trans-2-Dodecenal, identified by CAS: 20407-84-5, is an unsaturated aliphatic aldehyde known for its distinct and powerful organoleptic properties. It occurs naturally in various botanical sources, most notably in coriander leaves (cilantro) and Eryngium foetidum, where it serves as a primary contributor to the characteristic pungent, green, and soapy aroma. In its isolated commercial form, it appears as a clear to slightly yellowish liquid that is highly prized in the flavor and fragrance industries for its potency and specific sensory profile.
This chemical compound is widely utilized as a flavoring agent due to its ability to impart a fresh, fatty, and citrus-like character to a variety of food products. Its chemical structure, featuring a trans-configured double bond at the C2 position, provides a reactive nature suitable for specialized organic syntheses. It is particularly effective at extremely low concentrations, providing a realistic herbal and earthy note that is difficult to replicate with other synthetic aldehydes.