What is 2,4-hexadien-1-ol?
2,4-hexadien-1-ol (CAS Number 111-28-4) is an organic compound classified as an unsaturated aliphatic alcohol. It contains a six-carbon chain with two double bonds and a hydroxyl group. The compound exists as a colorless to pale yellow liquid with a characteristic fruity, floral aroma. Its chemical structure makes it a volatile organic compound that contributes distinctive sensory characteristics to food and beverage applications.
Common Uses
2,4-hexadien-1-ol is utilized primarily as a flavoring agent and flavoring adjuvant in the food industry. Its fruity and floral notes make it suitable for applications in beverages, confectionery, baked goods, and flavored dairy products. The compound is valued by flavor chemists for creating complex flavor profiles that enhance sensory appeal. However, its use in the United States is limited due to its regulatory status.
Safety Assessment
Available data on 2,4-hexadien-1-ol shows no reported adverse events associated with its use in food, according to FDA databases. No recalls involving this additive have been documented. The compound demonstrates low acute toxicity in standard laboratory testing protocols. Absorption, distribution, and metabolism studies indicate that the compound is processed through normal detoxification pathways when ingested in small quantities typical of flavoring applications.
Like other unsaturated alcohols used in flavoring, 2,4-hexadien-1-ol undergoes rapid metabolism in the body. The absence of adverse event reports and recall data suggests that exposure through food at typical flavoring concentrations has not produced documented safety concerns. However, the lack of extensive human studies means comprehensive long-term safety data is limited.
Regulatory Status
2,4-hexadien-1-ol has not received FDA approval as a food additive and has not been designated as Generally Recognized as Safe (GRAS). This means it cannot be legally added to food products in the United States without prior FDA approval through the food additive petition process. In the European Union, this compound is not listed on the approved flavoring substances inventory maintained by EFSA (European Food Safety Authority).
The distinction between GRAS status and non-approved status is significant. GRAS substances are recognized through either scientific procedures or industry experience as safe for use at their intended levels. Without GRAS designation or explicit FDA approval, manufacturers cannot legally incorporate this additive into food products sold in the U.S. market.
International regulatory approaches vary. Some countries may permit limited use under different regulatory frameworks, while others maintain similar restrictions. Manufacturers seeking to use this compound would need to pursue formal FDA approval pathways, which require submission of safety data, manufacturing information, and proposed use specifications.
Key Studies
Scientific literature on 2,4-hexadien-1-ol is relatively limited compared to more widely used food additives. Available toxicological studies indicate low acute oral toxicity in animal models. Standard safety testing protocols have been applied, but comprehensive carcinogenicity, reproductive toxicity, and long-term exposure studies specific to this compound are not readily available in public databases.
The compound's behavior as a volatile organic compound means it is quickly eliminated from the body through respiration and metabolism. Its structural classification as an unsaturated alcohol places it in a category generally considered to have low toxicological concern when used at flavoring levels, though individual compounds require assessment.
Research into flavor compounds continues within the scientific community, and periodic re-evaluation of safety data occurs as new studies become available. Manufacturers or researchers seeking current safety information should consult the latest scientific literature and regulatory database updates.