Used primarily as an antifreeze agent in automotive cooling systems, it prevents engine freezing in winter and overheating in summer by lowering the freezing point and raising the boiling point of coolant mixtures. It is also a key raw material in the production of polyester fibers and resins, especially polyethylene terephthalate (PET), which is used to make plastic bottles and packaging. In the industrial sector, it serves as a deicing fluid for aircraft and runways. Additionally, it is employed in heat transfer systems in HVAC units and as a solvent in paints, inks, and some industrial processes. Due to its toxicity, handling requires care to avoid ingestion.