1. Coolant and heat-transfer agent: The major use of ethylene glycol is as an antifreeze agent in the coolant in for example, automobiles and air-conditioning systems.
2. Anti-freeze: Used as a de-icing fluid for windshields and aircraft, as an antifreeze in automobile engines.
3. Precursor to polymers: In the plastic industry, ethylene glycol is an important precursor to polyester fibers and resins. Polyethylene terephthalate, used to make plastic bottles for soft drinks, is prepared from ethylene glycol.
4. Dehydrating agent: Used in the natural gas industry to remove water vapor from natural gas before further processing.
5. Hydrate inhibition: Used to inhibit the formation of natural gas clathrates (hydrates).
