Physical Properties of Ethylene Glycol
| Scientific | Common | |
|---|---|---|
| Autoignition Temperature | 427°C | 801°F |
| 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 (Pensky-Martens Closed Cup ASTM D93) |
126.7°C | 260°F |
| Flash Point, Open Cup (Cleveland Open Cup ASTM D92) |
137.8°C | 280°F |
| 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 | 197.1°C | 386.8°F |
| Δ BP/Δ P (750 to 770 mm Hg) | 0.337°C/kPa | 0.045°C/mm Hg |
| Normal Freezing Point | -13°C | 8.6°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 | 0.0075 kPa | 0.06 mm Hg |