What is Trans-4,8-dimethyl-3,7-nonadien-2-one?
Trans-4,8-dimethyl-3,7-nonadien-2-one (CAS Number 27539-94-2) is a synthetic flavoring compound belonging to the class of volatile organic compounds. It is a colorless to pale yellow liquid with a molecular structure characterized by conjugated double bonds and methyl substituents. The compound is structurally related to natural terpene-derived flavors and is designed to mimic fruity, floral, and aromatic taste profiles found in various fruits and botanicals.
Common Uses
This flavoring agent is utilized in the food and beverage industry to enhance or modify the taste of consumer products. Common applications include:
- Soft drinks and carbonated beverages
- Flavored waters and non-alcoholic drinks
- Confectionery items including hard candies and chewing gum
- Baked goods and desserts
- Dairy products including yogurts and flavored milk
- Frozen desserts
The compound provides fruity and floral notes that appeal to consumer preferences for complex flavor profiles. Typical usage levels are very low, measured in parts per million (ppm), as flavoring agents require only minimal concentrations to achieve desired organoleptic effects.
Safety Assessment
Trans-4,8-dimethyl-3,7-nonadien-2-one has not been formally evaluated by the FDA as a GRAS (Generally Recognized as Safe) substance. However, no adverse events have been reported to the FDA regarding this additive, and it does not appear in FDA recall databases. The absence of reported safety incidents suggests a benign safety profile in current food applications.
As a synthetic flavoring agent used at extremely low concentrations, the compound presents minimal dietary exposure risk. The volatile nature of many flavoring compounds means they may undergo metabolic transformation or degradation before systemic absorption. However, comprehensive toxicological studies specific to this exact compound appear limited in publicly available literature.
The EFSA (European Food Safety Authority) evaluates flavoring substances under Regulation (EC) No 1334/2008, though specific evaluation status for this compound would require consultation with regulatory databases.
Regulatory Status
In the United States, this compound is not listed as GRAS by the FDA, which means it requires appropriate authorization through the Food Additive Petition process or operates under alternative regulatory frameworks for flavoring agents. Some flavoring compounds fall under the Flavor and Extract Manufacturers' Association (FEMA) GRAS evaluation program, which provides independent assessment of flavor safety.
The regulatory status varies internationally. The compound may be permitted in some countries under their flavoring substance regulations while restricted or prohibited in others. Manufacturers utilizing this ingredient must verify compliance with regulations in their specific target markets, including the European Union, Canada, Australia, and other jurisdictions with established flavoring regulations.
Key Studies
Published scientific literature specifically examining trans-4,8-dimethyl-3,7-nonadien-2-one appears limited. Safety assessments for synthetic flavoring compounds typically rely on:
- Structural analogy to known safe flavoring compounds
- Acute toxicity testing data
- Metabolism and fate studies
- Dietary exposure assessments based on realistic usage levels
The lack of reported adverse events combined with minimal exposure levels supports a tentative safety conclusion, though additional data would strengthen confidence. Researchers studying flavor safety and metabolic pathways of terpene-related compounds contribute to understanding compounds in this chemical class.
For the most current safety information, interested parties should consult the FDA's Food Additives Status List, FEMA's GRAS flavoring database, or the European Commission's flavoring substance databases.