What is (E,E)-2,4-octadien-1-ol?
(E,E)-2,4-octadien-1-ol, identified by CAS Number 18409-20-6, is an eight-carbon organic compound belonging to the class of unsaturated alcohols. The compound's chemical structure features two conjugated double bonds in the E (trans) configuration, which influences its sensory properties. This natural flavoring compound occurs in small quantities in various fruits and botanical sources, contributing to their characteristic aroma profiles.
Common Uses
This additive functions as a flavoring agent and sensory adjuvant in the food industry. It is primarily employed in the formulation of:
- Alcoholic and non-alcoholic beverages
- Confectionery and candy products
- Baked goods and bakery items
- Dairy products and desserts
- Savory snack foods
The compound is valued for its ability to impart fruity, melon-like, and slightly floral notes that enhance overall flavor complexity. It typically appears in formulations at very low concentrations (parts per million range), where its sensory impact is most effective.
Safety Assessment
No adverse events related to (E,E)-2,4-octadien-1-ol have been reported to the FDA, and no product recalls involving this additive have been documented. The compound has not accumulated a history of safety concerns in consumer use.
As an organic compound of relatively simple structure, (E,E)-2,4-octadien-1-ol is not expected to exhibit toxicological concern at the levels used in food flavoring applications. The use concentrations in food products are typically several orders of magnitude below threshold levels that would be relevant for regulatory concern. Standard food industry practices limit flavoring agent use to the minimum effective amount required to achieve desired sensory outcomes.
The compound's status as a naturally-occurring substance in fruits and other foods suggests a baseline familiarity in human diets, though the cumulative exposure from all sources remains limited due to low usage levels.
Regulatory Status
(E,E)-2,4-octadien-1-ol is not listed on the FDA's Generally Recognized as Safe (GRAS) inventory. This classification does not indicate a safety concern; rather, it reflects that the additive may not have undergone formal GRAS determination procedures with the FDA. Some flavoring agents operate under the Food Chemical Codex or through the International Organization of the Flavoring Industry (IOFI) frameworks without separate FDA GRAS listings.
The additive is approved for use in the European Union as a flavoring substance under Regulation (EC) No. 1334/2008, which governs flavoring ingredients in food. This European approval indicates that the compound meets safety standards established by the European Food Safety Authority (EFSA) for use in food applications.
Manufacturers and food companies using this ingredient are responsible for ensuring their overall product formulations comply with FDA regulations and labeling requirements. When listed on ingredient labels, it may appear as "natural flavor" or "flavoring" depending on its derivation and formulation context.
Key Studies
Limited published literature exists specifically on (E,E)-2,4-octadien-1-ol in isolation. However, its inclusion in approved flavoring substance lists in the EU is based on safety evaluation frameworks that assess mutagenic, carcinogenic, and reproductive potential. The compound's structural classification and metabolic fate suggest it would be handled through standard Phase I and Phase II biotransformation pathways.
The absence of reported adverse events and recalls, combined with its long history of use in food flavoring applications and approval in multiple regulatory jurisdictions, supports a favorable safety profile at current levels of use. Ongoing industry standards for flavoring agent selection continue to prioritize safety margins and sensory efficacy in product formulation.