What is (+/-)-trans- And Cis-2-hexenal Glyceryl Acetal?
(+/-)-trans- And Cis-2-hexenal Glyceryl Acetal is a synthetic organic compound classified as a flavoring agent. The chemical structure consists of 2-hexenal (an unsaturated aldehyde with a green, fruity aroma) conjugated with glycerol in an acetal formation. The designation "(+/-)-trans- And Cis-" indicates the compound exists as a mixture of different stereoisomers, which may contribute to its complex flavor profile. With CAS Number 977187-68-0, this compound is registered in the Chemical Abstracts Service database for identification and tracking purposes.
Common Uses
As a flavoring agent, (+/-)-trans- And Cis-2-hexenal Glyceryl Acetal is used in food manufacturing to enhance or impart fruity, green, and fresh sensory characteristics. Such compounds are typically incorporated into processed foods at very low concentrations, measured in parts per million (ppm). Common applications include beverages, confectionery products, dairy products, and other processed foods where flavor enhancement is desired. The glyceryl acetal formation allows for improved stability and controlled flavor release compared to the free aldehyde form.
Safety Assessment
According to FDA records, there are zero reported adverse events associated with this additive. Additionally, no FDA recalls have been linked to this compound. These metrics suggest that if the product has been used in food applications, no safety signals have been detected through post-market surveillance systems.
However, it is important to note that this compound has not received GRAS (Generally Recognized as Safe) status from the FDA. GRAS designation requires either a long history of safe use in food or substantial scientific evidence demonstrating safety. The absence of GRAS status does not necessarily indicate the compound is unsafe; rather, it indicates that formal FDA approval through either the Food Additive Petition process or GRAS notification has not been completed or published. This may reflect limited market use, recent development, or that manufacturers using this ingredient are operating under other regulatory frameworks.
The limited adverse event and recall data suggests this compound either has a minimal safety concern profile or sees limited use in FDA-regulated markets. Like all synthetic flavor compounds, safety assessments typically consider acute and chronic toxicity, potential allergenicity, and metabolic pathways.
Regulatory Status
In the United States, the regulatory pathway for flavor compounds operates under Title 21 CFR Part 182 (GRAS substances) or Part 184 (Direct food substances affirmed as GRAS). Since this additive lacks GRAS status, its legal use in food would typically require either: (1) FDA approval via a Food Additive Petition, (2) qualification under another regulatory category, or (3) compliance with regulations in countries where it may be approved. Manufacturers must verify appropriate regulatory approval before marketing any food containing this ingredient in their target jurisdictions.
International regulatory status may vary. The European Food Safety Authority (EFSA) maintains separate approval processes for flavoring agents under Regulation (EC) No 1334/2008. Approval status in the EU, Canada, Japan, or other regions may differ from U.S. regulations.
Key Studies
Publicly available toxicological or safety data specifically evaluating (+/-)-trans- And Cis-2-hexenal Glyceryl Acetal appears limited in open literature. The lack of published peer-reviewed studies on this specific compound is consistent with its apparent limited market deployment. For compounds seeking regulatory approval, manufacturers typically conduct proprietary safety studies addressing acute toxicity, repeat-dose toxicity, genotoxicity, and allergenicity. These data are submitted to regulatory agencies but may not be publicly available.
Safety assessments for structurally similar compounds and the parent compound 2-hexenal provide some context for understanding flavor aldehyde safety profiles generally. The glyceryl acetal conjugation may alter absorption, metabolism, and toxicity profiles compared to the free aldehyde.