1,2-Ethanediol

Formula: C₂H₆O₂
Molecular weight: 62.0678
IUPAC Standard InChI: InChI=1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2
IUPAC Standard InChIKey: LYCAIKOWRPUZTN-UHFFFAOYSA-N
CAS Registry Number: 107-21-1
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript.
Species with the same structure:
- Pluronic f-68
Other names: Ethylene glycol; Ethylene alcohol; Glycol; Glycol alcohol; Lutrol 9; Macrogol 400 BPC; Monoethylene glycol; Ramp; Tescol; 1,2-Dihydroxyethane; 2-Hydroxyethanol; HOCH2CH2OH; Aethylenglykol; Ethane-1,2-diol; Fridex; MEG 100; 1,2-Ethandiol; Ucar 17; Dowtherm SR 1; Norkool; Zerex; Ilexan E; 1,2-Ethylene glycol; 146AR; Ethylene dihydrate; NSC 93876; Union Carbide XL 54 Type I De-icing Fluid; Dihydroxyethane; Ethanediol; Ethylene gycol; Glygen; Athylenglykol; M.e.g.; Aliphatic diol
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Condensed phase thermochemistry data

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Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_liquid	-460.0 ± 2.8	kJ/mol	Ccr	Knauth and Sabbah, 1990	see Knauth and Sabbah, 1989; ALS
Δ_fH°_liquid	-455.6 ± 0.8	kJ/mol	Ccb	Gardner and Hussain, 1972	ALS
Δ_fH°_liquid	-455.85	kJ/mol	Ccb	McClaine, 1947	ALS
Δ_fH°_liquid	-454.9 ± 0.3	kJ/mol	Ccb	Parks, West, et al., 1946	ALS
Δ_fH°_liquid	-453.1 ± 1.2	kJ/mol	Ccb	Moureu and Dode, 1937	Reanalyzed by Cox and Pilcher, 1970, Original value = -452.3 kJ/mol; ALS
Quantity	Value	Units	Method	Reference	Comment
Δ_cH°_liquid	-1191. ± 10.	kJ/mol	AVG	N/A	Average of 7 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
S°_liquid	166.9	J/mol*K	N/A	Parks, Kelley, et al., 1929	Extrapolation below 90 K, 8.2 cal/mol*K. Revision of previous data.; DH
S°_liquid	179.5	J/mol*K	N/A	Parks and Kelley, 1925	Extrapolation below 90 K, 11.46 cal/mol*K.; DH

Constant pressure heat capacity of liquid

C_p,liquid (J/mol*K)	Temperature (K)	Reference	Comment
149.8	298.	Zaripov, 1982	T = 298, 323, 363 K.; DH
149.3	298.	Stephens and Tamplin, 1979	T = 273 to 493 K.; DH
149.6	298.15	Murthy and Subrahmanyam, 1977	DH
145.2	303.	Kawaizumi, Otake, et al., 1972	DH
150.6	301.2	Paz Andrade, Paz, et al., 1970	T = 28, 40°C.; DH
150.33	298.15	Nikolaev and Rabinovich, 1967	T = 80 to 300 K.; DH
147.3	298.	Tungusov and Mishchenko, 1965	DH
148.87	298.	Rabinovich and Nikolaev, 1962	T = 10 to 55°C.; DH
145.6	293.4	Neiman and Kurlyankin, 1932	T = 20.2 to 78.4°C. Value is unsmoothed experimental datum.; DH
149.4	293.0	Parks and Kelley, 1925	T = 88 to 293 K. Value is unsmoothed experimental datum.; DH

References

Go To: Top, Condensed phase thermochemistry data, Notes

Knauth and Sabbah, 1990
Knauth, P.; Sabbah, R., Energetics of intra- and intermolecular bonds in ω-alkanediols (II) Thermochemical study of 1,2-ethanediol, 1,3-propanediol, 1,4-butanediol, and 1,5-pentanediol at 298.15K, Struct. Chem., 1990, 1, 43-46. [all data]

Knauth and Sabbah, 1989
Knauth, P.; Sabbah, R., Combustion calorimetry on milligram samples of liquid substances with a CRMT rocking bomb calorimeter. Application to the study of ω-alkanediol at 298.15 K, J. Chem. Thermodyn., 1989, 21, 203-210. [all data]

Gardner and Hussain, 1972
Gardner, P.J.; Hussain, K.S., The standard enthalpies of formation of some aliphatic diols, J. Chem. Thermodyn., 1972, 4, 819-827. [all data]

McClaine, 1947
McClaine, L.A., Thermodynamic data for some compounds containing carbon, hydrogen and oxygen, Ph.D. Thesis for Stanford University, 1947, 1-57. [all data]

Parks, West, et al., 1946
Parks, G.S.; West, T.J.; Naylor, B.F.; Fujii, P.S.; McClaine, L.A., Thermal data on organic compounds. XXIII. Modern combustion data for fourteen hydrocarbons and five polyhydroxy alcohols, J. Am. Chem. Soc., 1946, 68, 2524-2527. [all data]

Moureu and Dode, 1937
Moureu, H.; Dode, M., Chaleurs de formation de l'oxyde d'ethylene, de l'ethanediol et de quelques homologues, Bull. Soc. Chim. France, 1937, 4, 637-647. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Parks, Kelley, et al., 1929
Parks, G.S.; Kelley, K.K.; Huffman, H.M., Thermal data on organic compounds. V. A revision of the entropies and free energies of nineteen organic compounds, J. Am. Chem. Soc., 1929, 51, 1969-1973. [all data]

Parks and Kelley, 1925
Parks, G.S.; Kelley, K.K., Thermal data on organic compounds. II. The heat capacities of five organic compounds. The entropies and free energies of some homologous series of aliphatic compounds, J. Am. Chem. Soc., 1925, 47, 2089-2097. [all data]

Zaripov, 1982
Zaripov, Z.I., Experimental study of the isobaric heat capacity of liquid organic compounds with molecular weights of up to 4000 a.e.m., 1982, Teplomassoobmen Teplofiz. [all data]

Stephens and Tamplin, 1979
Stephens, M.A.; Tamplin, W.S., Saturated liquid specific heats of ethylene glycol homologues, J. Chem. Eng. Data, 1979, 24, 81-82. [all data]

Murthy and Subrahmanyam, 1977
Murthy, N.M.; Subrahmanyam, S.V., Behaviour of excess heat capacity of aqueous non-electrolytes, Indian J. Pure Appl. Phys., 1977, 15, 485-489. [all data]

Kawaizumi, Otake, et al., 1972
Kawaizumi, F.; Otake, T.; Nomura, H.; Miyahara, Y., Heat capacities of aqueous solutions of ethylene glycol, propylene glycol and 1,3-butanediol, Nippon Kagaku. Kaishi, 1972, 1972, 1733-1776. [all data]

Paz Andrade, Paz, et al., 1970
Paz Andrade, M.I.; Paz, J.M.; Recacho, E., Contribucion a la microcalorimetria de los calores especificos de solidos y liquidos, An. Quim., 1970, 66, 961-967. [all data]

Nikolaev and Rabinovich, 1967
Nikolaev, P.N.; Rabinovich, I.B., Heat capacity of ethylene glycol and ethylene deuteroglycol in the temperature range 80-300K, Zhur. Fiz. Khim., 1967, 41, 2191-2194. [all data]

Tungusov and Mishchenko, 1965
Tungusov, V.P.; Mishchenko, K.P., Specific heat of pure ethylene glycol and solution of NaI and KI in ethylene glycol at 25°C, Zhur. Fiz. Khim., 1965, 39, 2968-2972. [all data]

Rabinovich and Nikolaev, 1962
Rabinovich, I.B.; Nikolaev, P.N., Isotopic effect in the specific heat of some deutero compounds, Dokl. Akad. Nauk, 1962, SSSR 142, 1335-1338. [all data]

Neiman and Kurlyankin, 1932
Neiman, M.B.; Kurlyankin, I.A., Thermodynamic studies of solutions. II. Study of the thermodynamics of aqueous solutions of ethylene glycol at different temperatures, Zhur. Obshch. Khim., 1932, 2, 318-321. [all data]

Notes

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Symbols used in this document:

C_p,liquid	Constant pressure heat capacity of liquid
S°_liquid	Entropy of liquid at standard conditions
Δ_cH°_liquid	Enthalpy of combustion of liquid at standard conditions
Δ_fH°_liquid	Enthalpy of formation of liquid at standard conditions

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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