Trans-2-decenol

Trans-2-decenol (CAS Number: 22104-80-9) is an unsaturated fatty alcohol belonging to the class of aliphatic alcohols. It exists as a natural compound found in various plant sources and fermented foods. The molecule is characterized by a ten-carbon chain with a double bond in the trans configuration at the second carbon position, giving it distinct sensory properties valued in flavor chemistry.

Trans-2-decenol is employed as a flavoring agent and flavor adjuvant in the food industry. Its primary function is to contribute to the overall flavor profile of food and beverage products, particularly in applications where fruity, waxy, or slightly fatty notes are desired. It may be used in very small quantities—typical of most flavor compounds—where even trace amounts can significantly impact product taste. Applications may include baked goods, beverages, dairy products, and confectionery items, though specific product use is limited due to its non-GRAS status in the United States.

Trans-2-decenol has not been formally evaluated and approved by the FDA under the GRAS (Generally Recognized As Safe) program. This designation does not inherently indicate a safety concern but rather reflects that a formal safety petition or GRAS affirmation has not been submitted or granted. The substance has generated zero adverse event reports in the FDA's adverse event tracking system and has been associated with zero product recalls, suggesting no documented safety incidents from consumer exposure.

General toxicological data on structurally similar fatty alcohols indicates low acute toxicity when ingested in typical food-use quantities. Fatty alcohols of this type are generally poorly absorbed in the gastrointestinal tract and are largely eliminated without significant bioaccumulation. However, comprehensive toxicological studies specifically evaluating trans-2-decenol's safety profile have not been extensively published in peer-reviewed literature.

In the United States, trans-2-decenol does not have GRAS status under FDA regulations (21 CFR Part 182, 184, or 186). This means it cannot be legally used as a food additive in conventional foods without specific FDA approval or a successful GRAS petition. Its use may be permitted in certain jurisdictions outside the United States, but regulatory authorization varies by country and region.

The European Food Safety Authority (EFSA) maintains specifications for flavoring compounds used in the EU, though trans-2-decenol's approval status within European frameworks should be verified against current EFSA guidelines and national regulations. Manufacturers seeking to use this compound in food products must comply with all applicable regulations in their target markets.

Limited peer-reviewed scientific literature exists specifically documenting trans-2-decenol's safety and sensory properties. Research on structurally similar compounds—other unsaturated fatty alcohols and aliphatic alcohols—suggests generally favorable safety profiles when used in food at appropriate levels. Any manufacturer considering use of trans-2-decenol would need to conduct or reference adequate toxicological data to support a safety petition to regulatory authorities.

The absence of adverse events and recalls in FDA databases provides reassurance regarding any acute safety incidents, but does not substitute for formal safety evaluation and approval. Prospective users should consult current regulatory guidance and consider commissioning safety studies if regulatory approval is sought.