What is (E)-2-Nonenoic Acid?
(E)-2-Nonenoic acid, also known as (E)-2-nonenoic acid or trans-2-nonenoic acid, is an unsaturated nine-carbon fatty acid with a double bond in the trans configuration. Its CAS number is 14812-03-4. This compound belongs to the class of organic acids and is used in the food industry primarily as a flavoring agent and flavor adjuvant. The molecule naturally occurs in trace amounts in certain foods and fermented products, contributing to their characteristic flavor profiles.
Common Uses
(E)-2-Nonenoic acid is employed in the food and beverage industry as a flavoring substance to enhance or modify taste and aroma characteristics. It is typically used in very small concentrations—measured in parts per million—in products such as processed foods, beverages, dairy products, and savory preparations. The acid contributes subtle, slightly pungent flavor notes that can complement other flavor compounds in formulations. As with many flavoring agents, its use is limited to amounts necessary to achieve the desired sensory effect without creating undesirable taste profiles.
Safety Assessment
Based on available FDA data, (E)-2-nonenoic acid has generated zero reported adverse events and zero recalls associated with its use in food products. This safety record suggests that when used as intended in food applications, the compound has not raised significant safety concerns in the U.S. food supply.
As an unsaturated fatty acid, (E)-2-nonenoic acid shares structural similarities with naturally occurring compounds found in foods. The human digestive system is equipped to metabolize fatty acids, suggesting that ingestion of food-grade quantities would likely be processed similarly to other dietary fatty acids.
However, it is important to note that this additive does not currently hold FDA GRAS (Generally Recognized As Safe) status in the United States. GRAS status is a specific regulatory designation reserved for substances that have a long history of safe use or have undergone rigorous safety review. The lack of GRAS status does not necessarily indicate a safety concern; rather, it may reflect limited historical use data, restricted market availability, or that formal safety petitions have not been submitted to the FDA for this particular substance.
Regulatory Status
(E)-2-Nonenoic acid is not listed on the FDA's GRAS inventory, meaning it cannot be added to food under the GRAS exemption. However, it may be permitted under other regulatory pathways, such as food additive petitions or through regional approvals. Regulatory status varies internationally; different jurisdictions may have different determinations regarding the permissibility of this substance in food products.
Manufacturers intending to use this ingredient in the United States should verify current regulatory compliance and may need to ensure it is properly declared on product labels or have appropriate regulatory authorization before incorporation into food products.
Key Studies
Limited published scientific literature is readily available on the specific safety profile of (E)-2-nonenoic acid as a food additive. Most safety information derives from its chemical classification as a fatty acid and from general toxicological principles applied to structurally similar compounds. The absence of reported adverse events and recalls suggests adequate safety margins at current levels of use, though comprehensive third-party toxicological studies specific to this additive are not widely documented in public databases.
Research on structurally related unsaturated fatty acids provides some context for safety assessment, but substance-specific safety data would strengthen confidence in regulatory determinations.