Triethylene Glycol

Definition - What does Triethylene Glycol mean?

Triethylene glycol is a chemical compound with the chemical formula C6H14O4 that is categorized as an alcohol. At room temperature it is a liquid. It is clear, has a mild odor and is not extremely viscous. Triethylene glycol is soluble in water.

Triethylene glycol can cause material corrosion because of its acidic nature. Care should be taken to mitigate corrosion concerns when using triethylene glycol through appropriate material selection, use of coatings and use of corrosion inhibitors. High temperature environments can see high rates of corrosion with triethylene glycol.

Corrosionpedia explains Triethylene Glycol

The manufacturing processes of certain types of polymers frequently use triethylene glycol as a plasticizer, which means it reduces brittleness and increases ductility when added to certain types of resins.

One of the most popular materials triethylene glycol is used for as a plasticizer is vinyl polymers. Materials such as polyvinyl chloride (PVC) and polyvinyl butyral are commonly made using triethylene glycol. This makes triethylene glycol a key ingredient in items such as automotive parts and coatings.

Triethylene glycol has the following properties:

  • Specific gravity: 1.125 @ 20°C (68°F)
  • Melting point: -7°C (19°F)
  • Boiling point: 285°C (545°F)
  • Molecular weight: 150.17 g/mol
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