Triethylene glycol

Triethylene glycol (TEG) is a homologue of diethylene glycol.

Molecular formula: C₆H₁₄O₄
Molecular weight: 150.17
CAS number: 112-27-6
EINECS number: 203-953-2
Structural formula: HO(CH₂CH₂O)₂CH₂CH₂OH
Physical and chemical properties:

It is a colorless, odorless, hygroscopic viscous liquid with a relative density of 1.125. It is soluble in water and ethanol, but insoluble in benzene, toluene, and gasoline.

Uses:

It is mainly used as a wetting agent and solvent intermediate, less commonly in polyurethanes, but can also be used as a polyurethane chain extender and a raw material for oligomeric polyols.