2-ACETYL-3-METHYLPYRAZINE

CAS: 23787-80-6 FLAVORING AGENT OR ADJUVANT

2-Acetyl-3-methylpyrazine is a synthetic flavoring compound with a roasted, nutty aroma used to impart or enhance flavors in food formulations.

What It Is

2-Acetyl-3-methylpyrazine is an aromatic chemical compound in the class of pyrazines that functions primarily as a flavoring agent or adjuvant in food applications. As a derivative of pyrazine, it contains a heterocyclic ring with nitrogen atoms and an acetyl group that contributes to its distinctive sensory properties. It is identified by the CAS number 23787-80-6 and is recognized by international flavor industry references, including FEMA number 3964, indicating its use in flavor formulations. This compound is not only used in food systems but also studied for its presence in cooked and roasted food products where pyrazines form naturally. In the context of food chemistry, 2-Acetyl-3-methylpyrazine is appreciated for its ability to deliver roasted, corn-like, toasted, and nutty sensory impressions that are reminiscent of roasted nuts such as hazelnut and filbert. Pyrazines are a broad class of heterocyclic compounds commonly associated with flavor in roasted, baked, and fried foods. The inclusion of this compound in flavor systems recognizes its role in contributing specific sensory notes that cannot be easily replicated by other classes of flavors without altering the overall aroma profile. Understanding what this compound is also requires recognizing that it is not a singularly occurring natural compound in all foods, but rather one that is found in trace amounts in many roasted food matrices or added intentionally during formulation. Inherent in this description is the importance of both its chemical identity and its functional role in flavor design for processed foods, beverages, and seasonings.

How It Is Made

The manufacture of 2-Acetyl-3-methylpyrazine for commercial use involves synthetic organic chemistry methods that construct the pyrazine ring and introduce the acetyl functional group in the correct position. Industrial production typically begins with building block chemicals such as substituted pyrazines and uses catalysts and controlled reactions to ensure the correct substitution pattern of methyl and acetyl groups. Synthetic routes are optimized to yield high purity product because flavor compounds often require stringent purity specifications to ensure predictable sensory performance and regulatory compliance. In manufacturing practice, intermediates such as methyl-substituted pyrazines are reacted under controlled conditions with acylating agents to form the acetyl derivative. Conditions such as temperature, solvent choice, and reaction time are selected to maximize yield and minimize byproducts. After synthesis, the crude material typically undergoes purification steps, which may include distillation, crystallization, or chromatographic techniques to achieve high purity. Analytical methods such as gas chromatography and mass spectrometry are used to confirm the identity and purity of the product, ensuring it meets industry and regulatory specifications for use in food flavoring. From a materials standpoint, producers must also consider storage, stability, and handling of both intermediates and final product, as pyrazines can be sensitive to light and other conditions. Quality control efforts are crucial to ensure consistency across production lots, which directly impacts flavor performance in downstream applications. While the exact proprietary process details are not publicly disclosed due to commercial competitiveness, the overall approach reflects standard practices in fine chemical and flavor compound manufacturing.

Why It Is Used In Food

The selection of 2-Acetyl-3-methylpyrazine in food formulations is driven by its unique sensory profile and its ability to augment or create specific flavor impressions that are desirable in many products. Food scientists and flavorists use this compound to recreate or enhance notes associated with roasted nuts, toasted cereals, and baked goods, which are difficult to achieve with other flavor chemistries alone. Its inclusion can provide a signature roasted quality that complements other flavor components and helps round out complex sensory profiles. In practical terms, food formulators might use this compound in baked goods to enhance the perception of toastiness or in snack foods to evoke roasted grain characteristics. In confectionery, it can contribute depth to caramel-like notes or balance sweet flavors with savory undertones. In coffee or cocoa applications, it may be used to accentuate the natural roasted aromas present in these products. Because of its potency, small amounts are typically sufficient to achieve the desired effect, which aligns with cost and formulation considerations. The use of 2-Acetyl-3-methylpyrazine also reflects broader trends in consumer preferences for rich, roasted, and artisanal flavor profiles. As demand for more complex sensory experiences grows, flavor chemists look to compounds like this one to achieve nuanced and multi-faceted taste experiences. Ultimately, it is chosen because it contributes specific desirable sensory dimensions that improve product appeal without overpowering other flavor elements.

Adi Example Calculation

An illustrative example of how an Acceptable Daily Intake framework operates can help clarify the concept for lay readers. If a regulatory body had established a numerical ADI for a compound at a certain number of milligrams per kilogram of body weight per day, one could calculate estimated intake for an adult weighing 70 kilograms. For instance, if an ADI were established at X mg/kg body weight, then the total allowable intake would be X times 70 for that individual. This hypothetical calculation would serve to show how regulators translate scientific assessments into a lifetime exposure framework. In the case of 2-Acetyl-3-methylpyrazine, no numerical ADI was set because the conclusion was that there is no safety concern at typical intake levels. Therefore, a specific calculation using an ADI is not applicable. However, the general principle remains: ADI calculations help contextualize risk by comparing estimated exposure to a safety threshold derived from toxicological data. This approach supports regulatory decision-making and helps ensure that flavor ingredients used in food do not pose undue health risks.

Safety And Health Research

Safety and health research on 2-Acetyl-3-methylpyrazine encompasses review of toxicological data to ensure that its use as a flavoring agent does not pose undue risks to consumers. Regulatory and scientific bodies such as JECFA review studies examining endpoints including acute toxicity, subchronic exposure, genotoxicity, and other relevant toxicological parameters. Based on such reviews, JECFA concluded that there is no safety concern at current intake levels when used as a flavoring agent, indicating that available evidence supports its safety in typical food use scenarios as of the evaluation date. Beyond regulatory evaluations, academic and industry toxicological research may explore aspects of exposure and safety margins, often using established methods to assess potential effects. These evaluations consider typical use levels in food, expected dietary exposure, and established toxicological thresholds. While detailed study results are not always publicly accessible in full, the overarching conclusion from authoritative evaluations is that the compound does not raise safety concerns under normal use conditions in food formulations. It is important to recognize that safety assessments rely on accumulated data and established scientific methods, and ongoing surveillance and research continue to inform regulatory perspectives. Stakeholders in food safety monitor new evidence to ensure that flavor ingredients remain consistent with current scientific understanding and consumer protection standards.

Regulatory Status Worldwide

At the global regulatory level, 2-Acetyl-3-methylpyrazine has been evaluated by authoritative bodies responsible for assessing the safety of food additives. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has reviewed this compound and assigned it the JECFA number 950, indicating its identification in the Joint FAO/WHO database. In the JECFA evaluation, which was completed in 2001, the committee concluded that there is no safety concern at current levels of intake when used as a flavoring agent, reflecting a risk assessment based on available toxicological evidence and typical exposure scenarios in food use. This evaluation provides an international benchmark for regulatory bodies and industry stakeholders regarding its safety profile and use in food products. The year of this evaluation and the specific language used in the assessment are documented in JECFA reports. In the United States, the Flavor and Extract Manufacturers Association (FEMA) has assigned the compound FEMA number 3964, which indicates it has been reviewed for use as a flavor ingredient. Materials on the FDA Substances Added to Food (formerly EAFUS) inventory list flavor ingredients with FEMA GRAS assessments submitted to the U.S. Food and Drug Administration. However, the presence on such a list does not constitute a direct FDA approval in the same way as a food additive regulation under the CFR. Consequently, formal approval status under U.S. food additive regulations remains unspecified, and this context is noted due to the absence of explicit CFR citations for this compound. In the European Union and other regions, specific additive codes such as E-numbers are not universally assigned to all flavoring agents, and 2-Acetyl-3-methylpyrazine does not currently have a distinct E-number designation in publicly available lists. Its use in foods is typically managed under broader flavoring regulations that permit flavor ingredients meeting safety and purity criteria. Regulatory frameworks outside of specific additive numbers often rely on general food safety and flavoring ingredient guidelines to govern its use. This narrative reflects the status of regulatory recognition and requirements that influence how it is managed in global food markets.

Taste And Functional Properties

The organoleptic properties of 2-Acetyl-3-methylpyrazine are characterized by a pronounced roasted and nutty aroma that can be perceived even at low concentrations. Sensory descriptions commonly include terms such as toasted grain, roasted hazelnut, and corn-like notes. These characteristics are attributable to its pyrazine core and the specific substitution pattern, which influences how the molecule interacts with olfactory receptors. The compound’s sensory impact makes it particularly valuable in applications that aim to evoke roasted or toasted food experiences. Functionally, this compound behaves as a volatile flavor compound with relatively low odor threshold, meaning that it can be detected by smell at low levels in food systems. Its volatility allows it to contribute significantly to aroma perception, which is a key component of overall flavor. In addition to aroma contribution, it interacts with other flavor compounds in complex ways, often serving as a foundation upon which other sensory notes are built. It is generally used in combination with other flavor molecules to achieve balanced and desirable sensory profiles. From a stability perspective, flavor compounds like 2-Acetyl-3-methylpyrazine must withstand processing conditions such as heat and pH changes in food manufacturing. While some degradation can occur under extreme conditions, it is considered reasonably stable in most food processing environments. Its solubility and partitioning behavior also influence how it is incorporated into formulas, with considerations for encapsulation or carrier systems to ensure targeted release and performance in the final product. Understanding both the taste attributes and functional behavior is essential for effective application in flavor design.

Acceptable Daily Intake Explained

An Acceptable Daily Intake (ADI) is a concept used in food safety to describe the amount of a substance that can be ingested daily over a lifetime without appreciable health risk. It is typically expressed on a body weight basis and derived from toxicological data with conservative safety factors applied. For 2-Acetyl-3-methylpyrazine, JECFA did not establish a numerical ADI because its evaluation concluded that there is no safety concern at current levels of intake when used as a flavoring agent. This type of conclusion indicates that exposure from typical use levels in food is considered to be within safe limits based on the evidence reviewed by experts. It is important to clarify that an ADI is not a nutritional recommendation, but rather a regulatory reference reflecting safety considerations. When regulators state that there is no safety concern at current intake levels, it means that estimated exposures from consumption of foods containing this compound are sufficiently low relative to available toxicological data that no specific numerical threshold was deemed necessary. In practice, this allows food manufacturers to use the compound within industry practice levels, and regulatory bodies maintain oversight through monitoring and evaluation. Consumers can understand that such regulatory language reflects a risk-based approach: safety evaluations account for typical use patterns, human exposure estimates, and scientific evidence to ensure that flavoring agents like 2-Acetyl-3-methylpyrazine are consistent with food safety standards.

Comparison With Similar Additives

Comparing 2-Acetyl-3-methylpyrazine with similar flavoring additives helps illustrate how flavor chemists select compounds based on sensory and functional properties. Other pyrazines, such as 2,3-diethylpyrazine or 2,5-dimethylpyrazine, also deliver roasted, nutty, or toasted sensory notes but differ in their exact aromatic character due to variations in molecular structure. These differences influence how each compound is perceived in complex flavor matrices and guide formulators in selecting combinations that achieve desired profiles. Compared with compounds outside the pyrazine class, such as certain lactones or aldehydes used for buttery or caramel notes, pyrazines like 2-Acetyl-3-methylpyrazine offer a distinctly roasted or toasty quality that complements rather than replicates the sensory effect of other classes. While lactones may evoke creamy or buttery impressions, pyrazines tend to add sharpness and depth associated with dry heat processing. Understanding these comparative roles helps flavorists balance sensory elements in applications such as baked goods, snack foods, and roasted beverage flavors. In summary, the comparison underscores that flavor ingredients are selected not only for their individual sensory contributions but also for how they interact with other compounds to produce complex and appealing flavor experiences. 2-Acetyl-3-methylpyrazine occupies a niche within this spectrum, delivering roasted and nutty impressions that enhance a wide range of food products.

Common Food Applications Narrative

2-Acetyl-3-methylpyrazine finds broad application across many categories of food where roasted, toasted, or nutty flavor notes are desirable. In baked goods such as bread, crackers, and cookies, it can enhance the perception of toastiness and contribute to overall depth of flavor. The compound’s ability to evoke roasted grain character makes it valuable in breakfast cereals, where consumers often expect rich aromatic profiles that resonate with home-baked sensory experiences. In snack foods, which include chips, extruded snacks, and savory bites, this compound helps develop complexity and richness. The toasted and nutty notes can complement salt and seasoning blends, creating balanced sensory profiles that appeal to a wide range of palates. In confectionery and chocolate applications, 2-Acetyl-3-methylpyrazine can contribute to caramel-like undertones and deepen cocoa impressions, enhancing the overall sensory richness of the product. Beyond solid foods, beverages such as roasted coffee and malt-based drinks benefit from its inclusion when formulating flavor profiles that simulate artisanal roasting. The compound may also be employed in savory sauces and seasonings to accentuate roasted or caramelized notes. While the specific use levels are generally low due to its potency, its contribution to product aroma and taste complexity is significant. Collectively, these applications demonstrate how a single flavor compound can play a pivotal role in shaping sensory experiences across diverse product categories.

Safety & Regulations

FDA

  • Notes: Approval status under CFR is unknown due to lack of specific CFR citation.

EFSA

  • Notes: No specific EFSA E-number or ADI information was found.

JECFA

  • Year: 2001
  • Adi Display: No safety concern at current levels of intake when used as a flavouring agent

Sources

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