ε-Caprolactone is a cyclic ester that is commonly used in the production of biodegradable polymers. It is a colorless liquid with a sweet odor and is primarily utilized in the synthesis of polycaprolactone, a versatile polymer known for its flexibility and biocompatibility. This compound is produced through the ring-opening polymerization process, which allows it to form long chains of repeating units. Due to its properties, ε-caprolactone finds applications in various fields, including medical devices, adhesives, and coatings, making it an important material in both industrial and consumer products.