3-ACETYL-2,5-DIMETHYLFURAN

CAS: 10599-70-9 FLAVORING AGENT OR ADJUVANT

3-Acetyl-2,5-dimethylfuran (CAS 10599-70-9) is a furan-derived flavoring agent used in food formulations for its nutty and roasted aroma. It has been evaluated in regulatory flavoring committees but detailed intake limits remain under review.

What It Is

3-Acetyl-2,5-dimethylfuran is a synthetic organic compound belonging to the furan class of heterocyclic chemicals, characterized by a five-membered aromatic ring with oxygen and substituted by methyl and acetyl groups. It is identified by the Chemical Abstracts Service (CAS) number 10599-70-9 and is known for its role as a flavoring agent or adjuvant in food applications. The compound appears as a colorless to light yellow liquid with a distinctive roasted, nutty aroma and is thus included in flavor systems intended to impart or enhance specific sensory characteristics in foods. The structural identity of 3-Acetyl-2,5-dimethylfuran aligns with its sensory function because the furan ring and methyl substitutions contribute to volatility and aromatic profile. The technical function as a flavoring agent, as defined by food science and regulatory bodies, supports its use in enhancing flavor complexity rather than providing nutritional value or preservative action. In flavor chemistry, compounds like 3-Acetyl-2,5-dimethylfuran are included often in trace levels to achieve subtle sensory goals. 3-Acetyl-2,5-dimethylfuran also has a FEMA (Flavor and Extract Manufacturers Association) number of 3391, indicating its recognition within flavor industry databases and formulations. However, this represents assessment within the flavor industry rather than a definitive regulatory authorization for all food uses in every jurisdiction, and specific regulatory approvals should be verified per region. Chemical databases list this compound with various synonyms including ethanone derivatives and furan methyl ketones, reflecting its chemical versatility and identification pathways across analytical platforms. Its classification as a "flavoring agent or adjuvant" positions it alongside other aromatic ketones used to bolster aroma profiles in diverse food categories.

How It Is Made

Manufacture of 3-Acetyl-2,5-dimethylfuran involves classical organic synthesis methods applied to substituted furan precursors. At a high level, the process typically starts with 2,5-dimethylfuran, which serves as the core furanic substrate. This substrate is subjected to an acetylation reaction using reagents such as acetic anhydride or acetyl chloride in the presence of a Lewis acid catalyst. Acid catalysts like tin tetrachloride are often employed to activate the furan ring and direct the substitution to the appropriate position on the heterocycle. The acetylation reaction introduces the acetyl functional group, transforming the dimethylfuran into 3-Acetyl-2,5-dimethylfuran. After the chemical reaction is complete, purification steps such as distillation under reduced pressure and solvent extraction are used to isolate the target compound. The purification and quality control processes are intended to yield a product with specified purity suitable for flavor application, often verified by analytical methods like gas chromatography or high-performance liquid chromatography. While specific production volumes and industrial-scale processes are proprietary to manufacturers, the underlying chemistry relies on well-established ketone formation reactions that are common in industrial organic chemistry. Following synthesis and purification, producers typically characterize the chemical identity and physical properties, which include density, boiling point, and refractive index. These properties aid in quality control and formulation decisions when blending this compound into flavoring systems. It is important to recognize that this compound is handled with appropriate safety measures during manufacturing, with protective equipment and controls in place to minimize exposure to workers due to its irritant properties and its volatile organic nature.

Why It Is Used In Food

3-Acetyl-2,5-dimethylfuran is used in food primarily for its contribution to sensory experience rather than for preservation, nutrition, or functional processing roles. Flavoring agents are a key component in food formulation because they influence consumer perception of taste and aroma, driving palatability and product distinction in competitive markets. Food manufacturers integrate compounds like 3-Acetyl-2,5-dimethylfuran into flavor blends to provide nuanced aromatic notes, particularly those characterized as nutty, roasted, or earthy. Flavor chemistry research indicates that subtle differences in molecular structure can produce notable distinctions in aroma perception. The furan ring in 3-Acetyl-2,5-dimethylfuran contributes to volatility and an aromatic profile that interacts with other flavor compounds to create complex sensory impressions. Its specific use in food products is driven by the objective of enhancing or complementing inherent flavor notes, rather than overwhelming them with a single dominant aroma. In applications where roasted or nutty notes are desirable, such as in bakery goods or certain beverages, this compound allows formulators to fine-tune flavor profiles to meet consumer expectations. Its inclusion at low concentrations enables food scientists to balance flavor systems, achieving consistent taste delivery across production batches. Use of such flavoring agents is common across the food industry and is guided by sensory evaluation panels and analytical chemistry to ensure that the intended aromatic effect is achieved without unintended off-notes.

Adi Example Calculation

Because there is no established numeric acceptable daily intake (ADI) for 3-Acetyl-2,5-dimethylfuran due to limited toxicological data, it is not appropriate to perform a quantitative ADI-based example calculation for this specific compound. An illustrative example in general terms might describe how an ADI is used for a compound with an assigned value: if a compound had an ADI of X mg/kg body weight per day, a person weighing 60 kilograms would multiply the ADI by body weight (X multiplied by 60) to determine the maximum amount per day considered unlikely to pose health concerns. In the absence of a defined numeric ADI for this compound, food scientists rely on qualitative risk assessment principles and established flavor industry practices to use the lowest effective concentrations in food formulations. This conservative approach aligns with safety-focused regulatory frameworks that prioritize minimizing exposure when data are incomplete.

Safety And Health Research

Safety and health research concerning 3-Acetyl-2,5-dimethylfuran centers on toxicological data that inform regulatory assessments and risk management decisions. Flavoring agents are evaluated not only for their sensory contributions but also for potential effects on health endpoints such as genotoxicity, systemic toxicity, and metabolic processing. Experimental studies, including in vitro assays, have indicated that related furan-derived compounds may exhibit genotoxic potential, prompting regulatory bodies to approach safety evaluation with caution when available data are limited or raise concern about reactive metabolites. These findings have influenced expert committee conclusions, particularly in the context of JECFA assessments, where the lack of sufficient in vivo genotoxicity evidence precluded the application of standard safety evaluation procedures for groups of related flavoring agents. General toxicological evaluations consider multiple endpoints, including acute toxicity, repeat-dose studies, and specific investigations of genetic toxicity. For flavoring agents used at low levels in food, exposure estimates are informed by typical use concentrations in various food categories, with risk assessments integrating both potency and exposure data. When data gaps exist, conservative assumptions are often employed to protect public health, and regulatory authorities may request additional targeted studies to address uncertainties. In the case of 3-Acetyl-2,5-dimethylfuran, available information suggests that while the compound is used for sensory purposes, safety data are not sufficient to fully characterize all potential health effects, particularly with respect to long-term exposure and in vivo genotoxicity. This research context highlights the ongoing need for comprehensive toxicological datasets that include metabolic studies, repeat-dose toxicity, and well-designed in vivo genotoxicity assays. The outcome of such research informs regulatory decisions and ensures that use in food aligns with public health protection principles.

Regulatory Status Worldwide

Regulatory evaluation of 3-Acetyl-2,5-dimethylfuran varies by region and regulatory framework. In the United States, this compound is listed in the FDA’s Substances Added to Food inventory (formerly EAFUS), which includes flavoring substances that have been evaluated or are recognized by expert panels such as FEMA (Flavor and Extract Manufacturers Association) and JECFA (Joint FAO/WHO Expert Committee on Food Additives). However, inclusion in the inventory does not necessarily equate to specific FDA approval for all uses or quantitative guidance on allowable levels within food products, and no explicit Code of Federal Regulations (CFR) section has been identified that authorizes use at specific limits under U.S. law. In this context, the FDA approval status remains null, with regulatory notes indicating that inventory listing alone should not be interpreted as formal authorization. At the international level, JECFA evaluated this compound within a group of furan-related flavoring agents. JECFA’s assessment highlighted concerns related to genotoxicity for several group members and concluded that the traditional procedure for safety evaluation of flavoring agents could not be applied due to insufficient data, particularly in vivo genotoxicity and metabolism studies. As a result, no specific acceptable daily intake (ADI) or year of evaluation is assigned based on available evidence, and safety assessments remain cautious. In the European Union, while compounds with FEMA numbers are often considered within flavoring inventories, explicit EFSA evaluations and E-number assignments require detailed review of toxicological data and use conditions; at present, no specific E-number has been found for 3-Acetyl-2,5-dimethylfuran, and its formal status under EU regulation remains undefined. These regulatory landscapes underscore the importance of ongoing review and data submission by stakeholders to clarify permissible uses and any potential restrictions. Food manufacturers must follow the most current guidance from relevant authorities in their markets, adhering to general provisions for flavoring agents while recognizing that specific authorization for this compound may be subject to change as new data become available.

Taste And Functional Properties

3-Acetyl-2,5-dimethylfuran exhibits distinctive sensory properties that contribute to its selection as a flavoring agent. Organoleptic evaluations conducted in flavor science contexts describe its aroma as possessing musty, earthy, and nutty characteristics with subtle roasted and almond-like nuances. These sensory notes arise from the molecular interactions between the compound and olfactory receptors, mediated by the structure of the substituted furan ring. In practical applications, 3-Acetyl-2,5-dimethylfuran is typically used at trace concentrations because of its high aromatic potency. At low parts-per-million levels, it can significantly influence the overall flavor profile of a product without contributing off-flavors. Solubility considerations also affect how this compound is used in formulations: it is moderately soluble in organic solvents such as ethanol and propylene glycol, which are common carriers in flavor premixes, but it is only sparingly soluble in water due to its hydrophobic character. Thermal stability and pH interactions are also considered when formulating with this ingredient. Because it has a relatively low boiling point under reduced pressure, heat-sensitive applications must take into account potential volatilization during processing. Flavorists often adjust the timing of addition during manufacturing to optimize retention of desired aromatic attributes. While this compound does not contribute to texture or physical structure, its influence on perceived taste is significant, especially in products where complexity and depth of aroma are important to consumer satisfaction.

Acceptable Daily Intake Explained

The concept of an acceptable daily intake (ADI) is central to regulatory risk assessment for food additives, including flavoring agents. An ADI represents a level of daily exposure that, based on scientific evidence, is considered to pose no appreciable health risk over a lifetime. It is usually derived from toxicological studies that identify a no-observed-adverse-effect level (NOAEL) and apply safety factors to account for uncertainties, such as interspecies differences and variability within human populations. For 3-Acetyl-2,5-dimethylfuran, there is currently no specific ADI established by major international bodies such as JECFA or EFSA due to limitations in the available toxicological data. This absence of a quantitative ADI reflects regulatory caution when data gaps exist, particularly regarding genotoxicity and metabolism. Without sufficient evidence to define a safe exposure level with confidence, regulatory panels have refrained from assigning a numeric ADI, and formal guidance on acceptable daily intake remains undefined. In such cases, the general principle is to use flavoring agents at the lowest levels necessary to achieve the intended sensory effect and to monitor emerging data that may enable future definition of intake thresholds. It is important for stakeholders and consumers to understand that an undefined ADI does not imply a known hazard at typical use levels, but rather highlights the need for comprehensive safety data to support risk assessments. Regulatory frameworks are designed to be adaptive, incorporating new scientific evidence as it becomes available to refine intake recommendations and ensure public health protection.

Comparison With Similar Additives

3-Acetyl-2,5-dimethylfuran can be compared with other furan-derived flavoring agents and aromatic ketones that contribute sensory characteristics in food. Compounds such as furfural and 2-acetylfuran are also used for their aromatic profiles, offering sweet, burnt sugar, or roasted notes. These structurally related compounds share the common feature of a furan ring, which influences volatility and scent perception, yet differences in substitution patterns result in distinct sensory nuances. For instance, 2-acetylfuran often imparts a bread-like or caramel note, while 3-Acetyl-2,5-dimethylfuran tends toward nutty and roasted impressions. Another comparable additive is maltol, which is not a furan compound but similarly contributes a sweet, caramel-like aroma in food formulations. Maltol is often used in combination with other aromatic compounds to build complexity, much like furan derivatives. While maltol has well-defined regulatory acceptance and safety data in many regions, the regulatory status of 3-Acetyl-2,5-dimethylfuran is less firmly established, illustrating how structurally similar compounds can differ in regulatory evaluation status. These comparisons underscore that while flavoring agents may share sensory functional roles, differences in chemical structure, sensory impact, and regulatory背景shape their use and oversight in food products. Understanding these nuances helps food scientists select appropriate ingredients while navigating safety and compliance considerations.

Common Food Applications Narrative

In commercial food applications, 3-Acetyl-2,5-dimethylfuran appears in a diverse range of flavor systems where aromatic enhancement is desired. It is chosen not for any preserved or nutritional role but purely for its ability to contribute aromatic character that complements other sensory elements of finished products. For example, in baked goods, compounds with nutty and roasted notes may be used to augment the inherent flavors of grains and cocoa. When incorporated into bakery mixes or finished products, 3-Acetyl-2,5-dimethylfuran works synergistically with other flavor molecules to produce a rounded and appealing aroma profile. Similarly, manufacturers of snack foods and confectionery may integrate this compound into complex flavor blends to achieve specific taste identities, especially those evoking roasted nuts or caramelized aromas. Because aroma plays a critical role in consumer perception of taste, flavor chemists often include minute amounts of such agents to achieve the desired sensory outcome without altering the core ingredients of the recipe. In dairy-based desserts or frozen dairy products, subtle enhancement of buttery or toasted notes can improve overall acceptance, particularly when combined with sweet or creamy flavor matrices. In beverage formulations, particularly nonalcoholic beverages with flavoring components that mimic roasted, nutty, or malt-like impressions, 3-Acetyl-2,5-dimethylfuran may be part of proprietary flavor blends. Its inclusion helps create complexity that can imitate more expensive natural flavor sources such as coffee or nuts. Across all these applications, the goal remains consistent: to enhance consumer appeal by fine-tuning the aromatic profile of the food or drink. Usage levels are carefully controlled by food scientists to maintain both regulatory compliance and sensory balance.

Safety & Regulations

FDA

  • Notes: Listed in FDA Substances Added to Food inventory but no explicit CFR authorization found and listing alone does not indicate formal approval.

EFSA

  • Notes: No specific EFSA evaluation or E-number identified at this time.

JECFA

  • Notes: JECFA evaluation concluded that standard safety evaluation procedures could not be applied due to data limitations.

Sources

Comments

No comments yet. Be the first to share!