AMYL HEPTANOATE

CAS: 7493-82-5 FLAVORING AGENT OR ADJUVANT

Amyl heptanoate is a synthetic flavoring agent used to impart fruity and ethereal notes in food and beverage applications and is regulated as a flavoring substance under US food additive rules.

What It Is

Amyl heptanoate is a chemical compound belonging to the class of esters that are widely used in the flavor and fragrance industry. It is an aliphatic ester formed from heptanoic acid and amyl alcohol, and it is recognized for its strong fruity, ethereal odor and taste characteristics. In the context of food and beverage applications, amyl heptanoate functions as a flavoring agent or flavor adjuvant, meaning it contributes to or modifies the flavor profile of consumable products. Its inclusion in formulations is typically at low levels to enhance or simulate fruit-like sensory attributes. Chemically, amyl heptanoate is identified by its CAS number 7493-82-5, which uniquely distinguishes it in chemical registries and regulatory documents. This ester is sometimes referenced by alternative names that reflect its chemical structure or derivation, such as pentyl heptanoate or heptanoic acid pentyl ester. While not assigned an official International Numbering System (INS) code as a direct food additive, related regulatory and flavor industry inventories include identifiers such as the FEMA GRAS (Generally Recognized as Safe) number 2073 for this ingredient, which relates to expert review of its safety for use in foods and beverages. The sensory impact of amyl heptanoate is largely driven by its ability to impart fruity notes reminiscent of unripe banana, coconut, or citrus nuances, making it useful in a range of flavor formulations.

How It Is Made

The synthesis of amyl heptanoate typically involves an esterification reaction between heptanoic acid and an alcohol known as amyl or pentyl alcohol. This reaction can be catalyzed by acidic catalysts under controlled conditions to promote the formation of the ester bond and minimize side products. The esterification process is a common method for preparing organic esters in industrial settings and can be conducted at elevated temperatures with careful control of reactant ratios and catalysts to optimize yield. In commercial operations, the resulting amyl heptanoate is purified to food-grade specifications through distillation and other refining techniques to remove unreacted starting materials, catalysts, and other impurities. Food-grade quality control ensures that the final product meets criteria for clarity, sensory purity, and safety for intended use in flavor applications. Specifications for food-grade flavoring compounds often include physical property measures such as refractive index, density, and sensory thresholds, although these specific values are typically provided in technical data sheets rather than regulatory texts. The production of amyl heptanoate for food use is subject to good manufacturing practice (GMP) principles, which include stringent controls on raw materials, process conditions, and post-synthesis purification. The goal of such controls is to produce a consistent flavoring ingredient that is stable, free from harmful contaminants, and suitable for incorporation into consumer food products under regulatory allowances where applicable. Manufacturers of flavor compounds may also conduct independent sensory and stability testing to characterize the performance of amyl heptanoate in various formulation matrices.

Why It Is Used In Food

Amyl heptanoate is utilized in food formulations primarily because of its ability to impart or enhance fruity flavor attributes. Many flavor profiles designed for beverages, confectionery, baked goods, dairy desserts, and other processed foods benefit from esters that convey pleasant sensory impressions of fruit. The ester’s characteristic odor and taste contribute to flavor complexity that can mimic or support natural fruit flavors, enabling product developers to achieve desirable sensory outcomes in a consistent and scalable way. Flavoring agents such as amyl heptanoate are selected based on their sensory impact, compatibility with other ingredients, and stability under processing conditions. In many formulations, amyl heptanoate works synergistically with other flavoring compounds to balance sweetness, acidity, and aromatic complexity. Its use allows manufacturers to fine-tune product taste profiles in a way that aligns with consumer expectations for fruit-flavored or fruit-enhanced products. Beyond taste enhancement, the use of synthetic flavoring agents like amyl heptanoate can offer advantages in terms of consistency, cost, and supply reliability compared with exclusive reliance on natural extracts. Because natural fruit extracts can vary in composition due to seasonal, varietal, and processing differences, synthetic flavor ingredients provide predictable performance. In applications where a specific fruit note is desired without reliance on variable raw botanical materials, amyl heptanoate can serve as a reliable component of the flavor formulation.

Adi Example Calculation

To illustrate how an acceptable daily intake (ADI) concept might apply in a hypothetical scenario, imagine a flavoring compound with an assigned ADI of X mg per kg of body weight per day. If an adult weighing 70 kilograms were to consume this flavoring at the ADI level every day, their total daily intake would be calculated as X multiplied by 70. For example, if the ADI were 1 mg/kg, the total permissible daily intake would be 70 mg for that individual. This calculation is illustrative and assumes a numeric ADI that is not specifically assigned to amyl heptanoate by some expert panels. In practice, flavoring agents are used at concentrations far below levels associated with toxicological concern, and actual daily intake estimates for consumers are generally orders of magnitude lower than hypothetical ADI thresholds. Regulatory evaluations consider typical use levels, dietary patterns, and exposure data to inform safety conclusions. The key takeaway from such calculations is that ADIs provide a context for interpreting safety margins. They are derived using established scientific methods and conservative assumptions to protect public health. When a flavoring compound is determined to have no safety concern at expected intake levels, the emphasis shifts to ensuring it is used in compliance with regulatory conditions and good manufacturing practice rather than monitoring daily intake relative to a numeric ADI.

Safety And Health Research

Safety evaluations for flavoring agents like amyl heptanoate focus on toxicological data, exposure assessments, and expert review of available studies. Agencies and expert panels examine information on metabolism, acute toxicity, subchronic studies, and other relevant endpoints to assess whether the compound raises safety concerns at levels consistent with intended use in food products. Flavoring esters are typically evaluated within structural classes, and conclusions are drawn about safety based on collective data for related compounds. The FEMA Expert Panel’s GRAS determinations for flavoring ingredients are based on a review of scientific information, including chemical identity, metabolic fate, and exposure estimates. These evaluations help inform regulatory inventories and guide manufacturers in the use of flavoring agents. Additionally, JECFA evaluations provide international context for safety assessments. For amyl heptanoate in particular, summaries of expert committee findings indicate that it is acceptable with no safety concern at current levels of intake when used as a flavoring agent. Research into specific health outcomes for individual flavoring compounds is limited in the public literature, as regulatory assessments rely on established toxicological principles, structural considerations, and historical usage data. Where data gaps exist, expert panels often use conservative assumptions and read-across approaches from similar compounds to ensure safety margins are maintained. The focus of these assessments is to ensure that typical dietary exposure to flavoring agents like amyl heptanoate remains well below levels associated with adverse effects in controlled studies.

Regulatory Status Worldwide

In the United States, amyl heptanoate is listed among synthetic flavoring substances and adjuvants that are permitted for direct addition to food when used in accordance with good manufacturing practice, under Title 21 Code of Federal Regulations (CFR) Section 172.515. This regulatory provision enumerates flavoring substances that may be safely used in food production at levels sufficient to achieve their intended effect, consistent with longstanding safe use principles. The inclusion of amyl heptanoate in this list reflects an evaluation of its safety for use as a flavoring agent under typical conditions of use in food formulation and has been maintained through amendments to the regulation over time. The regulatory text specifies that these substances must be used in minimum quantities to achieve their intended effect and conform to good manufacturing practice requirements as outlined in the CFR. Amyl heptanoate is also recognized in the Flavor and Extract Manufacturers Association (FEMA) Flavor Ingredient Library with a FEMA GRAS reference number, indicating that expert panels have reviewed its safety and concluded it is generally recognized as safe under intended conditions of use. This review is submitted to and maintained in inventories such as the FDA Substances Added to Food Inventory, which provides a public record of substances evaluated for use in foods. Internationally, evaluations by organizations like the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have addressed flavoring agents including amyl heptanoate. While explicit acceptable daily intake values are not always assigned for every flavoring compound, JECFA’s assessments often conclude that substances like amyl heptanoate present no safety concern at current levels of intake based on available data and typical use patterns. Regulatory approaches vary by region, and many jurisdictions align with or reference evaluations by expert bodies such as FEMA and JECFA when determining allowable uses of flavoring agents in food applications.

Taste And Functional Properties

Amyl heptanoate is known for its fruity, ethereal, and slightly banana-like sensory characteristics when perceived through smell and taste. These properties make it suitable for use in flavor blends that aim to evoke fruit-like impressions. The sensory qualities of this ester arise from its molecular structure, which interacts with olfactory receptors associated with fruity aromas. In terms of functional properties, amyl heptanoate exhibits limited water solubility but is readily dispersed in oil-based and ethanol-containing flavor systems. Its solubility profile influences how it is incorporated into different products; for example, in aqueous beverages, it may be delivered through emulsification or co-solvent strategies to achieve uniform distribution. Stability under typical food processing conditions such as moderate heat and pH variations is generally adequate for its flavoring role, although extreme processing conditions may degrade volatile esters or alter their sensory attributes. The balance between volatility and persistence is an important functional aspect of many flavoring esters. Amyl heptanoate’s volatility contributes to its ability to deliver aroma during consumption, while its retention in the product matrix ensures lasting flavor perception. Sensory professionals evaluating flavor ingredients often consider threshold levels—concentrations at which a compound’s aroma becomes detectable—to guide formulation decisions. The distinctive taste and odor of amyl heptanoate make it a valuable component in flavor palettes designed for products seeking clean, fruity notes.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) represents an estimate of the amount of a substance in food or drinking water that can be consumed daily over a lifetime without appreciable health risk. ADIs are typically expressed relative to body weight and are derived by expert panels based on available toxicological data, applying safety factors to account for uncertainty. For many flavoring agents, including amyl heptanoate, explicit numeric ADI values may not be assigned if data do not indicate safety concerns at estimated levels of dietary exposure. In regulatory evaluations, if no safety concern is identified at current intake levels based on comprehensive reviews of metabolic pathways and toxicological endpoints, expert committees may conclude that the use of a flavoring compound is acceptable without specifying a numeric ADI. This reflects confidence that normal usage patterns do not pose a risk to consumers when the compound is used in accordance with good manufacturing practice. In such cases, the absence of a numeric value does not imply a lack of safety assessment but rather that available evidence supports safety under typical conditions of use. For consumers and professionals interpreting regulatory information, it is important to understand that ADIs serve as precautionary benchmarks rather than recommended consumption targets. Flavoring agents are used at very low concentrations in food products, and exposure is generally much lower than thresholds of toxicological concern. Regulatory inventories and expert panel evaluations provide assurances that such compounds can be incorporated into food products without undue health risk when used appropriately.

Comparison With Similar Additives

Flavoring esters such as amyl heptanoate share structural and functional similarities with other aliphatic esters used in food flavor applications. Compounds like ethyl butyrate, ethyl hexanoate, and isoamyl acetate are all esters that contribute fruity or sweet sensory characteristics. While each ester has a unique odor profile, they are often selected based on the specific fruit note desired in a product. For instance, ethyl butyrate may be associated with pineapple-like notes, while isoamyl acetate is often described as banana-like. In contrast, amyl heptanoate’s sensory profile includes ethereal fruity notes that can complement a range of fruit-flavored products. Functionally, these esters exhibit limited water solubility and are typically incorporated through co-solvents or encapsulation techniques to achieve uniform flavor distribution. Their volatility and stability under processing conditions influence how they are used in beverage versus confectionery applications. Sensory scientists consider threshold concentrations and interactions with other flavor components to balance the overall taste experience. From a regulatory perspective, many of these esters are included in flavoring inventories such as 21 CFR 172.515 and FEMA’s GRAS lists, indicating a history of evaluated use in food products. Their inclusion signifies that regulatory authorities and expert panels have reviewed data supporting their safe use under defined conditions. Comparing amyl heptanoate with similar additives highlights the broader class of flavor esters and the considerations involved in selecting specific compounds to achieve targeted sensory effects in food formulations.

Common Food Applications Narrative

Amyl heptanoate finds application across a range of food and beverage categories where fruit-like aromas and flavors are desired. In beverage production, it is used as part of complex flavor blends for soft drinks, fruit-flavored waters, and ready-to-drink beverages to contribute to a bright, ethereal fruit character. In confectionery, this ester can enhance gummies, hard candies, and fruit chews with fruity notes that complement sugar and other flavor ingredients. The inclusion of amyl heptanoate in dessert products, such as frozen novelties or gelatin-based desserts, adds depth to fruit profiles without overwhelming other taste elements. In bakery products, flavor developers may incorporate amyl heptanoate into fillings, icings, and fruit-flavored batters to achieve a pronounced and appealing fruit aroma. Its use in dairy applications, such as flavored yogurts or dairy beverages, helps to create a sensory experience aligned with consumer expectations for fruit-enhanced products. The ester may also be used in savory applications where a subtle fruity top note can balance acidity or other flavor components. Across these product types, the concentration of amyl heptanoate is carefully calibrated to align with regulatory conditions of use and consumer sensory preferences. Formulators often blend this ester with other flavoring agents to achieve nuanced and well-rounded profiles. Because of its potency and distinctive character, relatively low levels of amyl heptanoate are typically sufficient to achieve the desired sensory impact. Manufacturers consider sensory testing and analytical measures when deciding on inclusion rates to ensure flavor consistency across batches.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: No specific EFSA evaluation or E number assignment found

JECFA

  • Notes: JECFA evaluation concluded acceptable use with no safety concern; no numeric ADI explicitly listed

Sources

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