PSOLV-044 Triethylene glycol (also known as TEG, triglycol and trigen) is a colourless, viscous, non-volatile liquid with the formula C6H14O4.  It is well known for its hygroscopic quality and its ability to dehumidify fluids.

The main uses for PSOLV-044 Triethylene glycol are based upon its hygroscopic quality. This means that it can absorb moisture from the air through absorption or adsorption. It is used as a dehydrating agent for natural gas pipelines where it removes the water from the gas before being condensed.

PSOLV-044 Triethylene glycol can then be continually reused, although the by-product of benzene needs to be disposed of carefully. This process is useful as it prevents the gas from freezing making the gas easier to transport and manage for end consumers.



PSOLV-044 Triethylene glycol is used by the oil and gas industry to “dehydrate” natural gas. It may also be used to dehydrate other gases, including CO2, H2S, and other oxygenated gases. It is necessary to dry natural gas to a certain point, as humidity in natural gas can cause pipelines to freeze, and create other problems for end users of the natural gas. PSOLV-044 Triethylene glycol is placed into contact with natural gas, and strips the water out of the gas. Triethylene glycol is heated to a high temperature and put through a condensing system, which removes the water as waste and reclaims the TEG for continuous reuse within the system. The waste TEG produced by this process has been found to contain enough benzene to be classified as hazardous waste (benzene concentration greater than 0.5 mg/L).



Appearance : Liquid, colorless to yellow
Density at 25°C : 1,120 kg/m3
Boiling point : 287.8 °C
Freezing point : −7.2 °C
Molar Mass : 150.174 g·mol−1
pH value : 6.5 – 7.5 (100 g/l, H₂O, 20 °C)