CINNAMYL FORMATE

CAS: 104-65-4 FLAVORING AGENT OR ADJUVANT

Cinnamyl formate is a synthetic flavoring agent used to impart cinnamon, fruity, and balsamic notes to food and beverage flavor formulations and is recognized in food additive inventories.

What It Is

Cinnamyl formate is a flavoring agent or adjuvant used in food and beverage formulations to provide characteristic cinnamon, fruit, and balsamic sensory notes. It is a chemical ester with the CAS number 104-65-4 and is part of a class of organic esters often employed in the flavor and fragrance industry. Other names for cinnamyl formate include cinnamyl methanoate, 3-phenyl-2-propen-1-yl formate, 3-phenylallyl formate, 2-propen-1-ol 3-phenyl formate, cinnamyl alcohol formate, and gamma-phenylallyl formate, reflecting its structural derivations and nomenclature variants. As a flavoring agent, it functions by interacting with olfactory receptors when consumed in trace amounts, contributing complex aromatic profiles that can enhance or complement other ingredients in a blend. Flavoring substances like cinnamyl formate are typically defined by regulatory bodies and technical specifications based on their chemical identity, purity, and functional use. The technical function listed for this compound is "flavoring agent or adjuvant," indicating its role in modifying or enhancing sensory characteristics of food products. Cinnamyl formate does not provide nutritional value in the form of calories, proteins, fats, or carbohydrates, but rather contributes sensory appeal and organoleptic complexity when formulated into flavor mixtures. It is recognized in inventories such as the FDA Substances Added to Food database under the relevant regulation part and by international expert committees for use in food flavorings. In addition to its use in food, cinnamyl formate may also be found in fragrance applications due to its balsamic and fruity aromatic qualities. Its inclusion in regulatory listings indicates that authorities have evaluated its chemical identity and identified conditions under which it may be safely used in accordance with good manufacturing practice.

How It Is Made

The production of cinnamyl formate generally follows established esterification chemistry common to organic synthesis of flavor and fragrance esters. The typical route involves reacting cinnamyl alcohol — a primary allylic alcohol with a phenyl substituent — with formic acid in the presence of an acid catalyst to form the formate ester linkage. This reaction is driven by the nucleophilic attack of the alcohol on the activated carboxylic acid derivative, producing the ester and water as a byproduct. Variants of this method may use catalytic amounts of sulfuric acid, phosphoric acid, or other protic catalysts to facilitate the esterification process. In industrial settings, the synthesis of cinnamyl formate is conducted under controlled conditions to ensure high purity and yield, given that food-grade materials require specific quality criteria. Reaction parameters such as temperature, molar ratios of reactants, catalyst choice, and purification steps like distillation or chromatography are optimized to produce a material that meets flavor industry specifications. The ester product is often further refined to remove residual reactants and impurities, ensuring a stable liquid suitable for use as a flavoring agent. While the underlying chemistry is well understood, manufacturers operating under food additive standards must adhere to good manufacturing practices and comply with regulatory requirements for food-grade substances. Technical specifications such as identity tests, purity thresholds, and limits on contaminants are established in compendia and expert committee evaluations to ensure that the final product is consistent and reproducible. Cinnamyl formate’s inclusion in such specifications allows it to be reliably sourced and employed by formulators in the food and beverage industry.

Why It Is Used In Food

Cinnamyl formate is used in food primarily for its sensory contribution as a flavoring agent. In food science and formulation, flavoring substances are added in trace amounts to achieve specific taste and aroma profiles that enhance consumer appeal without altering the inherent nutritional composition of the product. The compound’s organoleptic properties — a combination of cinnamon-like warmth, balsamic nuance, and fruity complexity — make it useful in a variety of flavor systems, particularly those incorporating spice, apple, cherry, and tropical notes. Flavor compounds like cinnamyl formate are selected based on their ability to interact synergistically with other components in a recipe. Rather than serving as primary ingredients, they function as modifiers that elevate or balance sensory impressions. For example, in confectionery applications, the addition of a carefully calibrated amount of a compound like cinnamyl formate can deepen the perceived sweetness, complement fruity base flavors, or mask minor off-notes without contributing sweetness itself. In beverages and bakery products, such flavoring agents help establish signature profiles that align with product positioning and consumer expectations. In addition, the use of cinnamyl formate and other esters in food formulations is governed by technical and regulatory guidance that emphasizes the principle of using the minimum quantity necessary to achieve the intended sensory effect. This practice supports safety and manufacturing efficiency, ensuring that the additive contributes to flavor without overuse. Its inclusion in regulatory listings and expert evaluations underscores its recognized role in contemporary food formulation when used within defined boundaries.

Adi Example Calculation

To illustrate how an acceptable daily intake (ADI) would function in practice, consider a hypothetical cohort of individuals consuming a flavored beverage containing a trace level of cinnamyl formate. Suppose the concentration of the compound in the beverage is such that daily intake of the flavoring agent amounts to microgram‑level exposure for an adult. A hypothetical calculation might assume a body weight of 70 kilograms for an adult and an exposure of 0.001 milligrams (1 microgram) per day from consumption of flavored products. Dividing the daily intake by body weight (0.001 mg ÷ 70 kg) yields an exposure of approximately 0.000014 mg per kilogram of body weight. If an ADI had been established at, for example, a nominal conservative threshold much larger than typical exposure — such as 1 mg/kg body weight per day — the hypothetical exposure of 0.000014 mg/kg represents a fraction of that threshold (0.0014 percent), illustrating how actual use levels can be far below levels that raise concerns. In the case of cinnamyl formate, expert evaluations have concluded that no safety concern exists at current levels of intake, meaning that actual exposure is considered negligible relative to any effect levels identified in toxicology assessments. This example serves to demonstrate the relationship between body weight, intake amounts, and conceptual ADI values in regulatory assessment contexts, but should not be interpreted as personal health advice.

Safety And Health Research

Safety evaluations for flavoring agents like cinnamyl formate focus on toxicological endpoints and exposure assessments that inform expert conclusions about their relative risk at typical usage levels. Scientific committees such as JECFA rigorously review available toxicology data, including acute toxicity, subchronic studies, and metabolic fate, to determine whether a substance raises concerns at the low levels of intake associated with food flavor use. For cinnamyl formate, JECFA’s assessment indicated that it does not pose a safety concern at current levels of intake as a flavoring agent, reflecting a conclusion that dietary exposure is far below levels associated with adverse outcomes in experimental models. Investigations of related cinnamyl esters and alcohols have been included in broader toxicology literature, providing context for understanding the compound’s metabolic pathways and potential effects. In general, esters used as flavoring agents are rapidly hydrolyzed to their corresponding alcohol and acid components in vivo, and these metabolites are further processed through common metabolic pathways. Regulatory evaluations consider this metabolic behavior alongside empirical toxicity data to inform conclusions. While specific chronic toxicity or reproductive toxicity studies for cinnamyl formate may be limited, expert committees incorporate weight‑of‑evidence approaches to address uncertainties and establish safety boundaries. The absence of specific adverse findings under typical use conditions forms part of the rationale for regulatory acceptance within defined frameworks. In practical terms, food safety authorities expect manufacturers to adhere to good manufacturing practice and to ensure that the quantities used in formulations remain low and consistent with flavoring functions. This conservative approach to exposure supports safety margins that account for variability in consumption patterns. Continued scientific research and post‑market surveillance further contribute to the ongoing understanding of flavoring substances and their safety profiles, with adjustments made to regulatory guidance if new evidence emerges.

Regulatory Status Worldwide

Cinnamyl formate is recognized in multiple regulatory and expert evaluation frameworks that guide its use in food products. In the United States, it is referenced under the synthetic flavoring substances and adjuvants regulations in 21 CFR 172.515, which lists it among substances that may be safely used in food in accordance with principles of good manufacturing practice and in the minimum quantity necessary to achieve the intended sensory effect. This regulatory reference indicates that it is permitted in food flavor formulations when used appropriately under the d section of the Code of Federal Regulations. The inclusion of cinnamyl formate in food additive inventories such as the FDA’s Substances Added to Food database reflects its acceptance in U.S. regulatory practice; however, the regulation itself emphasizes general conditions of use rather than specific numerical limits, consistent with flavoring agent provisions. Internationally, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated cinnamyl formate as a flavoring agent, assigning it JECFA number 649. According to JECFA’s evaluation, the compound raises no safety concerns at current levels of dietary intake when used as a flavoring substance, a classification that is based on comprehensive toxicological assessment and expert review. JECFA specifications encompass identity, purity criteria, and recommended analytical tests, providing a global reference for regulatory bodies and manufacturers that integrate such expert guidance into national food safety standards. In the European Union, specific E-number designation and formal approval status under EFSA frameworks are not evident from authoritative sources; as such, regulatory acceptance in the EU may be determined on a case‑by‑case basis in alignment with flavoring substance evaluations and general compliance requirements. Overall, cinnamyl formate’s regulatory footprint reflects recognition by established food safety authorities, with clear references under U.S. Code of Federal Regulations and JECFA expert evaluations. Compliance with applicable regulatory conditions and good manufacturing practice is essential for manufacturers and formulators incorporating this compound into food products.

Taste And Functional Properties

Cinnamyl formate has distinct sensory characteristics that influence its functional role in flavor systems. Organoleptically, it is described as having a balsamic and fruital-floral odor with a bittersweet, cinnamon-like taste at threshold levels. Such sensory descriptors indicate that the compound can contribute a multifaceted aroma that is both warm and nuanced, which is especially valuable in complex flavor profiles where harmony and depth are desired. The perception of these sensory qualities is concentration-dependent and is modulated by the presence of other flavoring substances and the food matrix. From a functional standpoint, flavoring esters such as cinnamyl formate are typically liquids at ambient conditions and are soluble in lipophilic environments, which aids their distribution and persistence in foods like confectionery, dairy, and beverages. Their volatility contributes to aromatic perception, meaning that a small amount can impart a notable scent and flavor impression. In practical formulation, solubility characteristics and interaction with other ingredients are considered to ensure consistent flavor release during consumption. The stability of cinnamyl formate under food processing conditions — such as exposure to heat during baking or pasteurization — is an important functional consideration. While many esters can undergo hydrolysis or degradation under extreme conditions, when used within typical processing ranges, cinnamyl formate maintains its integrity sufficiently to contribute its sensory attributes. Sensory scientists and formulators evaluate such stability as part of product development to ensure that the desired flavor impression persists through to the final product. In summary, the combination of aromatic complexity, volatility, and compatibility with other flavor ingredients underpins its functional properties in food applications.

Acceptable Daily Intake Explained

The concept of an acceptable daily intake (ADI) is a tool used by food safety authorities to express a level of exposure to a chemical that can be consumed daily over a lifetime without appreciable health risk. ADIs are typically established based on toxicological studies in experimental animals, identifying a no‑observed‑adverse‑effect level (NOAEL) and applying safety factors to account for uncertainties in extrapolating to humans. For many flavoring agents, including cinnamyl formate, formal numeric ADIs may not be established if expert reviews conclude that typical dietary exposures are orders of magnitude below levels associated with adverse effects in toxicology studies. JECFA’s evaluation of cinnamyl formate determined that there is no safety concern at current levels of intake when used as a flavoring agent. Such a conclusion implies that typical consumption through foods flavored with this compound does not approach thresholds that would trigger safety concerns, and as a result, a specific numeric ADI is not necessary. Instead, regulatory frameworks emphasize the use of the compound in the minimum quantity necessary to achieve the intended sensory effect, consistent with principles that limit exposure. When a numeric ADI is not defined, it reflects expert judgment that exposure at customary use levels is negligible relative to potential thresholds of harm, reinforcing the importance of responsible formulation. Understanding the ADI concept helps stakeholders differentiate between safe, regulated use and hypothetical overexposure scenarios that are far removed from practical application. Consumers need not calculate their own intake; rather, adherence by manufacturers to regulatory guidance and good manufacturing practice ensures that cumulative exposure remains within safe bounds.

Comparison With Similar Additives

Cinnamyl formate belongs to a class of ester flavoring agents that share functional similarities in contributing aromatic notes to food products. Esters such as isoamyl formate and phenethyl formate are other examples used in flavor formulation. Isoamyl formate delivers fruity notes that are reminiscent of plum or tropical fruit and is often chosen in applications where a distinct fruit aroma is desired. Phenethyl formate, another related ester, can contribute floral and honey‑like nuances that suit confections and beverages. While these compounds share the common ester functional group, they differ in carbon chain length and substituents, which influence their odor profiles, volatility, and sensory impact. Compared with cinnamyl formate, which combines cinnamon‑associated warmth with balsamic and fruity tones, isoamyl formate tends toward simpler fruity impressions with less spice character. Phenethyl formate may present a more floral or honey aroma, making it suitable for different segments of flavor formulation. The selection among these additives depends on the sensory target and desired balance in a flavor system. In all cases, the principle of using the minimum effective concentration to achieve the intended sensory effect applies, ensuring that each contributes distinct nuances without overwhelming other flavor components. Understanding such comparative profiles assists flavorists and product developers in crafting balanced and appealing flavor blends across diverse food categories.

Common Food Applications Narrative

Cinnamyl formate finds utility across a spectrum of food categories where nuanced aromatic contributions are sought. In confectionery and sweets, it is often integrated into flavor blends to enhance fruity, spice, and apple-like notes without overwhelming other elements; a carefully balanced additive can make a candy or gummy bear profile more lively and memorable. Bakery applications also benefit from its inclusion, particularly in products like pastries and cookies where a warm, cinnamon-associated aroma harmonizes with baked dough and sugar, contributing to consumer-perceived freshness and appeal. In beverage formulations, especially non‑alcoholic fruit drinks and flavored waters, cinnamyl formate can enrich the aromatic bouquet, providing depth and complexity to what might otherwise be a simple fruit taste. Small amounts of the compound may be used alongside fruit essences and other esters to craft a signature aroma that stands out on the shelf and engages the consumer’s senses. The compound’s versatility extends to dairy desserts such as flavored yogurts and ice creams, where its balsamic and fruital qualities can complement natural fruit inclusions or spice blends, enhancing the overall sensory experience. Beyond these categories, cinnamyl formate is also considered in savory and snack applications where a hint of warmth or fruitiness can add complexity to seasoned products. Its use is calibrated to the intended sensory outcome and balanced with other flavoring agents to ensure that it supports rather than dominates the profile. Across these applications, the common thread is the compound’s ability to contribute nuanced, multifaceted odor and taste impressions that elevate the perceived quality of food items when applied judiciously by experienced flavorists.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: EFSA evaluation and E number status not verified from authoritative sources

JECFA

  • Notes: JECFA concluded no safety concern but did not assign a numeric ADI on the d page
  • Adi Display: No safety concern at current levels of intake when used as a flavouring agent

Sources

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