What is Rosemary Oil?
Rosemary oil is an essential oil derived from the leaves of Rosmarinus officinalis L., a perennial woody shrub native to the Mediterranean region. The oil is obtained through steam distillation or solvent extraction of the plant material. It contains numerous volatile compounds including 1,8-cineole, camphor, α-pinene, and carnosic acid. The CAS number 8000-25-7 identifies this substance in chemical databases. As a natural product, rosemary oil has been used in culinary applications for centuries and is distinct from rosemary extract, though both come from the same plant source.
Common Uses
Rosemary oil is utilized primarily as a flavoring agent in food products, contributing distinctive herbal and slightly minty notes. Common applications include seasonings, processed meats, baked goods, beverages, and condiments. In addition to its flavoring function, rosemary oil is valued for its antioxidant properties, which help preserve the sensory and nutritional qualities of foods by inhibiting lipid oxidation. This dual functionality makes it attractive to food manufacturers seeking natural alternatives to synthetic preservatives. The oil is typically used in very small quantities—measured in parts per million—to achieve desired flavor and preservation effects.