Physical Properties of Ethylene Glycol

Scientific Common
Autoignition Temperature 398°C @ 1013.25 hPa 748°F @ 760mm Hg
Critical Pressure 8,200 kPa 61,505 mm Hg
Critical Specific Volume 0.191 L/gmol 3.06 ft3/lbmol
Critical Temperature 446.85°C 836.33°F
Dielectric Constant at 25°C 37.7 37.7
Electrical Conductivity at 20°C 1.07 x 10-6 mhos/cm 1.07 micromhos/cm
Evaporation Rate (Butyl Acetate = 1) 0.01 0.01
Flash Point, Closed Cup 111°C @ 1013.25 hPa 231.8°F @ 760 mm Hg
Heat of Combustion at 25°C -1,053 kJ/gmol -7,297 Btu/lb
Heat of Formation at 25°C -460 kJ/gmol -3,188 Btu/lb
Heat of Fusion 9.96 kJ/gmol 69 Btu/lb
Heat of Vaporization at 1 atm 53.2 kJ/gmol 369 Btu/lb
Molecular Weight 62.07 g/mol 62.07 g/mol
Normal Boiling Point 197.4°C @ 1013.25 hPa 387°F @ 760 mm Hg
Δ BP/Δ P (750 to 770 mm Hg) 0.337°C/kPa 0.045°C/mm Hg
Normal Freezing Point -11.2°C 11.8°F
Onset of Initial Decomposition 240°C 464°F
Refractive Index, nD, at 25°C 1.4306 1.4306
Solubility in Water at 20°C 100 wt% 100 wt%
Solubility of Water in EG at 20°C 100 wt% 100 wt%
Specific Gravity (20/20°C) 1.1153 1.1153
Δ Specific Gravity/Δ T(10 to 40°C) 0.00070 per °C 0.00039 per °F
Surface Tension at 25°C 48.0 mN/m 48.0 dynes/cm
Vapor Density (air = 1) 2.1 2.1
Vapor Pressure at 20°C 0.067 hPa 0.05 mm Hg
Dynamic Viscosity at 20°C 19.83 mPa S 19.83 cP


Note: These properties are laboratory results on pure compounds or typical of the product, but should not be confused with, or regarded as, specifications.