What is Ethyl Levulinate Propyleneglycol Ketal?
Ethyl Levulinate Propyleneglycol Ketal, identified by CAS Number 5413-49-0, is a synthetic chemical compound categorized as a flavoring agent. It is a ketal, specifically a cyclic acetal, formed by the reaction of ethyl levulinate with propylene glycol. In its pure form, it is typically a clear, colorless to pale yellow liquid with a distinct odor profile. This compound is valued in flavor chemistry for its ability to contribute specific sensory attributes, often described as sweet, fruity (reminiscent of berries or tropical fruits), rum-like, or even slightly caramelic notes, making it a versatile ingredient for flavor formulation.
The creation of ketals like Ethyl Levulinate Propyleneglycol Ketal is a common practice in the flavor industry. These compounds are designed to offer unique aromatic profiles, enhance existing flavors, or contribute to the overall complexity of a food product's taste and smell. Its chemical structure allows for stability and controlled release of its characteristic flavor notes when incorporated into food matrices.
Common Uses
As a flavoring agent or adjuvant, Ethyl Levulinate Propyleneglycol Ketal is utilized across a broad spectrum of food and beverage applications. Its primary function is to impart or enhance specific flavor characteristics that are desirable in the final product. Common uses include:
* **Confectionery:** Found in candies, chocolates, and chewing gums to provide sweet and fruity undertones.
* **Beverages:** Used in soft drinks, fruit juices, alcoholic beverages (e.g., rum-flavored products), and energy drinks to create or enhance specific flavor profiles.
* **Baked Goods:** Incorporated into cakes, cookies, pastries, and other baked items to contribute fruity, sweet, or baked-note aromas.
* **Dairy Products:** Can be found in yogurts, ice creams, and flavored milk products for fruity or dessert-like flavors.
* **Savory Applications:** Occasionally used in more complex savory flavor formulations where a subtle sweet or fruity note can complement other ingredients.
Due to its potent flavor impact, Ethyl Levulinate Propyleneglycol Ketal is typically used at very low concentrations, consistent with current good manufacturing practices (GMP) for flavorings. Its versatile flavor profile makes it a valuable tool for flavorists seeking to achieve specific taste and aroma effects in food products.
Safety Assessment
The safety of Ethyl Levulinate Propyleneglycol Ketal has been evaluated by various scientific bodies globally for its use as a flavoring agent. In the United States, it is not listed as Generally Recognized As Safe (GRAS) by the U.S. Food and Drug Administration (FDA) through a formal GRAS affirmation or notification process. However, the Flavor and Extract Manufacturers Association (FEMA) has affirmed Ethyl Levulinate Propyleneglycol Ketal as GRAS (FEMA GRAS No. 3804) for its intended use as a flavoring substance.
FEMA's GRAS assessment is an industry-recognized program based on scientific review by an independent expert panel, considering chemical characteristics, estimated dietary exposure, and toxicological data. The FDA acknowledges that substances can be GRAS based on scientific procedures without formal FDA notification. According to FDA records, there have been 0 adverse events and 0 recalls associated with this additive.
In the European Union, Ethyl Levulinate Propyleneglycol Ketal has been evaluated by the European Food Safety Authority (EFSA) within the framework of its Flavouring Group Evaluations (FGE). It belongs to FGE.19, 'Aliphatic and alicyclic ketals and acetals containing additional oxygenated functional groups' (flavouring substance No. 049). EFSA's scientific panel concluded that there were no safety concerns for Ethyl Levulinate Propyleneglycol Ketal at estimated levels of intake for its use as a flavoring, when considering its metabolism to well-known compounds such as ethyl levulinate and propylene glycol, both of which have established safety profiles. These evaluations often consider a 'common principle' approach, grouping structurally related flavorings with similar metabolic pathways.
Toxicological studies typically indicate that ketals like Ethyl Levulinate Propyleneglycol Ketal are readily hydrolyzed in the gastrointestinal tract into their parent alcohols and carbonyl compounds, which are then metabolized and excreted. These studies generally do not raise concerns regarding genotoxicity, mutagenicity, or other adverse effects when used at concentrations relevant to flavoring. The scientific consensus among these expert panels is that Ethyl Levulinate Propyleneglycol Ketal is safe under the conditions of its intended use as a flavoring agent.
Regulatory Status
* **United States (FDA):** Ethyl Levulinate Propyleneglycol Ketal is not formally affirmed as GRAS by the FDA. However, it is recognized as GRAS by the Flavor and Extract Manufacturers Association (FEMA GRAS No. 3804), an industry self-affirmation widely accepted for flavorings in the US market.
* **European Union (EFSA/European Commission):** Ethyl Levulinate Propyleneglycol Ketal is authorized for use as a flavoring substance in the EU. It has been evaluated by EFSA (FGE.19, No. 049) and is included in the Union List of Flavourings (Regulation (EU) No 872/2012, amending Annex I to Regulation (EC) No 1334/2008), indicating its permitted use under specified conditions.
* **Other Countries:** Similar to the EU, many other countries and regions follow international guidelines or their own national assessments, often aligning with evaluations from bodies like EFSA or JECFA (Joint FAO/WHO Expert Committee on Food Additives) if applicable to a broader group.
The regulatory status reflects a general acceptance of this compound as a safe flavoring ingredient when used at appropriate levels in food.
Key Studies
Key safety evaluations for Ethyl Levulinate Propyleneglycol Ketal have been conducted by scientific bodies responsible for assessing food additives and flavorings:
* **EFSA Flavouring Group Evaluation 19 (FGE.19):** This comprehensive evaluation covered 'Aliphatic and alicyclic ketals and acetals containing additional oxygenated functional groups,' which includes Ethyl Levulinate Propyleneglycol Ketal (No. 049). The panel reviewed chemical and toxicological data, estimating exposure from use in food. The conclusion was that there were no safety concerns for the flavouring substances in FGE.19, including Ethyl Levulinate Propyleneglycol Ketal, at their estimated levels of intake. The evaluation considered the rapid hydrolysis of these substances into known and safe metabolic products.
* **FEMA GRAS Assessment:** The independent expert panel of FEMA has reviewed toxicological data, exposure estimates, and other scientific information for Ethyl Levulinate Propyleneglycol Ketal, leading to its inclusion on the FEMA GRAS list (No. 3804). This assessment supports its safety for use as a flavoring ingredient in food.
These studies and evaluations form the basis for the regulatory acceptance of Ethyl Levulinate Propyleneglycol Ketal as a food flavoring. The consistent finding across these expert assessments is the absence of significant safety concerns when the substance is used within accepted flavoring concentrations and good manufacturing practices.