4-((2-methyl-3-furyl)thio)-5-nonanone

4-((2-methyl-3-furyl)thio)-5-nonanone, identified by CAS number 61295-50-9, is a synthetic organic compound belonging to the category of flavoring agents. Its chemical structure contains both a furan ring (a five-membered aromatic ring with oxygen) and a sulfur atom, which are characteristic features of compounds that produce savory and meaty flavor notes. The compound exists as a liquid or semi-solid at room temperature and is used in extremely small quantities in food applications.

This flavoring agent is primarily used in the food industry to enhance savory and umami characteristics in processed foods. Common applications include meat flavorings, savory snacks, soups, broths, gravies, and prepared dishes where a cooked meat or roasted character is desired. Like most synthetic flavoring compounds, it would be used at very low concentrations—typically measured in parts per million—to achieve the desired sensory effect without overwhelming other flavor components.

The compound is part of a broader palette of sulfur-containing flavor molecules that the food industry uses to create complex flavor profiles that would be difficult or economically impractical to achieve through natural ingredients alone.

According to FDA records, there have been zero reported adverse events associated with this additive and zero recalls involving its use. This lack of adverse event reporting suggests either minimal exposure levels in the food supply or an absence of safety concerns at current usage levels.

However, it is important to note that the FDA has not granted this compound GRAS (Generally Recognized as Safe) status. GRAS status requires either a long history of safe use in food before 1958, or completion of the GRAS notification process demonstrating safety through scientific evidence. The absence of GRAS status does not automatically indicate that a substance is unsafe; rather, it indicates that formal FDA authorization through the food additive petition process may be required for its use, or that it may be used under specific regulatory provisions in certain jurisdictions.

The compound's chemical structure—containing both a furan ring and a sulfur atom—places it within a well-studied class of flavor compounds. Related compounds with similar structural features have been evaluated for safety, and many furan-derived and thio-containing flavor molecules have established safety profiles at their intended use levels.

The regulatory status of 4-((2-methyl-3-furyl)thio)-5-nonanone varies by jurisdiction. In the United States, while not GRAS-listed, it may be used as a food additive subject to FDA regulations regarding flavor ingredients. The European Union maintains its own approval process for flavor substances, with evaluations conducted by the EFSA (European Food Safety Authority).

Any manufacturer intending to use this compound in food products should verify its regulatory status in their specific market, as requirements differ between countries and regions. Some jurisdictions may require formal approval, while others may permit its use under flavor regulations.

Limited published research specifically addresses this individual compound. Safety evaluations for synthetic flavor compounds typically rely on structural analogs, toxicological testing protocols, and the established safety of related compounds with similar chemical classes. The lack of adverse event reports in FDA databases suggests that if this compound is used in the food supply, it has not raised safety flags at current exposure levels.

For manufacturers and regulatory bodies seeking more detailed safety information, consultation with specialized flavor safety databases and toxicological literature on furan derivatives and organosulfur flavor compounds would be appropriate.