Ethylene glycol is a colourless, odourless, viscous, hygroscopic sweet-tasting liquid. It is very soluble in water, ethyl alcohol, ethers and markedly reduces the freezing point of water.
Its applications are as an intermediate in the production of polyesters, mainly polyester fibres and polyethylene terephthalate (PET) bottle resins, and as an automotive antifreeze.
There are three grades of ethylene glycol; fibre grade, industrial grade and antifreeze grade.
Minor applications include deicing fluids and surface coatings, and as an ingredient in photographic developing solutions, hydraulic brake fluids, some unsaturated polyester resins (UPR), and inks.
Ethylene glycol can also be used to make glycol ethers.