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.

File:LogEthyleneglycolVaporPressure.png
log10 Ethylene glycol vapor pressure. Uses formula: obtained from CHERIC[2]


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" (PDF). Dow Chemical. Unknown parameter |accessdaymonth= ignored (help); Unknown parameter |accessyear= ignored (|access-date= suggested) (help)

Distillation data

Vapor-liquid Equilibrium for Ethylene glycol/Water[3]
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[3]
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

  1. Lange's Handbook of Chemistry, 10th ed. 1669-1674
  2. "Pure Component Properties" (Queriable database). Unknown parameter |accessdaymonth= ignored (help); Text "Chemical Engineering Research Information Center" ignored (help); Unknown parameter |accessyear= ignored (|access-date= suggested) (help)
  3. 3.0 3.1 "Binary Vapor-Liquid Equilibrium Data" (Queriable database). Chemical Engineering Research Information Center. Unknown parameter |accessdaymonth= ignored (help); Unknown parameter |accessyear= ignored (|access-date= suggested) (help)

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

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