CINNAMALDEHYDE PROPYLENEGLYCOL ACETAL

CAS: 4353-01-9 FLAVORING AGENT OR ADJUVANT

Cinnamaldehyde Propylene Glycol Acetal is a synthetic flavoring agent or adjuvant chemically derived from cinnamaldehyde and propylene glycol, used in food flavor applications and evaluated by international regulatory bodies for safety as a flavoring.

What It Is

Cinnamaldehyde Propylene Glycol Acetal is an organic chemical compound primarily used as a flavoring agent or adjuvant in food formulations. It is derived from the reaction of cinnamaldehyde, a naturally occurring aromatic aldehyde, with propylene glycol, creating an acetal structure. This compound has a spicy cinnamon-like character and belongs to a class of flavoring agents that provide or enhance taste and aroma properties in various food and beverage products. Its chemical identity is established by the CAS number 4353-01-9 and is also known under other descriptive names that reflect its structure and derivation. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated this compound, assigning it a unique additive evaluation number and classifying it within the flavouring agent functional class as part of international food safety evaluations. Flavoring agents such as Cinnamaldehyde Propylene Glycol Acetal are not nutrients; they are added to modify or enhance the sensory profile of food and beverages without contributing caloric or nutritional value. Its chemical classification places it among aromatic acetals, compounds often selected for their stability and sensory characteristics. Because it is a synthetic derivative of a naturally occurring compound, manufacturers can use it to achieve a reproducible taste and aroma effect. Despite this, its use is governed by international safety evaluations that consider potential toxicological risks and acceptable exposure levels. In the context of food science and regulation, Cinnamaldehyde Propylene Glycol Acetal is one of many flavoring compounds that have been studied to determine whether they present safety concerns at typical intake levels. The JECFA evaluation noted that there is no safety concern at current intake levels when used as a flavouring agent, reflecting an evidence-based assessment of its risk under normal conditions of use. This compound’s inclusion in food flavoring inventories and safety evaluations underscores its relevance in modern food formulation and the importance of regulatory oversight in ensuring consumer safety.

How It Is Made

The production of Cinnamaldehyde Propylene Glycol Acetal involves a chemical reaction between cinnamaldehyde and propylene glycol in the presence of an acid catalyst. This process forms an acetal linkage, stabilizing the aldehyde group of cinnamaldehyde by converting it into a more stable acetal structure. The reaction is typical of acetal formation, where an alcohol and an aldehyde combine under controlled conditions, often with removal of water to drive the equilibrium toward product formation. In industrial practice, the synthesis of this flavoring agent is carried out under conditions that ensure reproducible quality and purity consistent with food-grade standards. Manufacturers may use specific catalysts and controlled temperatures to optimize yield and minimize byproducts. After synthesis, the product is typically purified to remove unreacted starting materials and impurities, which may involve distillation or other separation techniques to meet regulatory and safety specifications. The purity and identity of the final compound are confirmed through analytical methods such as gas chromatography or mass spectrometry, ensuring that the flavoring agent meets defined specifications for use in food formulations. Because the compound is intended for food applications, production adheres to guidelines that align with good manufacturing practices (GMP) and quality assurance protocols. Safety data sheets and technical specifications guide manufacturers and users in handling, storage, and use, but detailed proprietary process conditions are generally beyond public disclosure. In summary, Cinnamaldehyde Propylene Glycol Acetal is synthesized through standard acetal formation chemistry between cinnamaldehyde and propylene glycol, followed by purification and quality control to yield a product suitable for use as a flavoring agent in food. Its manufacture is consistent with practices used for specialty flavor compounds in the food ingredient industry.

Why It Is Used In Food

Cinnamaldehyde Propylene Glycol Acetal is primarily used in food products as a flavoring agent or adjuvant to impart or enhance specific sensory characteristics, particularly spicy or cinnamon-like notes. Flavoring agents like this one are included in formulations where a distinctive aroma or taste profile is desired, such as in baked goods, confectionery, beverages, and other processed foods. These compounds help food manufacturers create consistent flavor profiles that meet consumer expectations and differentiate products in the marketplace. Flavor molecules, including acetals such as this compound, are selected for their ability to provide stable and lasting sensory effects. Unlike natural extracts that may vary in composition due to raw material differences, synthetic compounds offer batch-to-batch consistency, which is critical for large-scale food production. This quality is particularly important in global supply chains where consistency in flavor perception can influence consumer satisfaction and brand reputation. In addition to sensory impact, Cinnamaldehyde Propylene Glycol Acetal may interact with other ingredients in food systems to maintain flavor integrity under various processing conditions, including heat and pH changes. Its stability as an acetal makes it suitable for use in applications where harsher conditions might degrade more labile flavor compounds. Overall, its use in food supports the creation of desired taste experiences while maintaining product stability and consistency across production runs.

Adi Example Calculation

To illustrate how a hypothetical ADI might be considered, imagine a scenario where a flavoring agent has a notional ADI of 0.1 mg per kg body weight per day; this would mean that a person weighing 70 kg could theoretically consume up to 7 mg per day without exceeding the ADI. This example is purely illustrative and does not represent an actual regulatory ADI for Cinnamaldehyde Propylene Glycol Acetal, as a specific numeric ADI has not been published. The concept demonstrates how regulators translate toxicological data into per-body-weight guidance that accounts for lifetime exposure. Such hypothetical calculations help food scientists and safety assessors estimate margins of exposure when actual intake data and ADIs are available. The absence of a published numeric ADI for this compound reflects a conclusion from JECFA that current levels of intake do not raise safety concerns rather than the establishment of a specific numeric threshold. This approach underscores the distinction between qualitative safety conclusions and numeric ADIs in regulatory evaluations.

Safety And Health Research

Safety evaluations of flavoring agents such as Cinnamaldehyde Propylene Glycol Acetal focus on toxicological data including acute toxicity, metabolic fate, and potential effects at levels associated with normal dietary exposure. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) conducts systematic reviews of available data and determines whether there are safety concerns at typical intake levels based on exposure estimates and toxicology findings. For this compound, JECFA’s assessment concluded that there is no safety concern at current levels of intake when used as a flavoring agent, indicating that toxicological evidence does not suggest hazards under normal food use conditions. Food flavoring agents are subject to evaluation for endpoints such as genotoxicity, reproductive toxicity, and chronic toxicity; these data are considered in safety assessments. Regulatory bodies use conservative assumptions in exposure estimation and apply safety factors to account for uncertainties when setting intake guidance, though specific numerical acceptable daily intake (ADI) values for this compound have not been established in public JECFA documentation. Continued research into flavoring agents ensures that risk assessments remain current with evolving science, and manufacturers may generate additional data to support safety evaluations. The assessment of flavoring agents includes consideration of metabolism and breakdown products, as well as potential interactions with other ingredients, but the available data for this compound indicate that there are no safety concerns at expected intake levels. It is important, however, for manufacturers and regulators to continue monitoring new evidence to confirm that safety conclusions remain appropriate across diverse food applications.

Regulatory Status Worldwide

Cinnamaldehyde Propylene Glycol Acetal has been evaluated by the Joint FAO/WHO Expert Committee on Food Additives (JECFA), an international scientific body that assesses the safety of food additives and flavoring agents. According to the JECFA database, this compound has a designation number of 2214 and a FEMA flavoring number of 4596, indicating its inclusion in international flavoring evaluations. The JECFA evaluation concluded that Cinnamaldehyde Propylene Glycol Acetal does not pose a safety concern at current levels of intake when used as a flavoring agent, reflecting a risk assessment based on available toxicological data. In the United States, flavoring agents such as this compound may be listed in the FDA’s Substances Added to Food inventory, which includes flavoring substances evaluated by expert bodies including FEMA and JECFA. However, inclusion in this inventory does not necessarily represent formal FDA approval or a regulation in the Code of Federal Regulations. Rather, it indicates recognition and evaluation of the substance for intended technical effects in food products. As such, specific regulatory allowances, conditions, or use limits under Title 21 CFR are not explicitly defined for this compound without a dedicated FDA regulation, and its safety and use are supported by international risk assessments rather than direct FDA food additive regulations. Regulatory frameworks can vary globally, and local food safety authorities may have additional requirements or review processes for flavoring agents. The absence of explicit regulation does not imply prohibition but may require manufacturers to ensure compliance with general food safety and additive use principles. Ongoing surveillance and review by international bodies like JECFA help inform national regulators about updates in safety data and acceptable use practices.

Taste And Functional Properties

Cinnamaldehyde Propylene Glycol Acetal is characterized by a spicy cinnamon-like aroma and flavor, making it valuable in flavor formulations designed to evoke warmth, spice, and aromatic complexity. Sensory descriptions in flavor databases indicate that it provides a spicy cinnamon note that can enhance or complement other flavor components in food products. Its sensory profile is the result of its chemical structure, where aromatic and acetal functional groups contribute to its volatility and receptor interactions. From a functional perspective, this compound is more stable than its parent aldehyde (cinnamaldehyde) due to the acetal formation, which can reduce susceptibility to oxidation or degradation. This stability is beneficial in food processing environments where heat, light, or pH changes might otherwise alter flavor integrity. Solubility characteristics may vary across different food matrices; acetals generally show better solubility in lipid or ethanol-rich environments compared to water, affecting how they are incorporated into formulations. Because of its sensory impact and stability, Cinnamaldehyde Propylene Glycol Acetal is often chosen in flavor blends where sustained aromatic perception is desired. It can work synergistically with other flavor compounds to achieve complex profiles, especially in baked goods, confectionery, and beverages where spicy or cinnamon nuances are integral. Its functional profile supports its use by food developers seeking robust flavor performance without compromising product stability.

Acceptable Daily Intake Explained

Acceptable daily intake (ADI) is a concept used by international regulatory bodies to indicate the amount of a substance that can be consumed daily over a lifetime without appreciable health risk. ADIs are typically derived from toxicological studies in laboratory animals, with safety factors applied to account for differences between animals and humans and variability within human populations. For many flavoring agents, including Cinnamaldehyde Propylene Glycol Acetal, JECFA may conclude that there is no safety concern at current intake levels rather than establishing a specific numeric ADI, reflecting confidence based on available data that exposure from normal food use does not pose appreciable risk. It is important to understand that an ADI is not a goal for consumption; rather, it serves as a benchmark for regulatory and risk assessment purposes. A conclusion of no safety concern suggests that routine consumption through food products under typical usage conditions is unlikely to exceed levels associated with toxicological effects. This conclusion is informed by exposure estimates, chemical-specific data, and conservative assumptions in safety evaluations. Manufacturers and regulatory scientists use concepts like ADI to guide assessments of how much of a flavoring agent consumers might ingest from food products and to ensure that safety margins remain adequate. While a numeric ADI for this compound is not explicitly published in JECFA monographs, the qualitative conclusion of no safety concern supports its continued use within normal flavoring applications, recognizing that ongoing monitoring and research contribute to continued confidence in safety assessments.

Comparison With Similar Additives

Cinnamaldehyde Propylene Glycol Acetal can be compared with other flavoring agents such as cinnamaldehyde itself and ethyl vanillin in terms of sensory properties and regulatory evaluations. Cinnamaldehyde, a naturally occurring aldehyde found in cinnamon oil, provides a strong cinnamon flavor and has been assessed by JECFA with an ADI for related substances; it often serves as a benchmark for spicy, warm flavor profiles. In contrast, the acetal derivative offers similar sensory nuances with enhanced stability, which can be advantageous in heat-processed foods. Ethyl vanillin is another flavoring compound used widely for sweet and vanilla profiles, differing in character from the spicy notes of cinnamaldehyde derivatives. Regulatory assessments for ethyl vanillin have similarly focused on toxicological data and exposure estimates, often resulting in evaluations that support safety under typical usage conditions. Comparing such compounds highlights how different chemical structures impact sensory impressions, metabolic pathways, and regulatory considerations, even when all are used within approved flavoring applications. These comparisons illustrate that while flavoring agents may vary widely in chemical structure and sensory effects, safety assessments by expert bodies like JECFA employ consistent principles of toxicology and exposure estimation to ensure that their use in food products remains appropriate and within established safety parameters.

Common Food Applications Narrative

Cinnamaldehyde Propylene Glycol Acetal finds application in a variety of food and beverage categories where spicy or cinnamon-like flavor notes are integral to the product profile. In baked goods such as cookies, pastries, and sweet breads, this compound can contribute to the overall sensory experience by reinforcing warm, spicy notes that complement sugar and other aromatic components. Its stable flavor profile makes it suitable for inclusion in formulations that undergo heat processing without significant loss of sensory character. In confectionery products like hard candies, chewing gums, and flavored chews, Cinnamaldehyde Propylene Glycol Acetal can be used alongside other flavoring agents to create complex taste notes that appeal to consumers. The compound’s spicy profile pairs well with sweet and fruity tones, enabling food scientists to craft unique flavor combinations that enhance product differentiation. Similarly, in beverages such as flavored teas, soft drinks, and specialty drinks, this compound may be incorporated to deliver distinctive aromatic warmth that enriches the overall drinking experience. Beyond sweet formulations, savory snack seasonings and spice blends may also benefit from the inclusion of this flavoring agent, where its cinnamon-like notes can add depth and complexity without overpowering other ingredients. Its use extends to processed foods, sauces, and dressings where a nuanced spicy character enhances the overall flavor profile. Across these applications, Cinnamaldehyde Propylene Glycol Acetal serves as a tool for flavor developers to achieve consistent and appealing sensory outcomes that meet consumer expectations for taste and aroma in diverse food categories.

Safety & Regulations

FDA

  • Notes: FDA inclusion in inventories does not constitute formal approval; no specific CFR regulation located.

EFSA

  • Notes: No EFSA-specific numeric ADI or E number publicly available.

JECFA

  • Notes: JECFA concluded no safety concern; numeric ADI not published in summary.
  • Adi Display: No safety concern at current intake levels when used as flavoring agent

Sources

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