Ethylene glycol is widely used as a coolant and antifreeze in automotive engines and HVAC systems due to its ability to lower the freezing point and raise the boiling point of water. It is also utilized in the manufacture of polyester fibers and resins, which are essential in producing textiles, packaging, and plastic bottles. Additionally, it serves as a key ingredient in deicing fluids for aircraft, ensuring safe operations in cold weather. In the chemical industry, it acts as a solvent and a precursor in the synthesis of various compounds, including polyethylene terephthalate (PET). Its hygroscopic properties make it useful in the production of inks, adhesives, and coatings.