Ethylene glycol (data page)

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This page provides supplementary chemical data on ethylene glycol.

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 SIRI, and follow its directions. MSDS for ethylene glycol is available at Mallinckrodt Baker.

Structure and properties

Structure and properties
Index of refraction, nD	1.4318 at 20°C
Abbe number	?
Dielectric constant, εr	37.4 ε0 at 25 °C
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension	47.7 dyn/cm at 20°C
Viscosity[1]	17.33 mPa·s at 25°C

Thermodynamic properties

Phase behavior
Triple point	256 K (−17 °C), ? Pa
Critical point	720 K (447°C) 8.2 MPa
Std enthalpy change of fusion, ΔfusHo	9.9 kJ/mol
Std entropy change of fusion, ΔfusSo	38.2 J/(mol·K)
Std enthalpy change of vaporization, ΔvapHo	65.6 kJ/mol
Std entropy change of vaporization, ΔvapSo	? J/(mol·K)
Solid properties
Std enthalpy change of formation, ΔfHosolid	? kJ/mol
Standard molar entropy, Sosolid	? J/(mol K)
Heat capacity, cp	? J/(mol K)
Liquid properties
Std enthalpy change of formation, ΔfHoliquid	−460 kJ/mol
Standard molar entropy, Soliquid	166.9 J/(mol·K)
Heat capacity, cp	149.5 J/(mol·K)
Gas properties
Std enthalpy change of formation, ΔfHogas	−394.4 kJ/mol
Standard molar entropy, Sogas	311.8 J/(mol·K)
Heat capacity, cp	78 J/(mol·K) at 25°C

Vapor pressure of liquid

P in mm Hg		1	10	40	100	400	760
T in °C		53.0	92.1	120.0	141.8	178.5	197.3

Table data obtained from CRC Handbook of Chemistry and Physics, 44th ed.

Freezing point of aqueous solutions

% ethylene glycol by volume		5	10	15	20	25	30	35	40	45	50
Freezing point °C		–1.1	–2.2	–3.9	–6.7	–8.9	–12.8	–16.1	–20.6	–26.7	–33.3
Specific gravity d15.6°		1.004	1.006	1.012	1.017	1.020	1.024	1.028	1.032	1.037	1.040

Table obtained from Lange's Handbook of Chemistry, 10th ed. Specific gravity is referenced to water at 15.6°C.

See also Typical Freezing and Boiling Points of Aqueous Solutions of DOWTHERM SR-1 and DOWTHERM-SR4000. Dow Chemical. Retrieved on 13 June 2007.

Distillation data

Vapor-liquid Equilibrium for Ethylene glycol/Water[1] P = 760 mmHg BP Temp. °C  % by mole water liquid vapor 110.00 79.8 99.3 116.40 61.3 98.5 124.30 55.9 97.7 124.50 55.3 97.6 126.00 48.2 97.1 128.10 42.6 96.3 129.50 41.1 96.2 130.50 38.8 95.5 131.20 36.5 95.2 135.20 28.9 92.6 136.00 28.3 92.4 138.00 24.1 90.9 142.50 21.6 88.7 149.00 17.8 85.2 158.10 12.9 77.6 167.40 10.2 70.6 178.60 6.5 56.3 184.20 3.4 37.9

Vapor-liquid Equilibrium for Ethylene glycol/Methanol[1] P = 760 mmHg BP Temp. °C  % by mole methanol liquid vapor 66.70 93.0 99.9 73.20 82.1 99.8 79.60 66.4 99.7 84.70 53.0 99.3 90.20 45.7 99.0 93.80 40.6 98.5 101.40 36.3 97.9 102.70 35.6 97.5 104.90 32.2 96.7 105.10 22.7 94.6 109.90 21.2 93.3 113.00 19.5 92.3 121.50 13.7 86.4 149.60 10.3 74.6 157.50 4.6 51.5 166.30 3.6 42.0 175.20 2.5 30.4 183.50 1.4 18.1 189.10 0.5 6.8

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

References

• NIST Standard Reference Database.

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

Disclaimer applies.

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