CINNAMYL ACETATE

CAS: 103-54-8 FLAVORING AGENT OR ADJUVANT

CINNAMYL ACETATE is a synthetic flavoring agent and adjuvant commonly used to impart floral, fruity, and balsamic notes in food flavoring systems. On regulatory lists, it appears under the FDA synthetic flavoring substances and adjuvants provisions, and it has been evaluated by international expert bodies for use as a flavoring.

What It Is

Cinnamyl acetate is a synthetic organic compound used as a flavoring agent or adjuvant in food formulations. Chemically it is an ester derived from cinnamyl alcohol and acetic acid, and it carries the CAS Registry Number 103-54-8, which uniquely identifies it in chemical and regulatory databases. As a flavoring agent, cinnamyl acetate contributes aromatic characteristics that are described in sensory literature as floral and fruity, fitting into flavor profiles that include cinnamon, honey, or balsamic nuances. It is listed in regulatory references such as 21 CFR 172.515 under U.S. FDA food additive regulations for synthetic flavoring substances and adjuvants, indicating that under U.S. law it is permitted for use in foods when used in accordance with good manufacturing practice. The term "adjuvant" here refers to its technical role in enhancing or modifying flavor characteristics in combination with other flavor constituents. This compound is part of a broader class of esters used in the flavor and fragrance industry, where structural variations on the basic ester backbone influence sensory properties and functional behavior in complex food matrices. Beyond food, cinnamyl acetate is also used in fragrances and perfumery for its pleasant scent characteristics. When used in food, it is subject to regulatory controls that stipulate conditions around the quantity and circumstances under which it can be added to food products. Because it is synthetically produced for commercial use, cinnamyl acetate must meet purity specifications typical for flavoring agents, and its safety and efficacy have been assessed by regulatory bodies and expert panels around the world. These assessments consider toxicology, metabolism, and use levels to ensure human exposure remains within acceptable bounds for flavoring substances.

How It Is Made

Cinnamyl acetate is manufactured through chemical synthesis rather than extraction from natural sources. The primary industrial route involves esterification, where cinnamyl alcohol undergoes a reaction with acetic acid or an acetic acid derivative under controlled conditions. During this reaction, the hydroxyl group of the cinnamyl alcohol and the carboxyl group of the acetic acid combine, releasing water and forming the ester bond characteristic of cinnamyl acetate. This esterification process typically uses catalysts and reflux conditions to drive the reaction toward completion, and the resulting mixture is then purified to remove unreacted starting materials and by-products. After synthesis, the crude product is subjected to purification techniques such as fractional distillation or solvent extraction to achieve the high level of purity required for use in food flavor applications. Quality control measures ensure that the final product meets industry-standard specifications for flavoring compounds, focusing on purity, absence of contaminants, and consistency of sensory attributes. The flavor and fragrance industry often adheres to established compendial standards or internal specifications that reflect regulatory expectations for food-grade materials. Manufacturers operating in the food ingredients sector must comply with manufacturing practices that align with local and international regulations for food additives. These practices encompass not only chemical synthesis and purification but also documentation, traceability, and quality assurance to ensure that the produced cinnamyl acetate is suitable for addition to food products under regulatory frameworks. The final ingredient is typically a clear, colorless to pale yellow liquid with a characteristic sweet, floral odor that aligns with its desired flavoring application in food systems.

Why It Is Used In Food

Cinnamyl acetate is incorporated into food products to impart specific sensory qualities that augment or complement natural flavors. Its primary role as a flavoring agent or adjuvant is to deliver aromatic notes that can evoke floral, honey-like, or fruity impressions, which are desirable in a wide range of food applications. For example, when used in fruit-flavored beverages, candies, or baked goods, cinnamyl acetate can enhance perceived sweetness and complexity without adding caloric content itself, making it a versatile tool for flavorists designing appealing taste profiles. The compound’s effectiveness arises from its ability to interact with other flavor components to create a balanced and harmonious overall sensory experience. As an adjuvant, cinnamyl acetate may also modify the perception of other flavor molecules, smoothing transitions between different notes or supporting subtler flavor nuances. The decision to include this ingredient in a formulation often reflects a careful calibration of sensory outcomes, where technical expertise in flavor composition ensures that the final product meets consumer expectations for aroma and taste. Another reason cinnamyl acetate finds use in foods is its relatively low volatility and stability under typical processing conditions. While many flavoring compounds can be sensitive to heat or pH changes, cinnamyl acetate tends to retain its character through common manufacturing steps such as mixing, heating, or cooling. This stability allows flavorists to rely on consistent performance when formulating products that require prolonged shelf life or exposure to varying conditions during processing. Because consumer preference drives product development in the food industry, flavoring agents like cinnamyl acetate are selected for their ability to resonate with familiar sensory perceptions. Its inclusion helps manufacturers achieve specific taste narratives—such as enhancing fruitiness in beverages or reinforcing sweet-spice notes in confectionery—by complementing the natural profiles of other ingredients. This practical utility underpins its continued use in a variety of food categories, where regulatory frameworks permit its addition within bounds of good manufacturing practice.

Adi Example Calculation

To illustrate how acceptable daily intake (ADI) values are applied in a practical context, consider a hypothetical ADI of X milligrams per kilogram of body weight per day for a flavoring substance (note that this example uses a placeholder ADI because a specific numeric value for cinnamyl acetate was not confirmed from a regulatory deep link). If a 70‑kilogram adult consumes foods containing this flavoring and the total exposure amounts to Y milligrams per day, the intake relative to body weight would be calculated by dividing Y by 70. This result can then be compared to the ADI to assess whether exposure remains within safe bounds. For example, if Y were 1 milligram and the individual’s body weight is 70 kilograms, the intake would be approximately 0.014 milligrams per kilogram of body weight per day. If the hypothetical ADI were 1 milligram per kilogram of body weight per day, this exposure level would be well below the ADI, indicating a wide safety margin under typical consumption scenarios. Because flavoring agents are used in foods at very low concentrations, actual intake estimates often fall substantially below ADI values derived from toxicological assessments. Such illustrative calculations reinforce how ADIs serve as benchmarks for comparing exposure scenarios rather than targets for consumption. They help frame discussions around safety by quantifying the relationship between estimated intake and thresholds established from animal studies with applied safety factors. In practice, food scientists and regulators use detailed exposure assessments, considering consumption patterns across populations, to ensure that typical and high‑end intake levels remain within the bounds defined by ADIs or similar safety evaluations.

Safety And Health Research

Assessments of cinnamyl acetate’s safety in food applications focus on understanding its toxicological profile, how it is metabolized, and the levels at which human exposure occurs in typical use. Regulatory and scientific bodies consider data from studies that examine absorption, distribution, metabolism, and excretion of the compound to build a weight‑of‑evidence perspective on its behavior in biological systems. Such data help determine whether flavoring agents are rapidly broken down and eliminated, which is a key factor in assessing potential accumulation or adverse effects. Expert committees like JECFA review available toxicology data, including acute and subchronic studies in animal models, to evaluate whether there are indications of systemic toxicity at doses relevant to human dietary exposure. These evaluations also consider whether there are genotoxicity concerns or other endpoints, such as reproductive or developmental effects, that might warrant specific restrictions on use levels. JECFA’s historical summaries inform how compounds like cinnamyl acetate fit within broader assessments of structurally related flavoring substances, integrating multiple data streams to inform safety conclusions. In regulatory contexts, absence of specific safety concerns at typical intake levels is interpreted within frameworks that define acceptable exposure bounds for flavoring substances. Safety evaluations do not assume inherent risk at all exposures but characterize conditions under which use is considered safe based on toxicological margins compared to anticipated dietary intake. For flavoring agents used at relatively low levels, typical human exposure is often orders of magnitude below doses causing adverse effects in animal studies, which supports regulatory decisions that permit use under good manufacturing practice. The safety research landscape for flavoring agents also includes post‑market monitoring and scientific literature that track any emerging evidence related to human health outcomes. When new data arise, regulatory panels reassess existing conclusions to ensure that previously accepted uses continue to align with current scientific understanding. This iterative process of evaluation and re‑evaluation forms the foundation of ongoing safety research for food additives like cinnamyl acetate.

Regulatory Status Worldwide

In the United States, cinnamyl acetate is included under Title 21 of the Code of Federal Regulations, Part 172.515, which governs synthetic flavoring substances and adjuvants permitted for direct addition to food for human consumption. This provision allows synthetic flavoring agents, including cinnamyl acetate, to be used in food products provided they are employed in the minimum quantity necessary to achieve their intended effect and are incorporated in accordance with good manufacturing practice, which ensures safe and appropriate use during food production. The presence of cinnamyl acetate on this list reflects regulatory assessment that supports its use as a flavoring agent when these conditions are met, but it does not specify precise numerical limits for all potential applications, leaving quantitative judgment to manufacturers consistent with regulatory guidance. The FDA’s regulation underscores that such substances must be handled in a manner that maintains food safety and consumer protection. Internationally, cinnamyl acetate has been evaluated by expert panels that inform global food additive standards. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) maintains a database that includes information and historical evaluations of many flavor compounds, providing technical summaries, references, and links to specifications. While a specific numeric acceptable daily intake for cinnamyl acetate may not be publicly listed in the available JECFA database entry without deeper access, JECFA evaluations historically consider toxicological and exposure data to inform safety assessments for flavoring substances. In the context of the European Union, regulatory frameworks overseen by the European Food Safety Authority (EFSA) guide the authorization and re‑evaluation of flavoring substances within the food category system. EFSA’s expert Panel on Food Additives and Flavourings reviews toxicological and exposure data for a wide range of flavoring agents, including esters like cinnamyl acetate, and provides scientific opinions that support decision‑making on their safe use. While not every compound receives a distinct E number, flavoring substances that have undergone evaluation may be utilized in the EU according to conditions established under its flavoring regulations. The regulatory landscape underscores a global pattern in which competent authorities assess the safety and appropriate conditions of use for compounds such as cinnamyl acetate.

Taste And Functional Properties

Cinnamyl acetate exhibits sensory characteristics that align with its role as a flavoring agent. Sensory assessments describe its odor profile as floral and fruity, often with balsamic or honey-like notes that contribute to a perceptible sweetness in food applications. These flavor attributes make it suitable for enhancing profiles where such nuances are desired, particularly in formulations designed to evoke fruit or confectionery notes. The compound’s sensory impact is concentration-dependent, and flavorists calibrate use levels to achieve the intended effect without overwhelming other components in the flavor blend. From a functional standpoint, cinnamyl acetate displays moderate solubility in common food-grade solvents and organic phases. While its solubility in water is limited, it blends effectively with ethanol and other solvents used in flavor systems, facilitating its integration into beverages, syrups, and emulsions. Its chemical structure provides a balance between volatility and stability: it is sufficiently volatile to contribute aromatic perception but also stable enough to withstand typical food processing conditions such as heating or freezing, enabling its sensory characteristics to persist through manufacture and storage. Cinnamyl acetate’s performance in complex matrices depends on interactions with fats, sugars, and other flavor constituents. In emulsified systems, for example, its distribution can influence how the flavor is perceived by consumers, with interactions between the compound and the lipid phase affecting release dynamics during consumption. Similarly, its sweet and fruity undertones can complement natural sweeteners and other esters, allowing formulation specialists to design nuanced taste experiences. The functional properties of cinnamyl acetate extend beyond sensory contributions. Its presence in a flavor blend can influence the overall perception of balance, reinforcing desirable sensory cues while masking less favorable traits. For instance, in baked goods, its aromatic profile may elevate the perception of fruitiness or sweetness without increasing sugar content. Its compatibility with a range of other flavor molecules—esters, aldehydes, and alcohols—makes it a flexible component in multi-faceted flavor systems, supporting both the technical and aesthetic goals of food formulation.

Acceptable Daily Intake Explained

The concept of an acceptable daily intake (ADI) is central to the regulatory assessment of many food additives, including flavoring agents. An ADI represents an estimate of the amount of a substance in food or drinking water that can be ingested daily over a lifetime without appreciable health risk, based on toxicological data and factors of safety. For flavoring agents, which are often used at low levels, ADIs help regulators determine if typical exposure from food products falls well within safe bounds established through rigorous evaluation. In conducting ADI assessments, expert committees review studies that examine effects in laboratory animals at various doses. These studies identify a no‑observed‑adverse‑effect level (NOAEL) or a benchmark dose from which regulatory scientists apply uncertainty factors to account for inter‑species differences and variability among human populations. The resulting ADI is expressed as a milligram amount per kilogram of body weight per day, providing a quantitative reference that supports regulatory decision‑making and safety communication. For some flavoring agents, specific numeric ADIs are published when sufficient toxicological data are available. For others, including those evaluated by expert bodies such as JECFA and EFSA, summary conclusions may state that typical use levels do not raise safety concerns without explicitly stating a numeric ADI. In such cases, regulators rely on conservative exposure estimation approaches and the principle of good manufacturing practice to guide safe use. It is important to understand that an ADI is not a recommended intake level but rather a scientifically derived threshold that helps ensure consumer safety. Because flavoring substances are typically used at minute concentrations in food products, actual human exposure often remains far below the ADI, reinforcing the assessment that such compounds can be safely incorporated when applied according to regulatory guidance and within industry practices that prioritize safety.

Comparison With Similar Additives

Cinnamyl acetate belongs to a broader class of ester flavoring agents that are valued for their aromatic and sensory contributions in food formulations. Within this class, other compounds such as ethyl acetate, isoamyl acetate, and benzyl acetate also serve as flavoring agents with distinct sensory profiles. Ethyl acetate, for example, is known for its fruity and solvent‑like nuances and is commonly used in beverages and confectionery systems, whereas isoamyl acetate is associated with banana‑like notes that are effective in fruit flavor applications. Compared to these compounds, cinnamyl acetate offers floral and balsamic attributes that add complexity to flavor blends rather than dominating a single primary note. Structurally related esters like phenethyl acetate provide honey‑like and floral characteristics similar to cinnamyl acetate, but each compound’s subtle differences in molecular structure influence volatility and receptor interactions, resulting in nuanced sensory effects. Flavorists often select among these esters to achieve a balanced aromatic profile in a finished product, recognizing that even minor structural differences can shift perceived flavor from more sweet‑fruity to more floral or spicy. In terms of functional behavior, many ester flavoring agents share common properties such as moderate volatility and compatibility with organic phases, which support their integration into complex food matrices. However, differences in solubility and stability under processing conditions can influence which ester is preferred for a given application. For example, some esters may degrade or transform under high heat, altering sensory outcomes, while others remain stable and consistent through baking or freezing operations. The comparative assessment of additives extends to regulatory evaluations as well. Bodies that assess safety for flavoring agents often consider groups of structurally related compounds in collective evaluations, taking into account shared metabolic pathways and toxicological data. This group‑based approach can streamline safety assessments when compounds exhibit analogous behavior in biological systems, but it also highlights the importance of compound‑specific data to confirm individual safety profiles. In this context, cinnamyl acetate’s regulatory acceptance within frameworks such as FDA flavoring regulations reflects a broader pattern of evaluated ester flavoring agents that together contribute to the palette of sensory tools available to the food industry.

Safety & Regulations

FDA

  • Notes: Included under the FDA synthetic flavoring substances and adjuvants list for use in accordance with good manufacturing practice based on regulatory listing.
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: Specific numeric ADI not confirmed from d authoritative sources.

JECFA

  • Notes: JECFA evaluation exists but numerical ADI and year could not be extracted from the d database link without specific entry depth.

Sources

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