Lemon oil is a cold-pressed essential oil derived from the peel of Citrus limon, consisting primarily of monoterpenes with d-limonene comprising 60-80% of the composition, along with beta-pinene, gamma-terpinene, and citral. It exhibits a characteristic fresh citrus aroma and is widely used in food flavoring, perfumery, and aromatherapy. The oil is a pale yellow to greenish liquid with a density of approximately 0.85 g/mL. It demonstrates antioxidant and antimicrobial properties due to its terpene content. As a mixture rather than a single compound, its properties reflect the dominant limonene fraction. Lemon oil is recognized as GRAS by the FDA for food use and is employed in beverages, confectionery, and cleaning products. Its volatility allows for rapid evaporation, contributing to its use in fragrances.