What is 4,5-octanedione?
4,5-octanedione (CAS Number: 5455-24-3) is a synthetic organic compound belonging to the class of diketones. It is a colorless to pale yellow liquid with a characteristic odor profile that includes buttery, creamy, and fruity notes. The compound contains two ketone functional groups positioned at the 4 and 5 carbon positions of an eight-carbon chain, which contributes to its distinctive sensory properties used in flavoring applications.
Common Uses
4,5-octanedione is utilized as a flavoring agent or flavoring adjuvant in the food industry. Its primary application is in creating complex flavor profiles in processed foods, beverages, and flavorings where buttery or creamy notes are desired. Common product categories may include dairy products, baked goods, confectionery, beverages, and savory snack foods. As a flavoring adjuvant, it may also be used in combination with other flavor compounds to enhance or modify overall flavor perception. The compound's ketone structure allows it to contribute both aromatic and taste components to food formulations.
Safety Assessment
According to FDA records, there have been zero reported adverse events associated with 4,5-octanedione and zero recalls linked to this additive. This absence of reported safety incidents suggests that, when used in food applications, the compound has not generated significant consumer health concerns in the United States marketplace.
The compound is not listed on the FDA's GRAS (Generally Recognized As Safe) roster, which means it has not undergone the formal GRAS notification process or been established as safe through FDA regulation. However, the lack of GRAS status does not indicate that the substance is unsafe; rather, it reflects its regulatory classification status. Substances not GRAS may still be used in food under Food Additive Regulations if appropriately approved, or they may be used in flavoring applications under the Food Additive Regulations for synthetic flavoring substances and adjuvants (21 CFR 172.515).
The European Food Safety Authority (EFSA) maintains separate assessments of flavoring substances used in the European Union. The absence of regulatory flags regarding this compound in major food markets suggests it falls within acceptable use parameters for established flavoring applications.
Regulatory Status
4,5-octanedione operates under the FDA's flavoring substance regulations. While not GRAS-listed, it may be permitted for use as a synthetic flavoring agent under 21 CFR Part 172. The regulatory pathway for synthetic flavoring substances allows for their use in food when they meet established safety and purity criteria and are used at levels consistent with good manufacturing practices.
The compound's non-GRAS status reflects only that it has not completed the voluntary GRAS notification process with the FDA, not that it is prohibited or considered unsafe. Many synthetic flavoring agents function under FDA approval without GRAS designation, particularly those with established historical use in flavoring applications.
Key Studies
Limited published peer-reviewed research specifically addresses 4,5-octanedione in isolation. The compound's safety profile is largely supported by its inclusion in regulatory approved flavor ingredient databases and the absence of reported adverse events or recalls in the FDA's food safety surveillance system. Most safety evaluations of diketone compounds focus on occupational exposure risks (particularly in flavoring manufacturing environments) rather than consumer food exposure at typical use levels.
For additional information about this flavoring agent's specifications, permitted use levels, or safety documentation, consultation with the FDA's Color Additives Status List or current flavoring regulations (21 CFR 172.515) is recommended.