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

Template:Chembox header | 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

Template:Chembox header | 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)
Template:Chembox header | Solid properties
Std enthalpy change
of formation, ΔfHosolid 		? kJ/mol
Standard molar entropy,
Sosolid 		? J/(mol K)
Heat capacity, cp ? J/(mol K)
Template:Chembox header | 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)
Template:Chembox header | 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

Template:Chembox header | P in mm Hg 1 10 40 100 400 760
Template:Chembox header | 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: <math>\scriptstyle \log_e P_{mmHg} = </math> <math>\scriptstyle \log_e (\frac {760} {101.325}) -25.99771 \log_e (T+273.15) - \frac {14768.57} {T+273.15} + 191.4250 + 2.062331 \times 10^{-05} (T+273.15)^2)</math> obtained from CHERIC[2]


Freezing point of aqueous solutions

Template:Chembox header | % ethylene glycol
by volume 		5 10 15 20 25 30 35 40 45 50
Template:Chembox header | Freezing point
°C 		–1.1 –2.2 –3.9 –6.7 –8.9 –12.8 –16.1 –20.6 –26.7 –33.3
Template:Chembox header | 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

Template:Chembox header | UV-Vis
λmax ? nm
Extinction coefficient, ε ?
Template:Chembox header | IR
Major absorption bands ? cm−1
Template:Chembox header | NMR
Proton NMR  
Carbon-13 NMR  
Other NMR data  
Template:Chembox header | 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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