4-ACETOXY-2,5-DIMETHYL-3(2H)-FURANONE

CAS: 4166-20-5 FLAVORING AGENT OR ADJUVANT

4-Acetoxy-2,5-dimethyl-3(2H)-furanone is a synthetic flavoring compound used for its sweet caramel and fruit-like aroma in food formulations.

What It Is

4-Acetoxy-2,5-dimethyl-3(2H)-furanone is a heterocyclic organic compound characterized by a furanone ring substituted with acetoxy and methyl groups. It is recognized in the flavor and fragrance industry for its distinct sweet, caramel-like sensory attributes, fitting within the broader class of lactones and oxygen-containing aroma chemicals. This compound carries the Chemical Abstracts Service Registry Number 4166-20-5, which unequivocally identifies its structure for regulatory and scientific purposes. It is synthesized for use as a flavoring agent or adjuvant in food applications and is sometimes labeled by alternative chemical names due to different nomenclature conventions across scientific literature and supply catalogues. In the flavor industry, 4-Acetoxy-2,5-dimethyl-3(2H)-furanone is often referred to as Furaneol acetate or caramel acetate when described in marketing materials or technical specifications. This reflects its organoleptic profile, which combines sweet and caramel-like notes with subtle fruitiness. Due to its chemical structure, the compound falls under the category of furanone esters, which are widely studied for their contribution to the aroma and taste profiles of many natural and processed foods. The compound’s sensory contributions make it valuable for enhancing or modifying flavor profiles in complex food matrices where sweet, baked, or fruit-like aromas are desired. While the sensory profile of this compound is well recognized among flavor chemists and formulators, it is important to clarify that its inclusion in food products is governed by regulatory frameworks that require assessment of safety, purity, and appropriate use levels. The compound’s use as a flavoring agent is technically defined by its ability to act as an adjuvant that supports the delivery of desired sensory characteristics in foods and beverages without imparting adverse sensory effects at typical use concentrations.

How It Is Made

The synthesis of 4-Acetoxy-2,5-dimethyl-3(2H)-furanone typically involves chemical reactions that introduce an acetoxy functional group onto a furanone scaffold. At a high level, production begins with a furanone precursor such as 2,5-dimethyl-3(2H)-furanone. This precursor undergoes functionalization through esterification with acetic acid derivatives, commonly acetic anhydride or acetyl chloride, under conditions that promote selective formation of the acetoxy substituent at the 4 position of the ring. The reaction conditions – including catalysts, solvent systems, temperature control, and purification steps – are optimized to yield a final product with sufficient purity for further application development. Purification techniques frequently include distillation and chromatographic separation to remove unreacted starting materials and side products. High-purity grades of this compound intended for use in flavors generally undergo further refinement to achieve specifications suitable for food-grade applications. This may involve analytical techniques such as gas chromatography to confirm the absence of impurities that could negatively influence flavor or pose safety concerns. Manufacturers that supply this compound for fragrance or flavor applications may produce technical documentation confirming that the material meets relevant industry standards for such usage. For example, some suppliers note that the compound meets purity specifications consistent with general industry practices and may follow guidelines established by flavor industry groups or regulatory frameworks. While the technical process for synthesizing 4-Acetoxy-2,5-dimethyl-3(2H)-furanone is well established within chemical manufacturing contexts, detailed proprietary information about industrial-scale production methods is typically held confidential by producers. However, the fundamental chemistry – esterification of a substituted furanone with an acetylating agent followed by purification – is the essential route by which this flavor compound is obtained for commercial distribution.

Why It Is Used In Food

4-Acetoxy-2,5-dimethyl-3(2H)-furanone is used in food primarily for its ability to impart complex sweet and caramel-like aroma notes that enrich the sensory profile of flavor formulations. In flavor science, certain compounds contribute distinct volatile signatures that can be recognized by the human olfactory system as pleasant, sweet, or reminiscent of baked goods, fruits, or confectioneries. This compound’s aroma profile is particularly effective at enhancing or modifying flavor perceptions associated with sweetness, even at low concentrations, making it a useful tool in the formulation of flavors for products such as confections, dairy analogues, beverages, and baked goods. Unlike basic sweeteners that increase perceived sweetness on the tongue, volatile aroma compounds contribute to the overall flavor experience through smell. The integration of 4-Acetoxy-2,5-dimethyl-3(2H)-furanone into flavor blends allows formulators to achieve more nuanced sensory effects without contributing caloric sweetness. For example, in complex flavor systems, certain lactone esters like this one can help balance or round off sharp top notes, provide warm and rich character, or reinforce fruit-forward profiles when used in combination with other aroma compounds. The functional role of such aroma chemicals stems from their interaction with olfactory receptors, which integrate multiple chemical signals into recognizable aroma impressions. The preference for incorporating this compound into specific food and beverage formulations arises from its distinct sensory attributes that are difficult to replicate with basic food ingredients alone. In addition, its compatibility with other common flavor ingredients allows for flexible blending across multiple product categories. Because aroma and flavor perception significantly influence consumer acceptance and enjoyment of foods, flavor chemists rely on compounds like 4-Acetoxy-2,5-dimethyl-3(2H)-furanone to achieve targeted sensory outcomes in a controlled and reproducible manner.

Adi Example Calculation

Because a specific acceptable daily intake (ADI) for 4-Acetoxy-2,5-dimethyl-3(2H)-furanone has not been documented in authoritative regulatory sources, illustrative numerical intake calculations cannot be provided here. Typically, calculating estimated daily intake involves multiplying a hypothetical ADI value by an individual’s body weight to estimate the maximum amount of a substance that could be consumed daily without appreciable health risk. However, without an established ADI for this compound, such calculations remain speculative and are not included. Instead, when ADIs are available for other flavors or food additives, the illustrative process generally involves selecting a representative body weight, such as 70 kilograms for an adult, and applying the ADI (for example, an ADI of X mg per kilogram body weight per day) to estimate intake. This illustrative computation helps contextualize how regulators translate toxicological benchmarks into practical exposure guidance. For 4-Acetoxy-2,5-dimethyl-3(2H)-furanone, the lack of a documented ADI from identified regulatory evaluations means that such an example cannot be responsibly developed, reinforcing the importance of referring to formal regulatory assessments when conducting exposure analyses for food additives.

Safety And Health Research

Scientific assessments of flavoring agents and related aroma compounds generally focus on establishing toxicological profiles that inform safe use in food. These assessments may consider endpoints such as acute toxicity, genotoxicity, subchronic toxicity, reproductive effects, and other relevant biological responses. Data from such studies help regulators determine whether a compound can be safely consumed at levels encountered in food products. For many flavor compounds, including those similar in chemical nature to 4-Acetoxy-2,5-dimethyl-3(2H)-furanone, comprehensive toxicological datasets may be limited in the public domain, especially for compounds that are not widely used or extensively evaluated by major regulatory bodies. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) maintains a searchable database of additives and flavoring agents that have been subject to evaluation, and this database includes detailed summaries and specifications for substances that have undergone formal review. However, specific evaluation entries, toxicological data, or acceptable daily intake (ADI) values for 4-Acetoxy-2,5-dimethyl-3(2H)-furanone were not located in the publicly accessible JECFA database during research for this profile. Without an authoritative entry documenting a formal evaluation and associated safety conclusions, it is not possible to provide precise toxicological benchmarks or numeric ADI values in this section. In the absence of directly d toxicological data from authoritative sources, general safety considerations for flavoring agents emphasize controlled use at concentrations consistent with good manufacturing practices and industry norms. Such practices involve using the minimum effective concentration needed to achieve the desired sensory outcome and ensuring that the compound’s use does not inadvertently expose consumers to higher levels than necessary. Where formal evaluations have been conducted by safety panels, such findings would provide a more definitive basis for conclusions about safety and acceptable intake levels, but these were not identified in available evidence for this specific compound.

Regulatory Status Worldwide

Reliable public regulatory records specifically listing 4-Acetoxy-2,5-dimethyl-3(2H)-furanone as an approved food additive with an associated INS/E-number or precise regulatory code in major food additive regulations could not be found within the available authoritative sources. Although suppliers may note that the compound meets certain internal purity specifications and industry guidelines, this is not equivalent to a formal regulatory listing that confers explicit approval for food use in jurisdictions such as the United States, the European Union, or Codex Alimentarius. As a result, definitive statements about internationally harmonized approval status, permitted use levels, or maximum concentration limits are not currently supported by directly d regulatory documentation. Different jurisdictions have distinct systems for evaluating and authorizing flavoring substances. In the United States, for example, compounds used as flavoring agents may require review under general flavoring regulations if they are to be incorporated into foods, and such review can lead to inclusion in lists of substances considered safe when used in accordance with good manufacturing practice. In the European Union, flavoring substances are evaluated by designated scientific panels that assess safety data to determine acceptable use conditions. In both cases, the presence of a compound on commercial supplier technical documents does not alone establish regulatory acceptance. Because comprehensive regulatory listings specific to 4-Acetoxy-2,5-dimethyl-3(2H)-furanone were not accessible from authoritative regulatory databases at the time of writing, this section refrains from assigning specific approval codes or maximum use levels. Manufacturers, flavor houses, and food producers typically consult current official regulatory databases or engage with competent food safety authorities to confirm the legal status of a given compound in their target market before use. Such due diligence ensures compliance with applicable food safety and labeling requirements in each jurisdiction.

Taste And Functional Properties

From a sensory perspective, 4-Acetoxy-2,5-dimethyl-3(2H)-furanone is known for its sweet, caramel-like aroma, often described as reminiscent of baked sugar, fruit, or strawberry nuances. These sensory attributes arise from the compound’s molecular structure, which interacts with olfactory receptors in the nasal epithelium. Such interactions trigger perceptions associated with sweetness and warm, rich notes, even though the compound does not contribute to sweetness on the tongue as a nutritive sweetener would. Instead, its role is strictly aromatic, enhancing the perception of flavor complexity in food products. In terms of physicochemical behavior, compounds of this class are generally more volatile than many non-aromatic food ingredients, meaning they readily enter the gas phase from a food matrix and reach olfactory receptors during consumption. The volatility of 4-Acetoxy-2,5-dimethyl-3(2H)-furanone supports its functional efficacy as a flavoring ingredient because aroma perception depends on the release of volatile molecules from food upon chewing, swallowing, or heating. Factors such as temperature, pH, and the presence of other ingredients can influence the release and stability of aromatic compounds, and formulation scientists consider these variables when integrating this compound into complex food systems. While the compound is valued for its aroma contributions, formulators also consider its compatibility with other ingredients, including solvents, carriers, and other flavor or fragrance molecules. This compatibility influences the overall stability of the flavor blend, as well as the shelf life of the finished product. Stabilizing agents and encapsulation technologies are often employed to protect sensitive aroma compounds and control their release during processing, storage, and consumption, ensuring that the desired sensory profile persists through the product’s lifecycle.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) represents a regulatory science concept used to estimate the amount of a substance that can be consumed daily over a lifetime without appreciable health risk, based on available toxicological data. ADIs are typically derived from studies in animals or humans and include safety factors to account for uncertainties in data and variability in human populations. However, for 4-Acetoxy-2,5-dimethyl-3(2H)-furanone, a specific numeric ADI value has not been established in the public records of major international regulatory bodies such as JECFA or EFSA at the time of research. Without an explicitly documented ADI from authoritative chemical safety evaluations, it is not possible to provide a numeric reference range for this compound. Generally, when regulatory scientific panels assign an ADI, the numeric value and pertinent study data are made publicly available through formal reports or specifications databases. In the absence of such documentation, manufacturers and food formulators rely on good manufacturing practices that emphasize using flavoring compounds at the lowest levels required to achieve desired sensory effects, thereby minimizing unnecessary consumer exposure. It is important to recognize that the absence of a published ADI in itself does not imply a known hazard but rather reflects the current status of publicly accessible evaluations. Should formal evaluations be conducted and published in the future, those documents would provide a more concrete basis for detailed guidance on acceptable intake levels for this compound.

Comparison With Similar Additives

4-Acetoxy-2,5-dimethyl-3(2H)-furanone shares functional similarities with other lactone and ester flavor compounds that contribute sweet, caramel, or fruit-like aromas. For instance, compounds such as ethyl maltol and gamma-undecalactone are also employed in flavor formulations to impart rich sweet or fruity notes, respectively. Ethyl maltol is known for its cotton candy-like sweetness and is widely used in confectionery and baked goods, while gamma-undecalactone offers peach-like, creamy nuances. Compared to these compounds, 4-Acetoxy-2,5-dimethyl-3(2H)-furanone may contribute deeper caramel characteristics with subtle fruit undertones, making it a distinct but complementary aromatic building block in flavor blending. Similarly, other furanone derivatives such as 4-hydroxy-2,5-dimethyl-3(2H)-furanone (Furaneol) provide sweet strawberry-like notes and are commonly encountered in fruit-flavored applications. The acetoxy derivative of this furanone series, as present in 4-Acetoxy-2,5-dimethyl-3(2H)-furanone, tends to emphasize the richer, baked, or caramel facets of the aromatic profile, while modifications to the ring structure or substituent groups influence volatility and sensory perception. In practical flavor formulation, these subtle differences allow flavorists to tailor the final sensory impression by selecting compounds that align with the desired organoleptic outcome. Despite these functional parallels, the regulatory evaluation status and documented safety profiles of each compound can differ significantly. Some well-studied flavor additives have established ADIs and clear regulatory listings, while others, like 4-Acetoxy-2,5-dimethyl-3(2H)-furanone, may not yet have widely published evaluations in major food additive regulatory databases. Product developers and regulatory specialists typically assess each compound on its own merits, considering both sensory contributions and the availability of authoritative safety data when determining appropriate use in food systems.

Common Food Applications Narrative

In the realm of flavor formulation, 4-Acetoxy-2,5-dimethyl-3(2H)-furanone appears most frequently in products where rich, sweet, and fruit-associated aromatic characteristics are desirable. Flavorists craft profiles for items such as caramel-flavored confections, fruit-flavored beverages, and dessert-inspired bakery products by combining multiple aroma chemicals to simulate complex sensory experiences. Within such formulations, this compound functions as one of many contributors to a cohesive flavor impression that consumers recognize and enjoy. For example, in confectionery products where notes of caramel, toffee, or brown sugar are prominent, this compound can boost the richness of the aroma without adding caloric content. In beverage applications featuring fruit-forward profiles, its subtle fruity undertones may complement natural or artificial fruit essences. Similarly, in bakery and dairy analog flavors, the compound’s warm, sweet aroma can help recreate sensory cues associated with freshly baked goods or creamy desserts. These applications reflect the broader role of flavor and fragrance chemistry in contemporary food production, where specific aroma compounds are judiciously used to achieve targeted sensory outcomes. The selection of such compounds considers not only their individual sensory contributions but also their interactions with other components in the formula. Product developers often fine-tune concentrations and combinations to ensure consistency, stability, and consumer appeal. In all these applications, 4-Acetoxy-2,5-dimethyl-3(2H)-furanone serves as a versatile aromatic building block within the larger framework of flavor science, helping to create multi-dimensional sensory experiences across a range of food categories.

Safety & Regulations

FDA

  • Notes: No specific FDA regulation code found in available authoritative sources

EFSA

  • Notes: No EFSA evaluation or E-number found in available authoritative sources

JECFA

  • Notes: No specific JECFA evaluation entry found for this CAS in the public database

Sources

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