CEDAR LEAF, OIL (THUJA OCCIDENTALIS L.)

CAS: 8007-20-3 FLAVORING AGENT OR ADJUVANT

Cedar Leaf Oil is a volatile essential oil obtained from the leaves and branch ends of Thuja occidentalis L. used as a natural flavoring substance and adjuvant.

What It Is

Cedar Leaf Oil (Thuja occidentalis L.) is a natural essential oil derived from the leaves and small branches of the evergreen tree Thuja occidentalis L., commonly known as white cedar. As an ingredient in food and beverage formulation, it serves as a flavoring agent or adjuvant, imparting woody, herbal and camphoraceous sensory characteristics. This ingredient is identified by its Chemical Abstracts Service (CAS) registry number 8007-20-3, and officially appears in regulatory inventories for food substances with flavoring applications. Cedar Leaf Oil is known by a number of synonyms, including cedar leaf oil, thuja oil, and oils, cedar leaf thuja occidentalis oil, reflecting its derivation from the plant and use in diverse formulations. In foods, flavoring agents like Cedar Leaf Oil are used at low levels to contribute or modify flavor profiles without contributing significant nutritional value. The oil is composed of a complex mixture of volatile constituents that together produce its characteristic aroma and taste profile. The exact composition can vary depending on botanical source, harvest conditions, and processing methods.

How It Is Made

Cedar Leaf Oil is typically obtained through steam distillation of the fresh leaves and branch ends of Thuja occidentalis L., a species of cedar native to North America. Steam distillation is a common method used to extract volatile oils from plant material without degrading heat-sensitive compounds. In this process, steam passes through the plant material, vaporizing the volatile compounds; the vapor is then condensed back into liquid to yield the essential oil. The resulting oil is a colorless to pale yellow liquid with a strong woody and camphor-like odor and taste. Its organoleptic properties are largely due to a mixture of terpenes and related volatile constituents. Purity and profile may vary depending on the source and specific distillation conditions. Careful quality control and adherence to good manufacturing practices are important to ensure consistent flavor characteristics and compliance with food-grade specifications. In industrial settings, the harvested plant material is usually air-dried for a short period to reduce moisture content before distillation. The distillate is then separated into an aqueous fraction and an essential oil fraction; the oil is collected for use in flavor formulations. The chemical composition and yield can vary with geographic source, season, and age of the trees. Standardization for food use typically focuses on sensory quality rather than chemical uniformity.

Why It Is Used In Food

Cedar Leaf Oil is used in food primarily as a flavoring substance and adjuvant to impart woody, herbaceous and aromatic notes to formulations. Flavoring agents like Cedar Leaf Oil are incorporated in products to achieve desired sensory effects, particularly where a natural or botanical profile is sought. Because it is volatile and impactful at low concentrations, only small amounts are needed to influence the overall flavor profile of a product. The use of natural flavoring agents can help manufacturers differentiate products by adding complex sensory dimensions that artificial agents may not easily replicate. In many applications, Cedar Leaf Oil is blended with other flavor ingredients to balance or modify taste and aroma profiles, contributing to unique sensory experiences in beverages, confections, and savory products. Flavoring agents do not contribute significant nutritional content but are valued for their ability to evoke specific taste impressions. The selection of Cedar Leaf Oil in a formulation reflects both its intrinsic sensory profile and the formulation goals of the product developer. Due to its strength, it is typically used sparingly, with usage governed by good manufacturing practice to achieve the intended effect without overpowering other flavor components.

Adi Example Calculation

Because Cedar Leaf Oil does not have a specific numerical ADI set in major regulatory listings, an illustrative calculation cannot be provided based on an established ADI. In general terms, a hypothetical ADI (if it existed) would be used to estimate safe intake across a range of body weights by multiplying the ADI by body weight to yield a theoretical safe daily amount. However, without an explicitly established ADI in authoritative resources, such a calculation would be speculative and is therefore not included here.

Safety And Health Research

Regulatory and safety evaluations of flavoring substances, including natural essential oils like Cedar Leaf Oil, focus on toxicological endpoints, use levels, and exposure assessments. Essential oils are complex mixtures of volatile constituents, and safety assessments consider composition, potential toxic constituents, and typical usage in food formulations. Flavoring substances used under good manufacturing practice are expected to be consumed in small quantities that minimize any risk. The Substances Added to Food inventory and related regulatory listings identify Cedar Leaf Oil as a flavoring agent evaluated for use in food, and assign identifiers such as the FEMA number that reflect industry evaluations. The FEMA expert panel process uses established approaches to assess the safety of flavoring substances based on constituent profiles and estimated intake, applying procedures such as the Threshold of Toxicological Concern (TTC) where appropriate. (FEMA) Toxicological data from non-food contexts indicate that Cedar Leaf Oil can be an irritant and has potential toxicity at high doses when directly exposed or ingested in large quantities, but such exposures are orders of magnitude higher than typical flavoring use levels. Available safety evaluations rely on established scientific methods to ensure that use as a flavoring agent does not pose a safety concern when used at the minimal levels needed to achieve intended sensory effects.

Regulatory Status Worldwide

In the United States, Cedar Leaf Oil as a flavoring substance is listed under 21 CFR 172.510 as a natural flavoring substance and natural substance used in conjunction with flavors that may be safely used in food in accordance with good manufacturing practice. Section 172.510 allows natural flavoring substances, including plant-derived oils, to be used at levels that achieve their intended effect and comply with safety principles outlined in the regulation. This listing does not provide specific numerical use limits but requires adherence to good manufacturing practice. (21 CFR 172.510) Regulatory inventories, such as the FDA's Substances Added to Food database, include Cedar Leaf Oil with its CAS registry number and identify it as a flavoring agent. The Flavor and Extract Manufacturers Association (FEMA) has assigned a reference number (FEMA 2267) to Cedar Leaf Oil, indicating evaluation for use as a flavor ingredient; these evaluations inform safety and usage practices within the flavor industry. (FEMA) Outside the United States, regulatory status may vary by jurisdiction. Some regulatory bodies maintain databases of flavoring substances with specifications or reviews, but explicit additive listings can differ. For example, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) database is searchable for flavoring specifications, though specific detailed entries for some essential oils may not be readily available without direct database search. (世卫组织应用程序) In general, flavoring substances like Cedar Leaf Oil must comply with relevant food additive or flavoring regulations in each market where products are sold, including maximum use levels and purity criteria where specified.

Taste And Functional Properties

Cedar Leaf Oil has a distinctive sensory profile characterized by woody, herbal, camphoraceous and slightly spicy notes. These sensory properties derive from its complex mixture of volatile organic compounds that contribute both aroma and taste perceptions when used in food formulations. The strong and characteristic aroma means it is effective at low usage levels, making it suitable as a flavoring component or adjuvant in blend systems. Functionally, the oil is soluble in most fats and non-polar media, which allows it to disperse in oil-based and emulsified food systems. Its volatility contributes to its aroma delivery, but also means that some of its sensory impact can be modified during heat processing if used in cooked products. As with many essential oils, the stability of specific constituents can vary with exposure to light, heat, and pH, so formulation considerations must account for processing conditions. Despite its utility in flavoring applications, Cedar Leaf Oil must be used in compliance with applicable regulatory provisions, and at levels that achieve the desired sensory contribution without introducing off-notes or safety concerns. Sensory panels and analytical profiling are often used to optimize the use of oils like Cedar Leaf Oil to ensure consistent performance across production batches.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) is a regulatory concept used by food safety authorities to express the amount of a substance that can be consumed daily over a lifetime without appreciable risk, based on available toxicological data and applying conservative safety factors. For many natural flavoring substances, specific numerical ADIs may not be established, particularly when use levels are low and exposures through food are minimal. In such cases, regulatory frameworks rely on good manufacturing practice and safety evaluations rather than quantitative ADI values. Flavoring substances approved under natural substance provisions like 21 CFR 172.510 do not typically carry explicit numerical ADIs in the regulation; instead, their use is governed by principles that ensure safety under intended conditions of use. The concept of ADI helps stakeholders understand how regulatory authorities evaluate safety: starting with toxicological studies and then applying uncertainty factors to account for differences between test conditions and human exposure.

Comparison With Similar Additives

Natural flavoring substances such as Cedar Leaf Oil can be compared with other plant-derived essential oils used in food to illustrate differences in sensory profiles and regulatory context. For example, orange oil (Citrus sinensis peel oil) provides citrus notes and is often used in confections and beverages; it has a different volatile profile and sensory character than Cedar Leaf Oil, which contributes woody and herbal notes. Another comparator is sage oil, a botanical oil with herbal and slightly savory nuances that may be used in savory blends and some beverage applications. While both substances are natural essential oils, their sensory impacts differ due to distinct constituent profiles. Both are listed under natural flavoring substance provisions, meaning they are evaluated for use in food at good manufacturing practice levels rather than through specific numeric usage limits. Comparisons with other essential oils help formulators select appropriate flavoring agents based on desired sensory outcomes while considering regulatory frameworks that govern natural flavor use in food. These comparisons emphasize sensory functionality more than quantitative regulatory thresholds, which vary by substance and jurisdiction.

Common Food Applications Narrative

Cedar Leaf Oil finds application as a natural flavoring substance in a variety of food and beverage categories where botanical or woody aromatic notes are desired. In beverage formulations, particularly non-alcoholic drinks that aim for complex flavor profiles, Cedar Leaf Oil can contribute subtle herbal and woody accents that enhance berry or botanical blends. Similarly, in confectionery products such as hard candies or gum bases with botanical themes, small amounts of natural oils like Cedar Leaf Oil may be used to differentiate the sensory experience. In savory products designed to evoke earthy or herbal characteristics, Cedar Leaf Oil can be part of a flavor blend that amplifies other natural spices and extracts. Its functionality as a flavor adjuvant also makes it useful in seasoning mixes, where it can help bridge flavors between different botanical notes. For example, in sauces or dressings with an herbal focus, Cedar Leaf Oil may complement other essential oils to round out the aromatic profile. Manufacturers typically use Cedar Leaf Oil in products marketed for their natural flavoring content, aligning with consumer interest in botanical and plant-derived ingredients. Usage levels are kept low to maintain sensory balance, and it is rarely used in isolation but rather as part of a curated flavor blend. Across these applications, formulators consider both the volatile nature of the oil and its sensory impact to ensure consistent quality and consumer appeal.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.510

EFSA

  • Notes: EFSA specific evaluation not found in d sources

JECFA

  • Notes: JECFA specific entry for this flavoring not found in d sources

Sources

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