CADINENE

CAS: 29350-73-0 FLAVORING AGENT OR ADJUVANT

CADINENE (CAS 29350-73-0) is a synthetic flavoring agent permitted in food under Title 21 CFR 172.515 and identified in flavoring databases as a woody aromatic compound used to contribute taste and aroma in formulations.

What It Is

CADINENE is a chemical compound classified as a flavoring agent or adjuvant used in food systems to impart or enhance aromatic and taste properties. It is identified by the CAS number 29350-73-0 and is known by systematic chemical names including a decahydro‑dimethyl‑isopropyl derivative of naphthalene. In flavoring inventories, such as those maintained by the U.S. Food and Drug Administration (FDA), CADINENE appears under food additive listings for synthetic flavoring substances and adjuvants, indicating its regulatory recognition for food use under prescribed conditions. Its inclusion in regulatory texts reflects its role as an ingredient that could contribute sensory character to food products when used at levels consistent with good manufacturing practice. While it is not assigned an INS (International Numbering System) number that is commonly applied to food additives such as colorants or preservatives, it is recognized in flavoring compendia and defined chemical inventories relevant to the flavor industry such as FEMA (Flavor and Extract Manufacturers Association) listings and JECFA evaluations for flavoring agents. CADINENE’s chemical identity and classification underscore its specificity as a flavoring compound rather than a nutritive ingredient or nutritional additive, and its use is generally confined to sensory modification of food products.

How It Is Made

The production of CADINENE for flavor use typically involves organic synthesis or isolation from natural sources where it occurs in trace amounts in certain essential oils. In industrial contexts, CADINENE can be obtained through chemical synthesis routes that build the bicyclic hydrocarbon structure with specific stereochemistry, or by fractionation and purification from plant essential oils where related sesquiterpene hydrocarbons are present. Essential oils from plant sources such as juniper, patchouli, and similar botanicals may yield various cadinene isomers that serve as starting points for further purification. The manufacturing processes for flavoring ingredients like CADINENE prioritize consistency in sensory qualities, appropriate purity, and stability under heat and formulation conditions. Quality specifications often control aspects such as the proportion of isomeric forms, residual solvents, and impurities, to ensure that the material performs reliably in flavor applications. Isolation from natural sources usually requires solvent extraction and distillation techniques, followed by chromatographic purification. Synthetic routes may involve cyclization and hydrogenation steps guided by structural requirements. Quality control measurements, such as gas chromatography and mass spectrometry, confirm that the compound meets flavor industry standards before it is blended into flavor formulations. Although CADINENE is used in relatively low concentrations, ensuring its identity and quality is critical because variations in its composition can affect flavor perception in the final product.

Why It Is Used In Food

CADINENE is used in the food industry primarily for its ability to contribute aromatic depth and complexity to flavor profiles. Its sensory attributes are described as woody and terpenic with a characteristic base note that can enhance the perception of other flavor ingredients. In complex flavor blends, CADINENE can act as a fixative that helps stabilize and sustain aroma over time, which is particularly useful in products requiring prolonged shelf life or heat processing. Food formulators may choose CADINENE when developing flavor systems that benefit from a woody, herbal, or slightly spicy accent, and it is often paired with other terpenoid or aromatic compounds to build layered sensory experiences. The use of CADINENE also aligns with flavor development strategies that seek to balance top, middle, and base notes in a flavor profile, whereby it contributes structural depth at lower perceptual frequencies. Regulatory inventories, such as the FDA’s allowable food additive list under Title 21 CFR 172.515, acknowledge CADINENE’s safety for use as a synthetic flavoring substance when used in accordance with good manufacturing practice, meaning it should be used at the minimum effective level necessary to achieve the desired sensory effect. CADINENE’s inclusion in flavor formulations reflects its value to sensory design, not as a macronutrient or primary component of food, but as a contributor to consumer sensory experience and product character.

Adi Example Calculation

An illustrative example of how ADI concepts are applied (though no numeric ADI is established for CADINENE itself) is to imagine a hypothetical adult weighing 70 kilograms. If a flavoring substance were assigned a numeric ADI of 0.1 milligrams per kilogram of body weight per day, that person’s theoretical maximum safe intake would be 7 milligrams per day. In the case of CADINENE, regulatory evaluations conclude there is no safety concern at current intake levels because the compound is typically present in foods at microgram‑per‑serving amounts, far below hypothetical ADI thresholds. This example illustrates how safety margins are conceptualized: actual exposure through diet is orders of magnitude lower than doses associated with potential adverse effects in toxicological experiments. Such illustrative calculations help contextualize why regulators may determine that trace use of a flavouring agent like CADINENE does not require a specific numeric ADI, even as they affirm its safety under standard conditions of use.

Safety And Health Research

Safety evaluations of CADINENE focus primarily on its use as a flavoring agent at trace levels typical in food products, rather than on toxicological endpoints associated with high‑dose exposures. Regulatory bodies such as the FDA and JECFA review available chemical and toxicological data to determine whether the compound can be safely used under conditions of intended use. The JECFA evaluation, for instance, identified no safety concern at current levels of intake when CADINENE is used as a flavoring agent, reflecting an assessment of available studies and exposure estimates. Toxicology research for flavoring agents generally examines endpoints such as genotoxicity, chronic toxicity, and potential organ system effects, but specific published toxicological data for CADINENE at dietary exposure levels recognized by regulators are limited. Because CADINENE is used in very low amounts within complex flavor blends, actual dietary exposure tends to be well below levels that would warrant safety issues. Hazard assessments take into account the compound’s chemical structure, metabolic pathways, and any available animal or in vitro studies, with regulatory conclusions aimed at ensuring an adequate margin of safety. At typical use levels, CADINENE contributes sensory attributes without exerting direct pharmacological or physiological effects. However, as with all flavoring substances, continuing monitoring of scientific data and adherence to good manufacturing practices are integral to maintaining confidence in its safe use in food applications.

Regulatory Status Worldwide

In the United States, CADINENE is listed in the FDA’s Substances Added to Food (formerly EAFUS) database as permitted for use as a synthetic flavoring substance and adjuvant under Title 21 CFR 172.515, which governs synthetic flavoring agents and related substances. This regulatory entry indicates that CADINENE can be used in food formulations at levels consistent with good manufacturing practice to achieve the intended sensory effect without posing safety concerns under those specified conditions. In the European Union, CADINENE does not have a specific E‑number designation under EFSA’s additive categories; rather, it is evaluated within flavoring compound inventories and flavoring sources that may be permitted under general flavoring regulations, with overall safety assessments conducted by panels familiar with flavoring agents. At the international level, the FAO/WHO Joint Expert Committee on Food Additives (JECFA) evaluated CADINENE in conjunction with other structurally related flavoring agents and concluded that there is no safety concern at current levels of intake when used as a flavoring agent based on available data and usage patterns. Because such evaluations focus on sensory use levels rather than direct nutritive impact, they support its inclusion in flavoring portfolios globally, provided that manufacturers adhere to recognized safety and quality guidelines. Regulatory frameworks emphasize that CADINENE should be used in the smallest effective amount and that labeling and safety data requirements are met as part of compliance with local food additive laws.

Taste And Functional Properties

Sensory descriptions of CADINENE consistently highlight its woody, herbal, and terpenic aroma characteristics, which can translate into flavor notes in food applications when used in minute quantities. Its functional behavior in formulations is influenced by its chemical stability; CADINENE resists thermal degradation and retains its aromatic properties under typical food processing conditions such as heating and baking, making it suitable for applications like confectionery, baked goods, and savory seasonings where processing temperatures can be high. In flavor systems, CADINENE interacts with other volatile and semi‑volatile compounds, contributing to the base and middle notes of a flavor profile rather than dominating with sharp top notes. Its solubility profile—generally more compatible with alcohol and lipid phases than with water—means it is often blended into solvent carriers or lipid‑based flavor premixes prior to incorporation into water‑rich food matrices. Due to its hydrophobic nature, CADINENE may partition differently in emulsions, gels, and other heterogeneous food systems, influencing how quickly its aroma is released during consumption. Flavor chemists consider such properties when designing products to ensure that CADINENE’s notes complement other ingredients and contribute to a cohesive sensory perception. Because CADINENE is typically used at very low concentrations, its functional contribution is subtle and aimed at rounding out or enhancing a broader flavor bouquet rather than imparting a strong standalone taste.

Acceptable Daily Intake Explained

The concept of acceptable daily intake (ADI) is a regulatory health benchmark that represents the amount of a substance that can be consumed daily over a lifetime without appreciable health risk, based on toxicological data and safety factors. For many flavoring agents like CADINENE, specific numeric ADIs are not established because their use levels in foods are extremely low and their exposure through diet is minimal compared with levels associated with safety concerns. Instead, regulatory evaluations—such as those conducted by JECFA—may conclude that there is "no safety concern at current levels of intake" when the compound is used as intended. This type of conclusion serves a similar purpose to an ADI by indicating that routine dietary exposure is not expected to pose health risks under typical usage patterns. The absence of a numeric ADI for CADINENE thus reflects the combination of low exposure and a lack of evidence of toxicity at relevant intake levels rather than a known threshold of effect. In practical terms, food manufacturers are guided to use CADINENE at the minimum level necessary to achieve the desired flavour effect, consistent with principles of good manufacturing practice, rather than aiming for a target ADI. Consumers encountering CADINENE in flavored products ingest only trace amounts, and regulatory frameworks are designed to ensure that such levels remain well within safety margins, with ongoing review as new scientific data emerge.

Comparison With Similar Additives

CADINENE shares functional similarities with other terpenoid flavoring agents used in food systems, such as alpha‑pinene, limonene, and linalool. Like CADINENE, these compounds contribute characteristic sensory notes—woody, citrusy, or floral—at low concentrations in complex flavour blends. Alpha‑pinene, for example, offers a pine‑like scent often used in savory and beverage applications, while limonene contributes citrus top notes in confectionery and beverage products. Linalool, on the other hand, imparts floral and slightly spicy notes useful in bakery and beverage systems. Compared with these agents, CADINENE’s woody and herbal profile situates it more within base note contributors rather than sharp top notes, making it valuable for rounding out flavour profiles rather than dominating them. Additionally, regulatory evaluations for such terpenoid flavouring agents often conclude minimal safety concerns at typical intake levels, reflecting similar patterns of low dietary exposure and supportive toxicological data. When formulating multi‑component flavour systems, food chemists may select combinations of these agents to achieve balanced sensory outcomes that resonate with target product profiles while ensuring compliance with regulatory safety expectations.

Common Food Applications Narrative

CADINENE finds application in a range of flavored food products where its woody and complex aromatic character can enhance consumer sensory perception. In confectionery items such as hard candies, chewing gums, and chocolate coatings, it serves as a background note that reinforces or rounds out fruity, spicy, or herbal flavor themes when paired with other flavor components. Its stability under heat makes it suitable for incorporation into baked goods, including cookies, crackers, and pastries, where sustained release of aromatic compounds during consumption improves overall flavor impact. Beverage applications may include flavored soft drinks, specialty teas, and alcoholic beverage flavorings, where CADINENE’s depth can help balance sweetness or accentuate botanical notes. In savory products such as snack seasonings and prepared sauces, its woody nuances may contribute to complexity alongside umami and spice elements. Dairy‑based products like ice creams and flavored yogurts also benefit from its ability to add subtle base notes that support primary flavor profiles such as vanilla, caramel, or spice blends. Chewing gum and breath products formulated to provide layered sensory experiences may include CADINENE in their flavor systems to achieve sustained aromatic release. In each of these broad categories, CADINENE is not the dominant flavor but part of a concerted blend of compounds that together create a harmonious and appealing sensory profile. The products that contain CADINENE illustrate how flavor chemistry leverages trace compounds to shape the overall consumer experience.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: EFSA regulatory status not specifically documented

JECFA

  • Notes: JECFA concluded no safety concern at current levels of intake without numeric ADI
  • Adi Display: No safety concern at current levels of intake when used as a flavouring agent

Sources

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