CYCLOTENE PROPIONATE

CAS: 87-55-8 FLAVORING AGENT OR ADJUVANT

Cyclotene propionate is a synthetic flavoring agent and adjuvant used to impart sweet creamy, buttery, or caramel-like sensory notes in food formulations and flavour applications.

What It Is

Cyclotene propionate is a synthetic food flavoring agent classified as a flavouring agent or adjuvant used in food and flavour industries to impart desirable sensory characteristics. It is an ester of a cyclopentenone ring system with a propionate functional group, identifiable by its Chemical Abstract Service (CAS) registry number 87-55-8 and a PubChem CID 66600 that corresponds to the compound structure. The compound has a variety of other names that reflect its detailed chemical descriptors, illustrating its structure as a 2‑methyl‑5‑oxo‑1‑cyclopentenyl propionate variant. In regulatory and flavour chemistry contexts, alternative synonyms serve to align nomenclature across databases and flavour libraries. As a synthetic flavoring additive, it belongs to a class of compounds that help modulate aroma profiles in food products. The role of cyclotene propionate within food formulation centers on subtle sensory enhancement. It is used in minimal quantities to impart creamy, caramellic, or buttery type characteristics to a variety of foods, acting as a flavour modulator. Because of its chemical structure and sensory impact, this compound is categorised under flavouring agents in international additives databases, and it has been evaluated by international bodies for its safety and technical functionality. The compound’s classification as a flavouring agent or adjuvant aligns with functional use categories in food science that differentiate agents added to deliver sensory attributes from nutrients or preservatives. In the wider context of food additives, cyclotene propionate is distinct from direct nutritive components; it is not intended to provide nutritional benefit but instead to deliver specific sensory impressions in very low concentrations. Its designation as an adjuvant reflects its role in assisting or enhancing other flavour components rather than acting as a primary ingredient. It is part of a structured approach to flavour chemistry where specific compounds are selected for their sensory properties and compatibility with food matrices.

How It Is Made

Cyclotene propionate is typically synthesized through organic esterification processes that involve reacting a cyclopentenone derivative with propionic acid or its derivatives under controlled conditions. In general, the synthesis of esters in industrial flavour chemistry involves forming a bond between an alcohol or related functional group and a carboxylic acid component, often under acid catalysis or azeotropic removal of water to drive the reaction toward completion. The resulting ester, cyclotene propionate, is subsequently purified to remove unreacted precursors and byproducts. The manufacturing process includes steps for quality control and specification assessment to ensure consistency of the final compound. For flavour applications, purity thresholds are defined so that the sensory profile and chemical integrity meet the needs of formulators and regulatory specifications. Specifications available in international flavour databases outline minimum acceptable assay percentages and physical attributes such as refractive index, colour, and odour profile. Beyond the primary esterification, further downstream processing may include distillation, solvent extraction, and analytical confirmation of identity and purity using techniques such as mass spectrometry or chromatographic fingerprinting. From a broader perspective, compounds such as cyclotene propionate are manufactured by chemical producers who specialise in fine chemicals and food flavour compounds. These producers often supply the compound in bulk quantities, shipping it under controlled conditions to flavour houses and food manufacturers. The compound’s production must also consider safety in handling and storage; for example, containers are typically stored in inert atmospheres to maintain stability. Solvents and reagents used in the manufacturing process are selected to meet regulatory and food‑grade standards. The production scale can range from small research batches to larger commercial runs, depending on market demand and application requirements.

Why It Is Used In Food

Cyclotene propionate is used in food primarily because of its functional contribution to flavour and aroma profiles. In product formulation, food scientists and flavourists often seek compounds that can deliver specific sensory notes that enhance the overall eating experience. Cyclotene propionate has been characterised as contributing creamy, buttery, or caramellic impressions when used at appropriate levels. This makes it valuable in systems where such notes are desirable, such as confectionery, dairy analogues, or baked goods. Because it interacts with human sensory receptors in a way that enhances perception of sweet or rich flavour profiles, it is selected for use in complex flavour blends. Another reason for its inclusion in food systems is its compatibility with other flavouring agents and its relative stability. In many food products, ingredients must withstand processing conditions such as mixing, mild heat, and storage without significant degradation of sensory attributes. Cyclotene propionate’s ester structure provides a balance of volatility and stability that allows the sensory component to remain perceptible in the finished product. Its use is typically in very low concentrations because flavour compounds are potent and sensory impacts are achieved without large additions. This conservative use profile also aligns with good manufacturing practice, where the minimum effective amount of an additive is used to achieve its intended effect. Additionally, in the context of flavour design, cyclotene propionate serves as a building block to achieve complexity. Modern flavours are often constructed from multiple volatile compounds that interact synergistically to give naturalistic or enhanced sensory experiences. By incorporating cyclotene propionate into such blends, formulators can fine‑tune the profile to balance sweetness, richness, and caramel‑like notes in a way that supports consumer expectations for product taste. Its application is part of the broader toolkit of flavour chemists who blend multiple agents to achieve targeted sensory outcomes.

Adi Example Calculation

As an illustrative concept, imagine a hypothetical ADI for a flavouring agent: if a regulatory body established an ADI of 1 mg per kilogram of body weight per day for a flavour compound, a 70‑kilogram adult could theoretically consume up to 70 mg of that compound daily over a lifetime without expected health risk. This example demonstrates how the ADI framework translates toxicological thresholds into practical intake limits. However, for cyclotene propionate a numeric ADI was not specified in the JECFA evaluation because it concluded that typical levels of exposure from flavour use were not of concern. It is important to emphasise that this example does not apply directly to cyclotene propionate because no numeric ADI is available from authoritative sources. The example illustrates how such numbers are used when defined. In practice, flavouring agents like cyclotene propionate are used at levels far lower than what would generate a daily intake in the milligram per kilogram body weight range. Typical use quantities are micrograms to low milligrams per kilogram of food, and dietary exposure calculations take into account consumption patterns across different food categories. This example serves to help contextualise the ADI concept rather than describe actual regulatory values for cyclotene propionate. Where regulatory bodies define numeric ADIs for other substances, the calculation helps translate scientific assessments into consumer‑focused guidance. In cases like cyclotene propionate, the determination of no safety concern at typical use levels functions equivalently to an implicit ADI that is above estimated exposure, without specifying a numeric value.

Safety And Health Research

Safety and health research on cyclotene propionate as a flavouring agent focuses on toxicological endpoints relevant to its use in food. Evaluations by expert bodies such as JECFA incorporate toxicological data from available studies, including assessments of acute toxicity, subchronic exposure, and other standard endpoints. JECFA’s conclusion that there were no safety concerns at current levels of intake reflects a weight‑of‑evidence approach that considers exposure estimates based on typical uses in flavouring applications. Independent flavour evaluation bodies like FEMA have also assessed cyclotene propionate as part of broader evaluations of alicyclic flavouring substances. These assessments involve reviewing existing toxicological literature and data to determine whether the compound’s use in foods raises safety concerns. While detailed results of individual studies are part of confidential or subscription‑based scientific journals, the overall conclusion from these expert panels supports the view that cyclotene propionate can be used safely when applied within recognised flavour‑industry thresholds. Scientific research into flavouring agents generally includes examining metabolic pathways, potential for genotoxicity or mutagenicity, and effects on reproductive or developmental outcomes. For cyclotene propionate, the publicly available expert evaluations summarise that typical levels do not raise safety concerns, acknowledging that exposure from food flavour use is orders of magnitude lower than doses used in toxicology studies. It is standard regulatory practice to assess compounds with conservative safety factors to ensure consumer protection. While specific endpoints such as biochemical pathways have not been individually presented in publicly accessible summaries, the expert evaluations implicitly encompass such considerations. It is important to note that safety research for flavouring agents like cyclotene propionate is distinct from research on nutritive ingredients or pharmaceutical compounds. The focus is on ensuring that the levels consumed under normal use scenarios do not present incremental risk. Regulators and expert panels review available data and differential exposure contexts to make these determinations, which inform regulatory status and guidance on use in food products.

Regulatory Status Worldwide

Cyclotene propionate has been evaluated by international expert bodies for its safety and technical use as a flavouring agent. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has reviewed the compound under its flavouring agent database and recorded its functional class and evaluation status. According to the JECFA database entry, this compound has an assigned JECFA number 2055 and was evaluated with the conclusion that at current levels of intake when used as a flavouring agent, it presented no safety concerns for consumers. The JECFA evaluation year listed in the database is 2010, but a specific numeric acceptable daily intake (ADI) value was not established in the publicly available summary; instead, the evaluation states the lack of safety concern within typical use levels. This indicates that JECFA’s review considered available toxicological data sufficient to not require a numerical ADI in the context of flavour use. In the United States, regulatory listings such as the Substances Added to Food inventory (formerly EAFUS) include flavouring substances that have been evaluated by recognised bodies including FEMA and JECFA. Inclusion in this inventory reflects recognition of its use as a flavouring agent evaluated by FEMA expert panels and international bodies, but it does not by itself confer formal FDA approval under a specific Code of Federal Regulations section. As a synthetic flavouring agent, specific regulatory conditions in the U.S. are managed under broader provisions that govern synthetic flavouring substances and adjuvants; for example, 21 CFR 172.515 outlines conditions under which synthetic flavouring substances can be safely used in food. Cyclotene propionate’s regulatory status in the U.S. reflects these broader frameworks rather than a unique, additive‑specific regulation. European regulatory frameworks for food additives involve the European Food Safety Authority (EFSA) and related lists of permitted flavouring substances. A specific E‑number is not directly assigned to cyclotene propionate, and information about EFSA’s formal evaluation and numeric values such as an EFSA ADI is not available in authoritative source listings. Therefore, its status in the EU may align with general provisions for flavouring agents and the outcome of expert evaluations by bodies like JECFA and FEMA. Manufacturers utilising this compound within products intended for EU markets would need to ensure compliance with applicable flavouring regulations and any EFSA requirements.

Taste And Functional Properties

Cyclotene propionate is recognised for its sensory characteristics that lean toward creamy, buttery, and caramellic type aroma impressions. These sensory properties are described in flavour libraries and chemical databases that profile its organoleptic impact. Such sensory notes make it useful for flavour modulation in foods where richness or sweet complexity is desired. The compound’s effectiveness at low concentration is a typical property of many flavouring agents — it has a strong perception impact without needing significant mass in the formulation. From a chemical behaviour perspective, cyclotene propionate is an ester. Esters generally have distinctive odour and flavour contributions in food and fragrance chemistry; the specific structure of this compound imparts a balance of volatility and persistence that defines its sensory footprint. The volatility of an ester influences how readily it enters the headspace above a food product — a key factor in aroma perception. In the context of cyclotene propionate, volatility is sufficient to ensure sensory detection without rapid loss during processing. Solubility characteristics are also relevant: while the compound is practically insoluble or has low solubility in water, it is soluble in ethanol and other organic solvents, which aligns with its use in flavour blends that may be delivered in solvent carriers. Functional behaviour in different food matrices can vary; for example, in high‑fat systems the ester may integrate more readily into the lipid phase, while in carbohydrate‑rich systems its perception may be modulated by other volatile compounds present. Temperature and pH conditions in food processing can also influence how flavour compounds are perceived. Cyclotene propionate’s structure allows it to remain stable under typical mixing and processing conditions encountered in many food products. Sensory descriptors attached to this compound often mention its creamy and buttery character, helping to impart perceived richness in finished formulations.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) is a concept used in food safety risk assessment to define the amount of a chemical that can be consumed every day over a lifetime without appreciable health risk. The ADI is typically expressed in milligrams of substance per kilogram of body weight per day and is derived from toxicological studies that identify thresholds below which no adverse effects are observed. For some flavouring agents, regulators establish numeric ADIs based on detailed toxicology profiles and exposure estimates. However, in the case of cyclotene propionate, expert panels such as those convened by JECFA have concluded that typical use levels in foods do not raise safety concerns, and a numeric ADI was not specified in the publicly summarised evaluation. Instead, the evaluation notes that current use levels are considered safe. The absence of a numeric ADI for cyclotene propionate does not imply that it is unsafe; rather, it reflects the outcome of expert risk assessment that the compound’s typical exposure through food flavour use does not warrant a defined numeric limit given existing data. This is often the case for flavouring agents used at very low concentrations, where exposure estimates fall well below levels of toxicological concern. The ADI mechanism provides a conservative benchmark in situations where regulators determine that defining a numerical threshold benefits exposure management, but expert bodies may also conclude safety is assured without needing to specify such a number. For consumers and formulators, understanding the ADI concept helps interpret risk assessments: it is a conservative guide grounded in scientific evaluation of toxicology and exposure. In the absence of a numeric ADI for cyclotene propionate, its safety is contextualised by expert findings that typical dietary exposure levels are not expected to be of concern. Regulatory bodies and industry expert panels use this information to support safe use practices and inform labelling where relevant.

Comparison With Similar Additives

Flavouring agents with similar purposes to cyclotene propionate include other ester‑type compounds used to impart fruity, creamy, or sweet notes. For example, ethyl butyrate and isoamyl acetate are esters that provide fruity or banana‑like notes in flavour systems, and they are used at low concentrations to achieve specific sensory effects. Unlike cyclotene propionate, which is valued for creamy or buttery nuances, these esters contribute more distinctly fruity impressions. The choice of one over another depends on the target flavour profile. Another comparison can be drawn with lactones such as γ‑octalactone, which can contribute creamy and coconut‑like notes. Like cyclotene propionate, lactones are used to add complexity to flavour blends and can be stable under processing conditions. However, lactones often have different volatility and solubility behaviour, which affects how they are perceived in various food matrices. Flavourists select between these compounds based on desired volatility, intensity, and compatibility with other components. Diacetyl is another compound used in flavour applications, particularly for buttery notes. While diacetyl delivers strong buttery impressions, it differs structurally from cyclotene propionate and has a different safety profile and sensory intensity. Regulators and scientists evaluate diacetyl’s safety independently due to its distinct toxicological endpoints, illustrating that similar sensory outcomes do not imply identical regulatory or safety considerations. By contrast, cyclotene propionate’s evaluation by expert panels concluded no safety concern at typical use levels. These comparisons highlight how flavouring agents with different chemical structures can achieve related sensory outcomes but vary in their sensory nuances, regulatory evaluations, and functional behaviour. Formulators choose from a palette of such compounds to build balanced flavour profiles that meet sensory and regulatory expectations.

Common Food Applications Narrative

Cyclotene propionate finds its niche in food applications that benefit from subtle enhancements of flavour profiles. Because it is used in very low concentrations due to its potency as a flavouring agent, consumer products rarely list it as a primary ingredient. Instead, it functions behind the scenes as part of complex flavouring systems that help define the sensory character of the finished product. In confectionery items, for example, flavour profiles often aim to balance sweetness with depth and richness. Ingredients like cyclotene propionate can contribute creamy or caramellic notes that augment the sweetness derived from sugars, helping to round out the overall aroma and taste profile. In baked goods, the compound may enhance the perception of baked or browned notes when paired with other flavour components developed during baking processes. Such applications illustrate its role as a modulator rather than a dominant flavour. In dairy analogues and some beverage systems, cyclotene propionate may be part of flavour blends that simulate or complement natural dairy flavours. Its sensory characteristics can help achieve a perception of richness in products that are formulated without traditional dairy fats or proteins. For example, in plant‑based creams or dessert formulations, the addition of selected flavouring agents like cyclotene propionate can support flavour complexity that would otherwise be difficult to achieve. Likewise, in sauces and dessert toppings, it can reinforce sweet, buttery, or cream‑like notes that make products more appealing to consumers. Across these applications, cyclotene propionate is not used in isolation but as part of a coordinated flavour design strategy. Flavourists select a spectrum of volatile compounds to deliver targeted sensory cues, and cyclotene propionate plays a role in that palette of compounds. Because of its specific sensory contribution, manufacturers choose it when the product profile calls for richness, sweet complexity, or creamy nuances. In all cases, sensory evaluation and formulation science guide its use to achieve balanced results that support consumer expectations for taste and aroma.

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Safety & Regulations

FDA

  • Notes: No specific FDA regulation section was identified; compound is listed in Substances Added to Food inventories but specific approval under CFR is not established.

EFSA

  • Notes: No specific EFSA numeric ADI or E‑number found in authoritative sources.

JECFA

  • Year: 2010
  • Notes: JECFA concluded no safety concern at current levels of intake but did not specify a numeric ADI.

Sources

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