Lactide is a cyclic diester derived from lactic acid, which is produced through the fermentation of carbohydrates. It is a colorless, crystalline compound that plays a crucial role in the production of biodegradable polymers, particularly polylactic acid (PLA). PLA is widely used in packaging, disposable items, and medical applications due to its eco-friendly properties. The process of creating lactide involves the condensation of two molecules of lactic acid, resulting in a ring structure. This compound can be polymerized to form PLA, which is known for its strength and versatility. As a renewable resource, lactide contributes to sustainable materials that reduce reliance on fossil fuels.