CINNAMIC ACID

CAS: 621-82-9 FLAVORING AGENT OR ADJUVANT

Cinnamic acid is a flavoring agent or adjuvant with the CAS number 621-82-9, used in food products to provide floral or honey-like sensory characteristics under conditions of good manufacturing practice.

What It Is

Cinnamic acid is a chemically defined flavoring agent and adjuvant with the CAS number 621-82-9 that is used in food and beverage products for sensory impact. This compound belongs to a class of organic aromatic carboxylic acids characterized by a phenyl ring attached to an unsaturated carbonyl group, giving it a distinctive aromatic profile. In regulatory contexts, cinnamic acid is referenced under specific food additive provisions such as 21 CFR 172.515 in the United States, where synthetic flavoring substances and adjuvants, including cinnamic acid, may be used in accordance with good manufacturing practice to achieve intended flavor effects in foods without imparting nutritive value. Cinnamic acid is recognized by international safety evaluators as a flavoring agent that does not present safety concerns at typical intake levels when used in food, according to summary evaluations by expert committees. As a flavoring ingredient, it may be derived from natural sources like cinnamon oil or synthesized for consistent quality and use in food formulations. The identity of this compound is defined by its molecular structure and consistent naming across regulatory and scientific contexts, ensuring that food technologists and regulators refer to the same substance when considering its use in food products. The role of cinnamic acid in food goes beyond simple taste; it is part of a broader category of agents that help shape consumer sensory experiences. These agents are typically low in concentration in finished products but can significantly influence aroma and flavor perception. As a result, cinnamic acid is discussed in regulatory, safety, and technical food science literature to guide its appropriate application in food and beverage systems.

How It Is Made

Cinnamic acid can be obtained from both natural and synthetic sources, with the natural form typically isolated from essential oils such as those derived from cinnamon bark or balsams. In industrial settings, this compound may also be synthesized through well-known organic chemistry methods that build its aromatic structure and unsaturated acid functionality. Processes such as condensation reactions between benzaldehyde and malonic acid derivatives are common laboratory or industrial approaches to producing cinnamic acid on a scale suitable for flavor ingredient manufacturing. The manufacturing of food-grade cinnamic acid involves purification steps that ensure the final product meets established quality and purity specifications appropriate for use in food applications. These specifications often include limits on impurities and consistent characterization of the chemical identity, which are important precursors to regulatory evaluation and safety assessment. Good manufacturing practice dictates that such production processes are controlled, reproducible, and documented to provide consistent sensory and functional performance in food systems. In the context of flavor chemistry, producers of cinnamic acid also consider sourcing sustainability, batch-to-batch consistency, and analytical verification of identity and purity. These quality control measures serve both regulatory compliance and functional requirements, as manufacturers and food developers rely on well-defined ingredient performance. The resulting ingredient is typically a crystalline solid that can be formulated directly into flavor blends or further transformed into esters and related derivatives for specific applications.

Why It Is Used In Food

Cinnamic acid is used in food primarily as a flavoring agent or adjuvant to impart or enhance aromatic and sensory notes within a broad range of food products. Its inclusion in food formulations can contribute subtle floral, sweet, or honey-like nuances that complement other flavoring components. Because many food products aim for balanced sensory profiles, flavoring agents like cinnamic acid help food developers achieve targeted flavor character without overwhelming the product’s inherent taste. In addition to direct contribution to sensory perception, cinnamic acid may be involved in complex flavor blends where its chemical interactions with other constituents facilitate the creation of desirable overall aroma profiles. Food technologists often leverage such compounds to fine-tune flavors in baked goods, confections, beverages, dairy products, and savory applications. When used in combination with other flavoring substances, it can help create signature tastes that differentiate products in competitive markets. The functional logic behind using cinnamic acid also includes its compatibility with typical food processing conditions. While this compound is generally used at low levels, it demonstrates sufficient stability under common processing scenarios such as thermal treatment or incorporation into complex matrices. This reliability allows food manufacturers to create consistent sensory experiences in finished products, aiding product quality and consumer acceptance.

Adi Example Calculation

An illustrative example of how Acceptable Daily Intake (ADI) concepts are applied can help clarify the reasoning behind safety evaluations. Imagine a hypothetical flavoring substance for which regulators establish an ADI of X milligrams per kilogram of body weight per day, where X represents a conservative safety threshold derived from toxicological studies. For a person weighing 70 kilograms, the hypothetical ADI would translate to a maximum of 70 times X milligrams per day, assuming lifetime exposure at that level. In practice, typical exposure to flavoring agents like cinnamic acid is many times lower than such theoretical ceilings, reflecting their low use levels in food products. It is important to emphasize that this calculation is illustrative and not tied to a specific numeric ADI for cinnamic acid, as expert evaluations have not established a numeric ADI expressed in conventional units for this compound. Instead, regulatory conclusions that no safety concern exists at current intake levels serve a similar function in indicating that typical exposure is unlikely to reach levels associated with adverse effects within the context of normal dietary patterns. As such, illustrative examples help readers understand the conservative logic behind safety frameworks without implying specific personal consumption targets.

Safety And Health Research

Safety evaluations of cinnamic acid have been conducted by internationally recognized expert committees to assess its toxicological profile and potential risks associated with dietary exposure. These evaluations typically involve reviewing available scientific data on metabolism, potential toxicity, and observed effects in experimental systems, as well as considering exposure levels typical of use as a flavoring agent. Summaries of such evaluations conclude that cinnamic acid does not pose safety concerns at current levels of intake when used as intended in food products, which supports its continued use in flavor formulations. (化学信息网) Regulatory safety assessments focus on identifying any hazards that could arise from consumption, including potential effects on organ systems, genotoxicity, and chronic endpoints. For cinnamic acid, the available data evaluated by expert panels have not identified specific adverse health effects directly linked to its use in food at typical exposure levels. This does not imply that any amount is inherently risk-free, but rather that, within the context of normal food use, observed effects have not raised significant concern. Scientific research also considers the behavior of cinnamic acid within metabolic pathways following ingestion, how the compound is broken down and eliminated, and whether any metabolites warrant separate consideration. These scientific considerations inform risk assessment frameworks that underlie regulatory decisions. While specialized research may explore broader biological interactions, regulatory evaluations emphasize safety margins and conservative assumptions to ensure that consumer exposure remains well within acceptable bounds.

Regulatory Status Worldwide

In the United States, cinnamic acid as a flavoring agent or adjuvant is referenced under 21 CFR 172.515, which outlines the conditions of safe use of synthetic flavoring substances and adjuvants in food when applied in accordance with good manufacturing practice. This regulatory provision permits such compounds to be used at levels no greater than necessary to achieve the intended sensory effect and requires that they meet specifications appropriate for food-grade ingredients. Direct references to cinnamic acid in this regulatory section establish that its use is accommodated under existing food additive provisions that govern flavoring substances and related agents in food products. (化学信息网) Internationally, expert bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have evaluated cinnamic acid and concluded that it does not present safety concerns at current levels of intake when used as a flavoring agent. Such evaluations typically consider toxicological data, exposure assessments, and specifications of identity and purity, and their conclusions support regulatory acceptance of such flavoring agents worldwide. Regulatory frameworks in other regions, such as the European Union, assess flavoring substances through specific authorization processes that require safety evaluation and listing on flavoring substances inventories under applicable regulations. (化学信息网) Although exact authorizations and conditions of use vary across jurisdictions, cinnamic acid is generally accommodated within regulatory systems that govern flavoring agents. This reflects a consensus that, when used in accordance with good manufacturing practice and within established safety parameters, such substances can be included in food and beverage products to achieve intended sensory effects without compromising consumer safety.

Taste And Functional Properties

Cinnamic acid exhibits a distinct aromatic profile that contributes floral, sweet, and honey-like sensory characteristics in food formulations. This sensory signature makes it valuable in enhancing or rounding out flavor profiles in a variety of food and beverage applications. The perception of its aroma is often described in terms that align with its chemical structure, which combines aromatic and acid functional groups. Functionally, cinnamic acid is applied at low concentrations in food systems, consistent with how flavoring agents are generally used. Its solubility characteristics allow it to disperse effectively in both aqueous and lipid phases, depending on the formulation, making it versatile across product categories. Although subtle in final taste impact, its presence can influence the perceived complexity and depth of flavor when paired with other sensory-active compounds. In practical use, manufacturers account for the stability of cinnamic acid under typical processing conditions. While high heat or extreme pH changes can alter many organic compounds, cinnamic acid maintains its flavor contribution within the typical range of food processing parameters. Its integration into flavor systems considers both sensory impact and functional behavior, enabling formulators to achieve consistent taste profiles in consumer products.

Acceptable Daily Intake Explained

The concept of Acceptable Daily Intake (ADI) is a regulatory construct used to describe the level of daily exposure to a chemical substance that is considered safe over a lifetime, based on available toxicological data and safety factors. ADIs are typically derived from observed no-effect levels in animal studies, with appropriate uncertainty factors applied to account for differences between animals and humans and variability within human populations. In the context of flavoring substances like cinnamic acid, evaluations by expert committees may conclude that no safety concerns exist at typical intake levels without specifying a numeric ADI, reflecting that exposure from food use is comparatively low and not associated with adverse outcomes. (化学信息网) The ADI concept helps regulators and risk assessors to frame dietary exposure in safety terms, but it is not a recommendation for daily consumption. Instead, it serves as a benchmark for ensuring that aggregate exposure from all food sources remains within bounds considered safe based on scientific evidence. When regulatory evaluations indicate that a substance does not raise safety concerns at current intake levels, it suggests that typical use in food is unlikely to exceed exposure thresholds of concern. As regulatory science evolves, ongoing research and exposure assessment may refine how ADIs are expressed for specific substances, including potential use of updated data to support safety conclusions.

Comparison With Similar Additives

Flavoring agents such as cinnamic acid share commonalities with other aromatic compounds used in food to influence sensory perception. For example, vanillin and ethyl vanillin are widely used flavoring agents that provide sweet and creamy notes, particularly in baked goods and confectionery. Like cinnamic acid, these compounds are used at low concentrations to achieve targeted sensory effects and are evaluated for safety within regulatory frameworks that consider exposure and toxicological data. Another example is benzaldehyde, which imparts almond-like notes and is used in beverages, desserts, and confections. Benzaldehyde and cinnamic acid both belong to classes of aromatic compounds with distinct sensory signatures, and both are subject to regulatory evaluation as flavoring substances. The differences between them lie in their specific sensory profiles and how they interact with other components in flavor systems, with each compound selected based on desired effects in finished products. Comparing cinnamic acid to broader classes of flavoring agents highlights how food technologists balance sensory contribution, stability, and compatibility within formulations. While each substance has a unique profile, they are united by their role in shaping consumer sensory experience. Regulatory and safety assessments for these compounds follow similar principles, ensuring that their use in food remains consistent with safety expectations when applied in accordance with good manufacturing practice.

Common Food Applications Narrative

Cinnamic acid finds application across a wide range of food and beverage products where its aromatic characteristics contribute to the desired sensory profile. In baked goods, for example, small amounts of cinnamic acid may complement spice and sweetness elements, enhancing the overall perception of aroma without dominating the flavor profile. Beverages such as flavored teas, ready-to-drink products, and soft drinks may also incorporate cinnamic acid within complex flavor blends to deliver a balanced and appealing aroma that resonates with consumer preferences. Beyond beverages and baked goods, cinnamic acid can be part of flavor formulations in confections, dairy-based desserts, and savory snacks where nuanced aromatic enhancement is valued. Its role is not to provide nutritional benefit but to support the sensory experience that helps define product identity on the market. Flavor houses and food developers may use cinnamic acid in custom blends that target specific taste impressions sought by their customer base. The use of cinnamic acid in these food applications aligns with the broader industry practice of combining multiple flavoring agents to achieve distinct sensory outcomes. This compound’s contribution is often subtle but meaningful within well-designed flavor systems. As food innovation continues to evolve, flavoring agents like cinnamic acid remain integral to creating diverse sensory experiences that meet evolving consumer expectations.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: EFSA specific authorization not verified from available EU lists

JECFA

  • Notes: JECFA evaluation concluded no safety concern at current levels without numeric ADI
  • Adi Display: No numeric ADI specified in JECFA summary

Sources

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