Triethylene Glycol (TEG)
Triethylene glycol, more typically referred to as TEG, is most typically used in the dehydration of natural gas. In this regard, it is generally preferred to diethylene glycol by virtue of its higher boiling point and lower volatility.
Triethylene glycol is produced as a bi-product to the production of ethylene glycol via the liquid phase hydration of propylene oxide, but this occurs in such low yield that it must also be produced by reaction of diethylene glycol and ethylene oxide. In the United States alone, some 261 million pounds of triethylene glycol are produced annually.
Pure triethylene glycol is a colorless, odorless liquid at room temperature.
| Molecular Weight | 150.175 g/mole |
| Formula | (HOCH2CH2OCH2-)2 |
| CAS # | 112-27-6 |
| Other Synonyms | Ethylene Glycol Dihydroxyethyl Ether Triglycol 2,2’-Ethylenedioxydiethanol Glycol Bis (Hydroxyethyl) Ether |
| Melting Point | 18.83 °F (-7.32 °C) |
| Boiling Point | 551.10 °F (288.39 °C) |
| Density | 9.362 lb/gal (1.1218 gm/cm3) at 70 °F |
| Vapor Pressure | <0.01 mmHg at 70 °F |
| Viscosity | 20.68 cP at 40 °C |
| Thermal Conductivity | 0.113 BTU/hr-ft-F (0.1958 W/m-C) at 40 °C |
| Critical Temperature | 925.50 °F (496.39 °C) |
| Critical Pressure | 24,902 mm Hg (32.77 atm) |
| Critical Volume | 0.0473 ft3/lb (0.0030 m3/kg) |
The information contained herein is correct to the best of our knowledge and is believed to be reliable. However, no guarantee of accuracy is made and the products discussed are sold without warranty, expressed or implied, as to their use and application.