0
U 81.3
L 24.5
U 0.849
L 0.855
ethanol78.4methyl ethyl ketone79.6 73.211.014.075.00.832
ethanol78.4n-hexane69.0 56.03.0
U 0.5
L 19.0		12.0
U 3.0
L 75.0		85.0
U 96.5
L 6.0
U 0.672
L 0.833
ethanol78.4n-heptane98.4 68.86.1
U 0.2
L 15.0		33.0
U 5.0
L 75.9		60.9
U 94.8
L 9.1
U 0.686
L 0.801
ethanol78.4carbon disulfide46.2 41.31.65.093.4
n-propanol97.2cyclohexane80.8 66.68.510.081.5
n-propanol97.2benzene80.2 68.58.69.082.4
n-propanol97.2carbon tetrachloride76.8 65.45
U 84.9
L 1.0		11
U 15.0
L 11.0		84
U 0.1
L 88.0
U 0.979
L 1.436
n-propanol97.2diethyl ketone102.2 81.2202060
n-propanol97.2n-propyl acetate101.6 82.221.019.559.5
Isopropyl alcohol82.5cyclohexane80.8 64.37.518.574.0
Isopropyl alcohol82.5cyclohexane80.8 66.17.521.571.0
Isopropyl alcohol82.5benzene80.2 66.57.518.773.8
Isopropyl alcohol82.5benzene80.2 65.78.2
U 2.3
L 85.1		19.8
U 20.2
L 14.4		72.0
U 77.5
L 0.5
U 0.855
L 0.966
Isopropyl alcohol82.5methyl ethyl ketone79.6 73.411.01.088.00.834
Isopropyl alcohol82.5toluene110.6 76.313.1
U 8.5
L 61.0		38.2
U 38.2
L 38.0		48.7
U 53.3
L 1.0
U 0.845
L 0.930
allyl alcohol97.0n-hexane69.0 59.75
U 0.5
L 64.4		5
U 3.6
L 34.8		90
U 95.9
L 0.8
U 0.668
L 0.964
allyl alcohol97.0benzene80.2 68.28.6
U 0.6
L 80.9		9.2
U 8.7
L 17.7		82.2
U 90.7
L 0.4
U 0.877
L 0.985
allyl alcohol97.0cyclohexane80.8 66.281181
allyl alcohol97.0carbon tetrachloride76.8 65.25
U 71.7
L 0.8		11
U 25.6
L 10.1		84
U 2.7
L 89.1
U 0.777
L 1.464
benzene80.1acetonitrile82.0 66.08.268.523.3
benzene80.1methyl ethyl ketone79.6 68.28.8
U 0.6
L 94.7		65.1
U 71.3
L 0.1		26.1
U 28.1
L 5.2
U 0.858
L 0.992
methyl ethyl ketone79.6carbon tetrachloride76.8 65.73.0
U 94.4
L 0.1		22.2
U 5.5
L 22.6		74.8
U 0.1
L 77.3
U 0.993
L 1.313
methyl ethyl ketone79.6cyclohexane81.0 63.65.0
U 0.6
L 89.9		60.0
U 37.0
L 10.0		35.0
U 62.4
L 0.1
U 0.769
L 0.98
chloroform61.2methanol64.65 52.64.0
U 27.0
L 3.0		81.0
U 32.0
L 83.0		15.0
U 41.0
L 14.0
U 1.022
L 1.399
chloroform61.2acetone‡56.5 60.44.057.638.4

‡Saddle azeotrope
2nd componentb.p.
2nd comp. 		3rd componentb.p.
3rd comp. 		b.p.
azeo. 		% wt
1st		% wt
2nd		% wt
3rd		spec.
grav
acetone56.5chloroform‡61.2 57.523.030.047.0
acetone56.5methyl acetate57.0 53.717.45.876.80.898
acetone56.5cyclohexane81.4 51.516.043.540.5
methyl acetate57.1carbon disulfide46.2 37.0
methyl acetate57.1cyclohexane81.4 50.817.848.633.6
methyl acetate57.1n-hexane69.0 45.014.027.059.00.73

‡Saddle azeotrope