Azeotrope tables

 ( Chemistry-related Lists ) 

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 (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point ( b.p.) 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 ( U) and lower ( L) layers.

The data were obtained from Lange's 10th edition Lange's Handbook of Chemistry, 10th ed. pp. 1496–1505 and CRC Handbook of Chemistry and Physics 44th edition CRC Handbook of Chemistry and Physics, 44th ed. pp. 2143–2184 unless otherwise noted (see color code table).

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.

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Binary azeotropes

	{ class="wikitable"	+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
with various alcohols
95.5	0.804
64.7	No azeotrope
71.7	0.866
87.7	0.818
55.5 U 79.9 L 7.7	U 0.849 L 0.990
67.9	0.863
70.0 U 85.0 L 8.7	U 0.839 L 0.988
72.9	0.905
with various
acetic acid ‡	118.1	No azeotrope
17.7	1.016
18.4	1.007
with
68	1.405
20.24	1.102
47.5	1.481
57
with various
97.2 U 0.8 L 99.8	U 1.004 L 1.491
95.9 U 0.03 L 99.97	U 1.000 L 1.597
99.6 U 2.0 99.9	U 1.009 L 1.328
with various
91.9 U 96.7 L 8.7	U 0.907 L 0.999
0.940
isopropyl acetate	88.7	75.9	88.9
with various other
56.5	No azeotrope
89	0.834
57	1.010
91.1 U 99.94 L 0.07	U 0.880 L 0.999
79.8 U 99.95 L 0.06	U 0.868 L 1.000
U 0.780 L 1.00
CPME	106	83	83.7
MTBE	55	52.9	96.5
98.7	0.720
2-methyltetrahydrofuran	80.2	71	89.4
83.7	0.818

^‡ CRC 44th ed. lists azeotropes for acetic acid/water and acetone/water, Lange's 10th ed. as well as numerous web sources indicate no azeotrope for these pairs.

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
with various
82.6	0.874
88.5	1.450

| valign="top" |

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
with various
69.2	0.863
with various
67.6	0.848
69.5
32	0.815
79	0.687
51	0.729
with various
93	1.403
84.2	1.377
73.0	1.197
96.2	1.517
with various other
4.5	0.804
60	0.802
43.0	0.788
2-methyltetrahydrofuran	80.2	74.4	66

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
with various
81.3	0.908
56	0.846
with various
60.5	0.844
31	0.813
with various
87.4	1.342
79.4	1.322
with various other
87.9	0.796
U 0.979 L 1.261
2-methyltetrahydrofuran	80.2	62.7	43
MTBE	55	51.3	68.6

|- | valign="top" |

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
with various solvents
49	0.833
47.5	0.836
88.5	1.437
2-methyltetrahydrofuran	80.2	79.5	99

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
with various
98	0.882
72	0.905
27.5	0.908
65.0	1.024

| valign="top"|

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
with various
75	0.869
40	0.822
with various
66.7	0.838
0.777
with various
82	1.344
with various other
68	0.800
2-methyltetrahydrofuran	80.2	77	82

^‡ CRC and Lange's disagree on this azeotrope, but web source corroborates CRC

|- | valign="top" |

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav

with various

with various

with various other

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
45.0	0.834
37.5	0.853

| valign="top" |

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav

with various

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav

+ ! 2nd Component !! b.p. of comp. (˚C) !! b.p. of mixture (˚C) !! % by weight !! spef. grav
67.0	1.04
80.0	1.268

|}

+ ! component 1 !! b.p. comp. 1 (˚C) !! component 2 !! b.p. comp. 2 (˚C) !!   !! b.p. azeo. (˚C) !! % wt comp. 1 !! % wt comp. 2 !! spec. grav.
acetaldehyde	21.0	diethyl ether	34.6		20.5	76.0	24.0	0.762
acetamide	222.0
acetonitrile	82.0
carbon disulfide	46.2	99.0	0.719
		1.157
83.0	0.877
1.101
carbon tetrachloride	76.8	1.247
		1.500
		1.202
cyclohexane	80.74
tetrahydrofuran	65.6
2-methyltetrahydrofuran	80.2	none	-		-
propylene glycol	188.2

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Ternary azeotropes Tables of various ternary azeotropes (that is azeotropes consisting of three components). Fraction percentages are given by weight.

+ ! 2nd component !! b.p. 2nd comp. (˚C) !! 3rd component !! b.p. 3rd comp. (˚C) !!   !! b.p. azeo. (˚C) !! % wt 1st !! % wt 2nd !! % wt 3rd !! spec. grav
ethanol	77.1		83.2	0.901
	74.1 U 86.0 L 4.8		U 0.866 L 0.892
	92.5 U 1.0 L 95.8		U 0.976 L 1.441
	carbon tetrachloride		86.8	61.8	4.3	9.7
					86.3 U 7.0 L 94.8	U 0.935 L 1.519
	U 0.849 L 0.855
	0.832
	85.0 U 96.5 L 6.0		U 0.672 L 0.833
	U 0.686 L 0.801
n-propanol	97.2
			84 U 0.1 L 88.0	U 0.979 L 1.436
Isopropyl alcohol	82.5		cyclohexane	80.8	64.3	7.5	18.5
					66.1	7.5	21.5
			benzene	80.2	66.5	7.5	18.7
					U 0.855 L 0.966
			0.834
			U 0.845 L 0.930
allyl alcohol	97.0		90 U 95.9 L 0.8	U 0.668 L 0.964
			82.2 U 90.7 L 0.4	U 0.877 L 0.985
			84 U 2.7 L 89.1	U 0.777 L 1.464
benzene	80.1		acetonitrile	82.0	66.0	8.2	68.5
			U 0.858 L 0.992
methyl ethyl ketone	79.6		carbon tetrachloride	76.8	65.7	3.0 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
			U 0.769 L 0.98
chloroform	61.2		methanol	64.65	52.6	4.0 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
			acetone‡	56.5	60.4	4.0	57.6

^‡Saddle azeotrope

+ ! 2nd component !! b.p. 2nd comp. (˚C) !! 3rd component !! b.p. 3rd comp. (˚C) !!   !! b.p. azeo. (˚C) !! % wt 1st !! % wt 2nd !! % wt 3rd !! spec. grav
acetone	56.5	chloroform‡	61.2		57.5	23.0	30.0	47.0
		0.898
methyl acetate	57.1	carbon disulfide	46.2		37.0
		0.73

^‡Saddle azeotrope

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