ALLYL PHENYLACETATE

CAS: 1797-74-6 FLAVORING AGENT OR ADJUVANT

Allyl phenylacetate is a synthetic flavoring agent permitted under US regulations as a flavoring substance; it has been evaluated internationally and is generally considered safe at current use levels.

What It Is

Allyl phenylacetate is a synthetic organic flavoring agent of the ester class used to impart or modify flavor profiles in food and beverage products. It is identified chemically by the CAS number 1797-74-6. The structure of this compound consists of an allyl group esterified with phenylacetic acid, placing it within a broader group of aroma chemicals used in formulations that aim to deliver fruity, floral, or honey-like sensory characteristics in finished food products. This compound is typically a colorless liquid with a characteristic odor profile that food technologists describe as consistent with sweet, fruity, or honey notes. The designation of this additive falls under the technical function category of flavoring agent or adjuvant, indicating its use is primarily to enhance or support the flavor of a food product rather than contribute nutritional value or preserve it. The flavoring agent category of additives encompasses a wide array of compounds that interact with olfactory receptors and taste perception to deliver desired sensory outcomes. Allyl phenylacetate’s inclusion in regulatory lists, such as the US Code of Federal Regulations for synthetic flavoring substances and adjuvants, reflects historical assessments by food safety authorities that have identified its utility in food applications and established conditions under which it may be used. Because it is not naturally occurring in significant amounts in foods, allyl phenylacetate typically enters the food supply through intentional addition by flavorists or manufacturers seeking specific flavor outcomes. In summary, allyl phenylacetate is a defined, regulated flavoring compound with a specific chemical identity and role in food formulation, primarily used by industry professionals to achieve particular flavor characteristics in processed foods and beverages.

How It Is Made

Allyl phenylacetate is manufactured by organic chemical synthesis methods typical of ester formation reactions. The primary route involves the esterification of phenylacetic acid with allyl alcohol under conditions that promote the formation of the ester linkage while minimizing side reactions. In industrial practice, this reaction may be catalyzed by an acid catalyst and carried out under controlled temperature and solvent conditions to optimize yield and purity. After synthesis, the raw ester mixture is typically purified through standard organic chemistry techniques such as distillation or solvent extraction to achieve high purity suitable for use in flavor applications. The final product is often characterized by analytical methods such as gas chromatography to confirm composition and ensure absence of undesired by-products. Manufacturers producing this compound for food use will follow good manufacturing practices and may generate documentation such as certificates of analysis to demonstrate that the product meets defined quality criteria. The production of allyl phenylacetate in commercial settings emphasizes control of process parameters and chemical inputs to yield a consistent compound that meets regulatory specifications and functional performance requirements. This high-level overview reflects general chemical synthesis principles and does not imply specific proprietary methods used by individual producers.

Why It Is Used In Food

Allyl phenylacetate is used in food because it contributes specific sensory attributes that are valued in consumer products. Flavor chemists incorporate this compound into flavor blends to deliver or enhance sweet, fruity, honey-like, or floral nuances that are difficult to achieve with natural ingredients alone. Because modern food formulations often rely on precise and reproducible sensory profiles, synthetic flavoring agents like allyl phenylacetate offer predictable performance in conjunction with other flavor components. The use of this compound is driven by its ability to complement other flavor molecules and support the overall sensory experience of products such as confectionery, baked goods, beverages, and dairy analogs. Its relatively stable nature under typical processing conditions allows formulators to incorporate it into mixtures that undergo heat or other manufacturing stresses without significant loss of effect. The regulatory framework in which it exists permits its use in food formulations provided that it is used at the minimum level necessary to achieve the intended flavor effect, consistent with principles of good manufacturing practice. In the context of product development, allyl phenylacetate provides a tool for achieving nuanced taste profiles. It is not a bulk ingredient but rather a component selected for specific sensory contributions and functional compatibility with other ingredients in a formula.

Adi Example Calculation

Because a numeric acceptable daily intake (ADI) has not been established for allyl phenylacetate in formal regulatory evaluations, illustrative calculations focus on understanding exposure relative to typical use levels. For example, if a flavored beverage contains a flavor blend with allyl phenylacetate present at microgram-per-liter levels, and an adult consumes one liter of that beverage, the intake of allyl phenylacetate would be correspondingly low when compared with exposure levels considered in safety evaluations. This type of illustrative calculation demonstrates how actual dietary exposure from flavoring agents tends to be orders of magnitude lower than doses associated with toxicological effects in experimental studies, supporting the regulatory conclusion of no safety concern at current use levels.

Safety And Health Research

Safety evaluations of flavoring agents like allyl phenylacetate consider available toxicological data, exposure estimates, and the context of use in food products. Joint FAO/WHO evaluations, such as those maintained in the JECFA database, provide a summary of expert assessment for this compound, noting that at current use levels there is no safety concern identified. Such evaluations are typically based on a review of animal toxicology data, metabolism studies, and estimated dietary exposure from typical applications. Regulatory assessments focus on the margin between estimated human exposure and levels at which potential adverse effects are observed in experimental systems, applying conservative uncertainty factors to ensure consumer safety. Because flavoring agents are used at relatively low levels and are not intended to contribute nutrients or pharmacological effects, assessments emphasize that their inclusion in food formulations does not meaningfully increase risk when used as part of good manufacturing practice. Consumers encounter such compounds in a variety of flavored products, but the available evidence supports that, under regulated conditions of use, allyl phenylacetate does not pose a safety concern. Continued monitoring of toxicological data and post-market surveillance by regulatory agencies ensures that any new findings can be incorporated into safety assessments as needed.

Regulatory Status Worldwide

In the United States, allyl phenylacetate is listed under the group of synthetic flavoring substances and adjuvants that may be safely used in food when employed in accordance with good manufacturing practice. This listing appears in the US Code of Federal Regulations under the section that addresses synthetic flavoring substances and adjuvants, indicating that its use as a flavoring agent is permitted under those regulatory criteria (21 CFR 172.515). The regulatory status reflects that the compound is recognized in a specific category of permitted flavoring agents and is not prohibited when used as specified by the regulation. Internationally, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated allyl phenylacetate as a flavoring agent and concluded that it does not present a safety concern at current levels of intake when used as intended in food applications. This evaluation was conducted as part of a broader review of flavoring substances and is referenced in the WHO JECFA database, which assigns a specific evaluation number to this compound. These types of international assessments support the understanding of safety and inform national and regional regulatory frameworks. Other regulatory bodies and flavoring assessment organizations maintain inventories or databases of flavoring agents, and allyl phenylacetate appears in such lists with reference to its functional class and use conditions. Where specific numeric use limits or conditions are established, these are generally consistent with the principle that the compound be used at levels necessary to achieve the intended sensory effect.

Taste And Functional Properties

Allyl phenylacetate is recognized by food scientists and perfumers for delivering a sensory profile that is sweet and fruity with honey-like undertones. When incorporated into flavor blends, it can augment or emphasize particular aromatic characteristics that enhance the overall flavor impression of a food product. Its solubility properties—being miscible with organic solvents and compatible with other flavoring compounds—make it a versatile component within complex mixtures. Because this compound is an ester, it tends to exhibit volatility that contributes to aroma perception during consumption. Such volatility must be balanced in formulation to ensure that the compound is present at levels that contribute to flavor without overpowering other components. Sensory quality assessments typically guide the levels used in a given recipe. In addition to sensory attributes, functional considerations such as stability under processing conditions, compatibility with packaging materials, and minimal contribution to off-notes at recommended use levels are important. The degree to which allyl phenylacetate maintains its character in the presence of heat, pH changes, or interactions with other ingredients influences its selection and use in specific product categories. These functional properties are part of why flavor chemists value this compound in tailored applications.

Acceptable Daily Intake Explained

Acceptable daily intake (ADI) is a risk assessment concept used by food safety authorities to express the amount of a substance that can be consumed on a daily basis over a lifetime without appreciable health risk. In the case of many flavoring agents, including allyl phenylacetate, international evaluations have concluded that typical intake levels from foods are sufficiently low that a numerical ADI is not established or expressed, and instead the compound is considered of no safety concern at current levels of intake when used as intended. This approach reflects an understanding that exposure from flavoring agents is generally limited by usage levels in formulations and the principle of good manufacturing practice, which calls for use at the minimum level necessary to achieve the desired effect. The lack of a specified numeric ADI does not imply unlimited use; rather, it indicates that exposure under normal conditions of use falls well below levels that would raise safety concerns in toxicological assessments.

Comparison With Similar Additives

Flavoring agents such as allyl phenylacetate, ethyl acetate, and methyl salicylate share functional roles in food and beverage formulations by contributing specific sensory attributes. Ethyl acetate provides a fruity aroma and is used in a variety of applications where a light, fruity note is desired, often at low use levels due to its volatility. Methyl salicylate, with a characteristic wintergreen aroma, is another example of a flavoring ester that delivers distinctive sensory impacts but requires careful control in formulations to avoid overpowering effects. Compared with these examples, allyl phenylacetate delivers sweet, honey-like, and floral nuances that complement but are distinct from the profiles of other esters. The selection of one compound over another in a flavor blend depends on the specific sensory outcome desired by the formulator, as well as considerations of stability, volatility, and interaction with other ingredients. Such comparisons help flavor chemists choose appropriate combinations of compounds to achieve balanced and appealing sensory profiles in consumer products.

Common Food Applications Narrative

Allyl phenylacetate finds application across a range of food categories where specific sensory effects are desired. In confectionery products such as candies and sweets, this compound can contribute to sweet, honey-like, or fruity nuances that complement sugar and other flavor building blocks. Within baked goods, it may be used in flavor blends designed for fruit or dessert notes, supporting the overall aromatic profile of finished products. Beverage applications, including nonalcoholic fruit drinks and flavored waters, can also benefit from the subtle aromatic contributions of allyl phenylacetate when paired with other natural and synthetic flavor ingredients. In dairy analogs and other flavored milk products, the compound’s fruity and floral characteristics can help achieve profiles reminiscent of fruit-infused or dessert-flavored beverages. The formulation of certain snack foods and breakfast cereals sometimes incorporates compounds like allyl phenylacetate within broader flavor matrices aimed at delivering memorable taste experiences. Although it is not a primary ingredient, it plays a supportive role in achieving targeted sensory outcomes. Its inclusion in food flavor profiles demonstrates how individual aroma chemicals are selected and blended by food technologists to satisfy consumer expectations for taste and aroma across diverse product lines.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: No specific EFSA evaluation identified for numeric ADI

JECFA

  • Year: 1996
  • Notes: JECFA concluded no safety concern at current intake levels

Sources

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