BENZYL TRANS-2-METHYL-2-BUTENOATE

CAS: 37526-88-8 FLAVOR ENHANCER, FLAVORING AGENT OR ADJUVANT

**BENZYL TRANS-2-METHYL-2-BUTENOATE** is a synthetic flavoring agent used to enhance or add specific taste profiles in food formulations. It is identified by the CAS number 37526-88-8 and evaluated by international expert bodies for flavor use. Regulatory clarity on its approval status in certain regions is limited, though it is included in flavor inventories evaluated by scientific panels such as JECFA and FEMA. Its sensory properties and technical role focus on providing balsamic, earthy, and nuanced aromatic characteristics in complex flavor systems. This ingredient is subject to criteria of good manufacturing practice in jurisdictions where it is used. *Notes: comprehensive regulatory listings such as CFR sections or specific E-numbers for the EU are not established in available authoritative sources.*

What It Is

BENZYL TRANS-2-METHYL-2-BUTENOATE is a defined chemical entity in the class of ester-based flavoring agents, used to modify or enhance the sensory profile of foods and beverages. As an aromatic ester, it contributes to flavor complexity by imparting balsamic, earthy, and mushroom-like notes that are leveraged in specific culinary applications. The compound is registered under the CAS number 37526-88-8, which uniquely identifies it in chemical inventories and regulatory evaluations. Other synonyms and systematic names reflect its ester structure (a benzyl ester of a methyl-substituted butenoic acid). These chemical synonyms are useful in regulatory filings or technical specifications. Its technical function in formulations is to act as a flavor enhancer or adjuvant, meaning it does not necessarily provide nutrition but modifies taste perception. In regulatory inventories and safety evaluations, flavoring agents like benzyl trans-2-methyl-2-butenoate are considered based on their chemical characteristics, exposure levels, and safety data available. Such flavoring agents are evaluated by expert bodies for safety at low levels typical of use in food. In international flavor and food additive databases, this compound appears under flavoring agent functional categories, aligning with its sensory impact. Its inclusion in flavor libraries reflects its intended purpose as a component in complex flavor formulations rather than as a primary ingredient. As with all flavoring agents, its use in food is guided by principles of good manufacturing practice, meaning the quantity used should be the minimum necessary to achieve the desired flavor effect. Chemically, this ingredient belongs to a family of aromatic esters, compounds known for varied olfactory profiles, often exploited in both food and fragrance industries. While some aromatic esters occur naturally in foods or beverages, others, like benzyl trans-2-methyl-2-butenoate, may be synthesized to achieve consistency and purity for industrial applications. In sensory science, esters are renowned for contributing to fruity, floral, or spicy nuances, and this particular ester’s profile situates it within specialty uses where specific aromatic notes are desired.

How It Is Made

The manufacture of BENZYL TRANS-2-METHYL-2-BUTENOATE typically involves an esterification reaction between an acid component (a methyl-substituted butenoic acid) and benzyl alcohol under controlled conditions. In industrial practice, such esterifications are conducted with catalysts and under conditions that favor the formation of the ester linkage while minimizing by-products. The raw materials must meet purity standards appropriate for food-related applications when the end product is intended for use in flavor systems. In such synthetic esterification processes, catalysts such as acidic resins or mineral acids facilitate the reaction by activating the carboxylic acid, enabling nucleophilic attack by the alcohol. The reaction mixture is often subjected to heat and the removal of water to drive the equilibrium toward ester formation. After synthesis, purification steps such as distillation or solvent extraction may be used to isolate the ester at the desired purity level. For flavor applications, specifications often include criteria for assay (minimum percentage of the ester), acid value, and the absence of contaminants that could affect flavor or safety. Food-grade production of aromatic esters like benzyl trans-2-methyl-2-butenoate requires adherence to good manufacturing practices (GMP) and chemical controls to ensure consistent quality. Industrial facilities producing such esters for flavor use will maintain documentation on raw material sources, reaction parameters, purification protocols, and quality control measures. Testing for identity and purity is critical, and techniques such as gas chromatography or infrared spectroscopy may be employed. Due to its specific sensory characteristics, the compound may be tailored to meet flavor industry needs, with blending into carriers or flavor bases for easier incorporation into final products. It is important to emphasize that production methods and quality specifications may vary by manufacturer and jurisdiction, and regulatory oversight ensures that food-grade materials meet appropriate safety and purity benchmarks. In summary, BENZYL TRANS-2-METHYL-2-BUTENOATE is produced through controlled esterification, followed by purification and quality testing to achieve food-grade specifications. The choice of starting materials, catalysts, and purification methods all contribute to the final product’s suitability for flavor application.

Why It Is Used In Food

The use of BENZYL TRANS-2-METHYL-2-BUTENOATE in food formulations is driven by its capacity to modify and enhance flavor profiles in a way that complements other ingredients. In complex food and beverage systems, individual flavor molecules rarely work in isolation; instead, they interact synergistically to create nuanced sensory experiences that consumers associate with quality and specific taste attributes. This compound’s contribution is typically described as adding balsamic, earthy, and aromatic nuances that can round out or sharpen particular flavor notes. The presence of such esters in flavor mixtures helps achieve desired aromatic profiles, especially in food applications where subtle background notes can enhance overall consumer acceptance. Flavor enhancement in foods is a technical function rather than a nutritional one. Compounds like benzyl trans-2-methyl-2-butenoate are selected by flavorists to achieve specific olfactory and taste effects at very low concentrations. In practical terms, flavor enhancers contribute to depth, balance, and character in products ranging from savory snacks to beverages and baked goods. Their role is to support the primary flavor components and provide consistency across production batches. Another rationale for using this compound is its compatibility with diverse food matrices. While solubility in water may be limited due to its chemical structure, it can be effectively incorporated into flavor emulsions or alcohol-based flavor blends that disperse well in finished products. Its stability under typical processing conditions, such as mixing and moderate heat, makes it useful in applications where complex flavor delivery is required without degradation. In addition to sensory contributions, the selection of any flavoring agent involves consideration of regulatory acceptance and safety data. Expert panels assess compounds for safety when used at intended levels to ensure they do not pose undue risk to consumers. BENZYL TRANS-2-METHYL-2-BUTENOATE’s inclusion in flavor libraries and evaluations by scientific panels supports its use within defined conditions, aligning technical functionality with safety expectations. Ultimately, the decision to include such agents in formulations is informed by sensory goals, formulation requirements, and regulatory compliance, all of which contribute to delivering a consistent and appealing product to consumers.

Adi Example Calculation

The following illustrates how ADI concepts would be applied in a hypothetical context, and it is intended for explanatory purposes only. For example, if an expert body were to establish an ADI of 5 mg per kilogram of body weight per day for a flavoring compound (hypothetical for explanation), a person weighing 70 kilograms (approximately 154 pounds) would have an ADI of 350 mg per day. This means that consuming up to 350 mg of that compound daily over a lifetime would be considered consistent with safety assessments. In reality, many flavoring agents are used in amounts that result in actual dietary exposure far below typical ADIs because they are effective at low concentrations. Such illustrative calculations help contextualize how safety margins are considered, but they are not specific recommendations for consumption. Actual intake of compounds like benzyl trans-2-methyl-2-butenoate through food would depend on the types of products consumed and the levels at which the compound is used in those products. It is crucial to emphasize that the example above uses a hypothetical ADI value for illustration and does not reflect an established ADI for this compound. Regulatory evaluations may conclude that no numeric ADI is necessary if exposure is deemed safe at intended use levels. The purpose of such examples is to help consumers and stakeholders understand how ADIs function as part of broader safety assessments rather than to provide specific intake advice.

Safety And Health Research

Safety and health research surrounding BENZYL TRANS-2-METHYL-2-BUTENOATE primarily stems from its evaluation by expert food safety bodies rather than large-scale clinical investigations. When expert panels assess flavoring agents, the focus is on toxicological endpoints relevant to typical dietary exposures. These evaluations consider data such as acute toxicity, subchronic effects, and any evidence of genotoxicity or reproductive toxicity, drawing from available studies and structural analog information. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) evaluated this compound within the context of flavoring agents and concluded that it presents no safety concern at current levels of intake when used as a flavoring agent. This type of assessment relies on a body of evidence that demonstrates low toxicity at the concentrations typical of flavor use. Such expert evaluations aim to identify whether a compound might pose risks such as organ toxicity or carcinogenicity when consumed at expected levels in food. Notes: Detailed numeric toxicity endpoints beyond the general conclusion were not provided on the linked evaluation summary page. (世界卫生组织应用) Further research on structurally related benzyl derivatives suggests that certain compounds within this class have been studied for sensory irritation and other endpoints. For example, human patch testing in controlled settings has shown that some aromatic esters exhibit minimal irritation under specific conditions, contributing to understanding of dermal compatibility. However, these types of studies are not directly indicative of dietary safety but inform broader toxicological profiles. Notes: This type of data is general in nature and applies to compound groups rather than specific dietary outcomes. (科学直通车) Beyond formal expert evaluations, safety research may include structural and metabolic considerations. Esters like benzyl trans-2-methyl-2-butenoate are metabolized in part by esterases, enzymes that cleave esters into alcohol and acid components, which can then be further processed by common metabolic pathways. This metabolic perspective supports the evaluation of potential breakdown products and their relevance to human health. Overall, safety and health research indicates that, under typical conditions of use as a flavoring agent, this compound does not raise safety concerns according to expert evaluations. Continued monitoring and evaluation by food safety authorities ensure that updates to safety data or changes in usage patterns are considered in regulatory assessments.

Regulatory Status Worldwide

The regulatory status of BENZYL TRANS-2-METHYL-2-BUTENOATE varies by jurisdiction and depends on how flavoring agents are categorized and evaluated by food safety authorities. Internationally recognized expert committees and flavor inventories provide insight into how such compounds are assessed for safety when used in food. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated this compound as part of its flavoring agent evaluations. According to JECFA’s evaluation summary, BENZYL TRANS-2-METHYL-2-BUTENOATE (JECFA number 846) was assessed and considered to present no safety concern at levels of intake typical for flavor use. The evaluation, based on available toxicological data, supports its inclusion in flavoring agent specifications. Notes: The specific acceptable daily intake (ADI) value is not publicly enumerated on the linked summary page, and therefore no numeric ADI is provided here. In the European Union, flavoring substances are governed by EU regulations, which may assign E-numbers to approved additives. In the case of BENZYL TRANS-2-METHYL-2-BUTENOATE, no definitive E-number was identified in authoritative flavor additive databases. Thus, its regulatory approval in the EU remains unclear in the absence of explicit listing. National regulations beyond these regions may vary, with some countries or regions referring to JECFA evaluations or domestic safety assessments. Food producers should consult local regulatory frameworks to ensure compliance with specific use conditions and labeling requirements. Overall, regulatory status worldwide reflects scientific evaluation by expert bodies and inclusion in flavor inventories, with region-specific approvals and detailed conditions varying by jurisdiction.

Taste And Functional Properties

From a sensory perspective, BENZYL TRANS-2-METHYL-2-BUTENOATE is characterized by a complex aromatic profile that blends balsamic and earthy notes with hints of mushroom-like nuance. Such sensory descriptors are typical of specialized esters, which often provide background or accenting flavor components rather than dominant fruity or sweet notes. In practical flavor design, this compound’s aromatic qualities can enhance or deepen other flavor elements, contributing to richer and more layered sensory experiences. The sensory impact is detectable at low concentrations, making it useful for fine-tuning food and beverage applications without overwhelming the overall profile. Functionally, esters like benzyl trans-2-methyl-2-butenoate typically exhibit limited solubility in water but are more soluble in organic phases or alcohol-based carriers. This behavior influences how the compound is incorporated into formulations. For example, flavorists often create concentrated flavor blends in suitable carriers that disperse uniformly in finished products, ensuring consistent distribution of the aromatic molecules. Solubility considerations also affect how the compound interacts with other ingredients; emulsifiers or solvents may be used to facilitate integration into aqueous systems. Stability is another important functional property. While many flavor compounds can degrade under heat or extended storage, esters often exhibit reasonable stability under typical processing conditions. This means they can withstand mixing, mild heating, or exposure to air without significant loss of sensory functionality. However, absolute stability limits depend on the specific food matrix and processing conditions, and flavorists design formulations with these factors in mind. In terms of sensory contribution, the aromatic characteristics of benzyl trans-2-methyl-2-butenoate can enhance savory, baked, or complex beverage profiles where nuanced depth is desired. Such compounds are not usually the primary source of flavor but serve to round out and complement the dominant taste notes provided by other ingredients. Their impact is subtle but meaningful in achieving a balanced and appealing flavor system. Overall, the taste and functional properties of this ingredient make it valuable in tailored flavor applications, where precise sensory effects are needed at controlled use levels.

Acceptable Daily Intake Explained

Acceptable Daily Intake (ADI) is a regulatory concept used by food safety authorities to indicate the amount of a substance that can be consumed daily over a lifetime without appreciable health risk. For flavoring agents like BENZYL TRANS-2-METHYL-2-BUTENOATE, expert bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) assess available toxicological data to determine whether typical intake levels require setting an ADI. In this case, JECFA’s evaluation concluded that the compound does not pose a safety concern at current intake levels when used as intended in flavor applications. The absence of a numeric ADI on authoritative summary pages means that an explicit value was not assigned in the available public summary documents. Regulators use the ADI concept as a risk management tool. It is derived from toxicological studies, often conducted in laboratory animals, that identify the highest exposure level at which no adverse effects are observed. Safety factors are then applied to account for interspecies differences and human variability, resulting in an ADI that is considered protective for all consumers, including sensitive subgroups. When a compound is determined to have no safety concern at estimated intake levels, regulators may forgo setting a numeric ADI and instead rely on guidelines for use consistent with good manufacturing practices. It is important to clarify that the ADI is not a recommended or target daily intake for consumers. Instead, it provides a boundary for regulatory assessment and ensures that estimated exposures from food remain within a range considered safe based on scientific evidence. For flavoring agents used at very low levels, actual intake is usually a small fraction of any theoretical ADI, reflecting the minimal amounts needed to achieve desired sensory effects. When reading regulatory evaluations or specifications, absence of a numerical ADI for a compound does not imply it is unsafe; rather, it means that expert evaluators found no basis for concern with typical dietary exposure at intended use levels. In summary, acceptable daily intake is a foundational concept in food additive safety assessment. Although a specific numeric ADI for this compound is not presented in available summaries, authoritative evaluations indicate that it does not raise safety concerns at current levels of intake as a flavoring agent.

Comparison With Similar Additives

Flavoring agents encompass a broad group of compounds used to create or enhance sensory experiences in food and beverage products. BENZYL TRANS-2-METHYL-2-BUTENOATE can be compared with other ester-based flavoring agents that provide aromatic complexity. One comparator is benzyl acetate, another ester frequently used in flavor formulations. Benzyl acetate is known for its sweet, fruity profile, often imparting jasmine or fruity notes in flavor blends. While benzyl acetate delivers a more overtly sweet aromatic, benzyl trans-2-methyl-2-butenoate contributes more balsamic and earthy tones. Both are esters and share certain chemical behavior, such as solubility characteristics and metabolic pathways, but they serve different sensory functions in formulations. Another example is ethyl butyrate, a widely used ester with prominent fruity notes reminiscent of pineapple or tropical fruits. Ethyl butyrate is used in beverages and confections to deliver strong, recognizable fruit character. In contrast, benzyl trans-2-methyl-2-butenoate operates at a subtler sensory level, supporting complexity rather than dominating a flavor profile. Methyl salicylate, known for its minty aroma, provides an example of how ester functional groups can yield distinct sensory experiences. While methyl salicylate’s primary application might be in mint-flavored products, benzyl trans-2-methyl-2-butenoate is leveraged for its balsamic and nuanced aromatic contributions. Comparisons with these and other flavoring agents highlight how diverse esters function within the sensory landscape. Flavorists select specific agents based on desired notes, the product matrix, and compatibility with other ingredients. Understanding these functional differences helps explain why multiple esters are used in concert to achieve balanced and appealing flavor profiles in foods and beverages.

Common Food Applications Narrative

In the food and beverage industry, flavoring agents are essential tools that help producers deliver consistent, appealing sensory experiences across a wide range of products. BENZYL TRANS-2-METHYL-2-BUTENOATE, with its distinct aromatic character, finds application in niche and complex flavor formulations rather than in mainstream bulk ingredients. It contributes to the background aromatic structure of select products where nuanced flavor layering is desired. In beverage applications, especially those with rich or layered profiles, such esters can support fruit, spice, or botanical notes. For example, in certain specialty drinks, subtle balsamic or earthy nuances can enhance the perception of complexity, particularly in blends that emphasize natural or artisanal character. While this compound is not a primary flavoring in sweet beverages, it may be part of flavor blends designed by flavorists to achieve specific sensory goals. In savory food products, background aromatic esters help round out flavor profiles that might otherwise lack depth. For instance, in snack seasonings or savory sauces, nuanced esters can complement primary savory notes to create a more satisfying overall perception. Such use cases often occur at low inclusion levels, consistent with the role of the compound as an enhancer rather than as a dominant tasting note. Baked goods and confectionery products also benefit from tailored flavor blends. In these contexts, the compound contributes to the richness of flavor without masking primary sweet or spice elements. Its integration into comprehensive flavor blends helps achieve a balanced sensory experience that remains consistent across batches. Specialty culinary applications, such as gourmet sauces, complex dressings, or artisan food products, may leverage the nuanced aromatic properties of benzyl trans-2-methyl-2-butenoate to evoke sensory qualities reminiscent of natural or aged ingredients. Here, its presence supports creative flavor development rather than serving a broad mass-market need. Overall, the common food applications of this flavoring agent reflect its specialized role in enhancing aromatic complexity in selected formulations, contributing to consumer-perceived quality in foods and beverages that rely on layered and sophisticated flavor profiles.

Safety & Regulations

FDA

  • Notes: A specific FDA food additive regulation listing was not identified in authoritative sources; included in flavor inventories evaluated by expert panels with use under good manufacturing practice.

EFSA

  • Notes: No explicit EFSA E-number or ADI value was identified in available authoritative sources.

JECFA

  • Notes: JECFA evaluated the compound and concluded no safety concern at current intake levels; a numeric ADI and year of evaluation are not explicitly shown on the public summary page.

Sources

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