Used as a key intermediate in the production of polymers such as polybutylene terephthalate (PBT) and polyurethanes, which are widely applied in automotive components, electrical and electronic devices, and industrial plastics. Also serves as a solvent and in the synthesis of elastic fibers like spandex for textiles. Employed in the manufacture of biodegradable plastics and as a precursor in the production of gamma-butyrolactone (GBL) and other specialty chemicals. Additionally, utilized in coatings, adhesives, and sealants due to its reactivity and ability to enhance flexibility and durability.