2,4-undecadienal

2,4-undecadienal (CAS Number: 13162-46-4) is a synthetic organic compound belonging to the aldehyde family of flavor compounds. It is characterized by an 11-carbon chain with two conjugated double bonds and a terminal aldehyde functional group. The compound is primarily used in the food industry as a flavoring agent to create savory, meaty, and umami-like taste profiles in various food formulations.

2,4-undecadienal is employed in the food industry as a flavor component in processed foods, meat analogs, savory snack seasonings, and ready-to-eat meal preparations. It contributes to the development of complex, savory notes that enhance the perceived depth and richness of food products. The compound is used in very small quantities—typically measured in parts per million (ppm)—as is standard practice with synthetic flavor compounds. It may be utilized alone or as part of a broader flavoring blend to achieve desired sensory characteristics in commercial food applications.

While 2,4-undecadienal is not officially recognized as Generally Recognized as Safe (GRAS) by the FDA, the compound has accumulated a safety record with no reported adverse events or product recalls associated with its use. The absence of adverse event reports does not constitute formal FDA approval but indicates that the compound has not generated consumer health concerns in practical use. Like most synthetic flavor compounds used at low concentrations in food, the actual exposure levels from food consumption are typically well below levels that would present toxicological concern.

The safety evaluation of flavor compounds generally considers factors including: chemical structure, metabolic fate in the human body, intended use levels, dietary exposure estimates, and any available toxicological data. Aldehyde-based flavor compounds are common in nature and in commercial flavorings, and many have undergone safety assessment by regulatory bodies and scientific panels. The International Organization of the Flavoring Industry (IOFI) and similar bodies provide guidance on safe levels of use for such compounds.

2,4-undecadienal does not hold GRAS status with the FDA, meaning it has not undergone the formal GRAS notification process or been formally determined to be safe for its intended use. However, this designation does not necessarily indicate unsafe status; rather, it reflects that formal FDA affirmation has not been completed. In the European Union, flavor compounds are regulated under the Flavoring Regulations, and their safety is evaluated by the European Food Safety Authority (EFSA) before approval for use.

Manufacturers and suppliers of this compound typically operate under the understanding that flavoring ingredients must meet food safety standards and be used at levels consistent with good manufacturing practice. The regulatory pathway for approval may vary by country and region, and interested parties should consult with regulatory authorities in their jurisdiction regarding current permissible use status.

Limited published peer-reviewed literature specifically addresses 2,4-undecadienal in isolation. Safety assessments of similar aldehyde-based flavor compounds have been conducted by the Flavor and Extract Manufacturers Association (FEMA) Expert Panel and reviewed by scientific bodies such as the EFSA. These evaluations typically assess the structural class of the compound, known metabolism, and potential for bioaccumulation or toxicity. General toxicological data on structurally similar C11 aldehydes and conjugated diene compounds provide a framework for understanding the safety profile of this particular additive.

For current, detailed safety information, manufacturers and regulatory professionals should consult technical datasheets, Material Safety Data Sheets (MSDS), and regulatory databases maintained by relevant authorities.