What It Is
DIHYDRONOOTKATONE is a chemical compound with the CAS number 20489-53-6 used as a flavouring agent or adjutant in food applications. It belongs to a class of cyclic ketones that contribute citrus-like sensory notes, often associated with grapefruit type nuances. The identity of this compound is confirmed by authoritative chemical databases, and it is referenced in flavour ingredient inventories used by food regulatory bodies, indicating its relevance in food formulation and flavour science. Its various systematic names reflect its structure as an octahydronaphthalenone derivative with specific stereochemistry, which influences its aroma and functional properties in formulated products. Although not a mainstream bulk ingredient like sugar or salt, DIHYDRONOOTKATONE functions as a nuanced component in aroma modulation where subtle citrus or fruit-like notes are desired. The compound has historic use data from chemical inventories in flavour science and has been evaluated by expert committees for safety at typical exposure levels when used in foods. Globally, such compounds are catalogued and assessed by food safety authorities and expert panels to ensure appropriate consideration of their intended use and exposure context. DIHYDRONOOTKATONE’s inclusion in flavouring agent lists underscores its role within the broader family of volatile compounds that help create or enhance desired sensory profiles. In practice, DIHYDRONOOTKATONE is part of a specialized subset of food additive ingredients that do not serve nutritional roles but are critical for achieving complex sensory experiences in food and beverage products. Its use is informed by both flavour chemistry expertise and food science research to guide formulation compatibility and sensory impact.
How It Is Made
DIHYDRONOOTKATONE is typically manufactured through synthetic organic chemistry processes, starting from precursor molecules that provide the bicyclic ketone backbone. A common industrial route involves hydrogenation or modification of nootkatone derivatives, adjusting double bonds and functional groups to yield the desired octahydronaphthalenone structure with specific stereochemistry. Such synthesis requires controlled conditions, catalysts, and purification steps to achieve high chemical purity suitable for use in flavour applications. After synthesis, the compound undergoes purification, often through distillation or chromatographic techniques, to remove by-products and achieve food-grade quality. Food ingredient specifications for flavouring chemicals like DIHYDRONOOTKATONE focus on identity, purity, and the absence of harmful impurities, aligning with international chemical standards and evaluation criteria. These specifications are documented by expert panels and committees responsible for flavouring agent assessments. Manufacturers producing DIHYDRONOOTKATONE for food use must adhere to good manufacturing practices (GMP) to ensure consistency and compliance with regulatory expectations. Although specific production volumes may be low compared to bulk food chemicals, the emphasis on consistent sensory performance and safety underpins the technical processes used.
Why It Is Used In Food
DIHYDRONOOTKATONE is used in food products because it contributes specific aromatic qualities that enhance or complement other flavour notes. In formulation science, flavouring agents like this compound are added at very low levels to impart or intensify citrus-like or green fruit attributes without contributing calories or bulk. Such compounds allow flavourists and food developers to construct complex sensory profiles that appeal to consumer preferences. The use of DIHYDRONOOTKATONE and similar aroma chemicals enables food and beverage manufacturers to simulate natural flavour perceptions in products such as beverages, confectionery, and dairy alternatives. By combining multiple flavouring agents, manufacturers can approximate the taste experience of whole fruits or botanical extracts in cost-effective and stable formats that perform reliably across processing conditions. Because sensory qualities are multifaceted and subtle, the inclusion of specific flavouring agents is guided by flavour expertise, balancing stability, interaction with other ingredients, and performance throughout shelf life. DIHYDRONOOTKATONE’s particular sensory attributes make it a useful tool in the flavourist’s toolkit when designing distinctive and appealing flavour profiles.
Adi Example Calculation
An illustrative calculation for acceptable daily intake (ADI) involves taking a hypothetical ADI value determined by a regulatory body and applying it to a given body weight. For example, if an expert body established an ADI of X mg per kilogram of body weight per day for a flavouring agent, a person weighing 70 kg could theoretically consume 70 times X milligrams per day without exceeding that ADI value. However, because DIHYDRONOOTKATONE has been assessed as posing no safety concern at current levels of intake rather than assigned a specific numeric ADI, this example remains illustrative rather than directly applicable. Such calculations help contextualize regulatory assessments for consumers and professionals alike. They also demonstrate how safety factors translate experimental toxicology data into exposure guidelines that inform regulatory and food safety decisions.
Safety And Health Research
Safety assessments of flavouring agents, including DIHYDRONOOTKATONE, typically involve evaluation of toxicological data, metabolism, and exposure. Expert committees such as JECFA consider studies on genotoxicity, acute and chronic toxicity, and other relevant endpoints when determining whether a substance raises concern at levels encountered in food consumption. For DIHYDRONOOTKATONE, the JECFA evaluation concluded that current levels of intake as a flavouring agent do not raise safety concerns, indicating that available data did not identify adverse effects at those estimated exposures. Research on specific health endpoints for individual flavouring agents can be limited because the primary focus of toxicological evaluation is ensuring that exposures from intended use are well below levels associated with adverse outcomes in experimental systems. Food scientists and toxicologists interpret such data in the context of conservative safety margins to inform evaluations performed by expert bodies. In the absence of specific regulatory numerical limits, the expert consensus statements provide context for risk assessment. Because flavouring agents are typically used at very low levels, systemic effects from normal food consumption are unlikely based on expert evaluations. The International scientific community continues to review new data as it emerges, updating assessments when warranted by evidence.
Regulatory Status Worldwide
At the international level, DIHYDRONOOTKATONE is listed in flavouring agent evaluations and inventories maintained by expert panels and committees that inform regulatory frameworks. For example, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated DIHYDRONOOTKATONE as a flavouring agent and concluded that it poses no safety concern at current levels of intake when used for this purpose, based on the available evaluation summary. This JECFA entry (number 1407) reflects expert review of toxicological and exposure data relevant to its use as a flavouring agent in foods. In the United States, DIHYDRONOOTKATONE appears in the Substances Added to Food inventory (formerly EAFUS) with associated FEMA numbers and JECFA evaluation references, indicating its recognition within regulatory and industry datasets. However, inclusion in the inventory does not by itself constitute a direct FDA regulatory approval; rather, it indicates that the compound has been catalogued with relevant flavour expert evaluations. The absence of a specific CFR regulation listing does not preclude its use under conditions consistent with general flavouring practices and current expert evaluations. Different countries and regions may have their own regulatory approaches to flavouring agents. DIHYDRONOOTKATONE’s safety assessment by recognized expert committees supports its continued use in flavour applications where exposure is low and consistent with typical usage patterns.
Taste And Functional Properties
DIHYDRONOOTKATONE is characterized by a citrus-like, green aroma reminiscent of grapefruit or citrus peel, making it valuable for imparting such notes in flavour blends. Its organoleptic properties are a result of its molecular structure, which interacts with olfactory receptors associated with fruity and citrus perceptions. In solution, especially in oils or alcohol-based flavour carriers, this compound contributes subtle top notes that can enhance overall flavour complexity. Functionally, flavouring agents like DIHYDRONOOTKATONE are used at very low concentrations, often in the parts-per-million range, because their sensory impact is strong relative to the quantity added. They are typically soluble in organic solvents and fats and may have very limited water solubility, requiring careful formulation to ensure even distribution in food matrices. Heat and pH can influence the volatility and stability of aroma compounds, so formulation scientists consider processing conditions when including DIHYDRONOOTKATONE in product recipes. Because sensory perception is subjective, the role of DIHYDRONOOTKATONE is better understood in combination with other flavouring agents rather than in isolation. Its contribution to a flavour profile is additive or complementary, supporting complexity rather than dominating the sensory experience.
Acceptable Daily Intake Explained
Acceptable daily intake (ADI) is a concept used by food safety bodies to express an estimate of the amount of a substance that can be consumed daily over a lifetime without appreciable health risk. ADIs are normally derived from toxicological studies in animals, with safety factors applied to account for uncertainties in extrapolating to humans. For many flavouring agents, specialized expert committees may conclude that current intake levels do not raise safety concerns rather than assigning a formal numeric ADI. In the specific case of DIHYDRONOOTKATONE, JECFA’s evaluations have concluded no safety concern at current intake levels when used as a flavouring agent, which serves a similar purpose to communicating that routine consumption is within safe bounds based on the available evidence. This expert conclusion considers exposure patterns in the diet and the magnitude of use in food products. It is important for consumers and food professionals to understand that ADIs are not intake targets but rather benchmarks for regulatory risk assessment. For compounds like DIHYDRONOOTKATONE, expert reviews focus on ensuring exposure from typical food use is far below levels associated with adverse effects in scientific studies.
Comparison With Similar Additives
DIHYDRONOOTKATONE can be compared with other flavouring agents used to impart citrus or fruit-like sensory notes, such as nootkatone itself and other terpene-derived ketones. Nootkatone, for instance, also contributes grapefruit-like characteristics but differs in structure and specific sensory intensity. Flavorists may use these compounds in combination or choose one over another based on the target sensory profile and stability considerations. Other citrus-related aroma chemicals like citral and limonene serve broader roles in citrus flavour profiles, but they each have distinct organoleptic properties; citral offers a lemon-like note, while limonene provides a more general citrus aroma. DIHYDRONOOTKATONE fits within this spectrum of compounds that flavourists select based on nuanced sensory effects rather than gross flavour contributions. Formulators balance volatility, sensory thresholds, and heat stability when choosing among these agents to achieve desired outcomes. Comparisons of safety evaluations show that expert bodies often assess similar compounds under the same frameworks, considering exposure levels, toxicology data, and intended use patterns. This helps inform relative risk profiles and supports informed decisions by regulatory agencies and industry professionals.
Common Food Applications Narrative
DIHYDRONOOTKATONE finds application in a range of food and beverage contexts where citrus-like aromatic notes are desired. In beverage formulations, particularly non-alcoholic drinks with fruit-forward profiles, flavouring agents such as DIHYDRONOOTKATONE help mimic natural citrus characteristics that consumers associate with freshness and fruit intensity. When blended with other citrus and fruit aroma chemicals, it supports a balanced and recognizable sensory experience. Confectionery products that aim to deliver nuanced fruit or citrus impressions also benefit from careful use of specific flavouring compounds. In sugar confections, chewing gums, and soft candies, DIHYDRONOOTKATONE can contribute to an overall flavour design that emphasizes brightness and zest without overwhelming sweetness. Its compatibility with other fruit-derived notes enables flavourists to construct layered profiles that maintain consumer appeal. Other baked goods, dairy alternatives, and snack products incorporating fruit-leaning flavours may also utilize DIHYDRONOOTKATONE at trace levels to achieve targeted sensory effects. Across these applications, the compound’s role is technical rather than nutritional, supporting the sensory goals set by product developers. Formulators take into account processing stability and interaction with other ingredients to ensure the compound delivers its intended aromatic contribution through production and shelf life.
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Safety & Regulations
FDA
- Notes: No specific FDA additive regulation citation found; appearance in inventory does not confirm formal FDA approval
EFSA
- Notes: No EFSA specific approval or E number found
JECFA
- Notes: JECFA concluded no safety concern at typical intake levels without numeric ADI
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