5-hydroxy-2,4-decadienoic Acid Delta-lactone

5-hydroxy-2,4-decadienoic acid delta-lactone (CAS Number: 27593-23-3) is a synthetic organic compound belonging to the lactone family of flavor chemicals. Lactones are cyclic esters that naturally occur in many foods but can also be synthesized chemically. This particular compound is characterized by its ten-carbon backbone with a five-membered ring lactone structure and conjugated double bonds, which contribute to its distinctive sensory properties.

This flavoring agent is primarily used in the food industry to create or enhance creamy, buttery, and dairy-like flavor profiles. It is particularly valued in processed cheese products, dairy-based beverages, flavored yogurts, and cream-flavored confectionery items. The compound is deployed in very small concentrations—typically measured in parts per million (ppm)—to achieve the desired sensory effect without overwhelming the product's overall flavor profile. As with most synthetic flavoring agents, its use is restricted to specific food categories and maximum usage levels established by regulatory authorities.

According to available FDA records, there have been no reported adverse events associated with this additive, and no recalls have been issued involving this compound. The absence of reported safety incidents suggests a generally favorable safety record in commercial use. However, it is important to note that the FDA has not granted this substance Generally Recognized as Safe (GRAS) status, which means it has not undergone the comprehensive safety review and approval process that GRAS designation requires.

The safety profile of lactone-type flavoring agents in general has been studied extensively. Most lactones used in food are considered safe when used at typical flavoring levels due to their rapid metabolism and the small quantities employed. The conjugated diene system present in this compound's structure does not appear to raise specific toxicological concerns based on available data, though comprehensive toxicological studies specific to this exact compound may be limited in the public domain.

The regulatory status of this compound varies by jurisdiction. In the United States, while not GRAS-listed, it may be permitted for use under FDA regulations as a synthetic flavoring substance, subject to specific usage limitations and food categories. In the European Union, this substance would need to be evaluated and listed in the Union List of approved flavoring substances to be legally used in foods. Different countries maintain varying requirements for synthetic flavor compound approval, and manufacturers must comply with local regulations in each market where products containing this additive are sold.

Manufacturers using this compound are typically required to maintain documentation demonstrating compliance with applicable regulations and safe use levels, and they must properly label products containing it as required by law.

Publicly available peer-reviewed research specifically focused on 5-hydroxy-2,4-decadienoic acid delta-lactone is limited. Most safety information derives from general lactone toxicology studies and industry safety data submitted to regulatory agencies. The broader category of lactone flavorings has been studied in toxicology literature, with research generally supporting their safety at typical food use levels. Any manufacturer or regulatory body seeking detailed safety information typically relies on proprietary safety data packages, chemical analysis, and metabolism studies submitted as part of the approval process. Additional research or detailed toxicological studies on this specific compound may exist in regulatory files not readily available to the public.