TRANS-ANETHOLE

CAS: 4180-23-8 FLAVORING AGENT OR ADJUVANT

TRANS-ANETHOLE is a naturally occurring aromatic phenylpropene derivative used as a flavoring agent with a sweet anise-like aroma and functional roles in food and beverage formulations.

What It Is

TRANS-ANETHOLE is a naturally occurring aromatic compound classified as a flavoring agent or adjuvant used in foods. It belongs to the phenylpropene class of organic chemicals and is characterized by its distinctive sweet, anise and licorice-like sensory profile as noted in flavor ingredient technical references. Its chemical identity is defined by the CAS number 4180-23-8, and a range of synonyms are used in regulatory and technical literature that refer to its structure and isomeric form. TRANS-ANETHOLE occurs naturally in essential oils of plants such as anise, fennel and star anise and has been historically utilized in flavoring systems and perfumery. The compound’s sensory properties and chemical class are aligned with its use in confectionery, beverages and other flavor-focused food products.

How It Is Made

TRANS-ANETHOLE can be derived from natural botanical sources or manufactured synthetically. Traditionally, essential oils that contain high fractions of trans-anethole, such as anise or fennel oil, are distilled and purified to yield the compound in high concentration. In industrial settings, synthetic pathways include chemical condensation and isomerization methods where precursor chemicals are assembled to form the aromatic phenylpropene structure. The resulting material is then purified to meet flavor industry specifications and standards. Purity requirements and specifications are often established by regulatory bodies and industry compendia to ensure safe and consistent use in food applications. The identity, purity and quality of the material are critical aspects in manufacturing and are typically verified through analytical methods such as gas chromatography or spectroscopy.

Why It Is Used In Food

TRANS-ANETHOLE is incorporated into food formulations primarily for its sweet, anise-like flavor and aromatic contribution. Flavoring agents like trans-anethole help to create and enhance specific sensory experiences in food and beverage applications, making products more appealing to consumers. Its use as a flavor adjuvant means that it is often added at low levels to balance or complement other taste components, adding complexity and depth to flavor profiles. Beyond sensory roles, its compatibility with other ingredients and stability under typical processing conditions contribute to its adoption in a variety of formulations. The compound’s versatility allows it to be used in baked goods, confections, beverages, dairy-based products, and savory applications where an anise or sweet aromatic profile is desired.

Adi Example Calculation

To illustrate how an ADI might be conceptually applied, consider a hypothetical ADI of 0.6 milligrams per kilogram of body weight per day that has been discussed in regulatory evaluations. For an adult weighing 70 kilograms, the hypothetical ADI would equate to 42 milligrams per day. This calculation is purely illustrative, using a hypothetical ADI and is not a consumption target; it underscores how regulators use body weight and ADI values to assess safety margins relative to potential dietary exposure.

Safety And Health Research

TRANS-ANETHOLE has been the subject of toxicological evaluations by expert panels including JECFA, which review data from long-term and mechanistic studies. These assessments consider endpoints such as metabolic fate, chronic toxicity, genotoxicity and liver histopathology in laboratory animals. Historical evaluations have led to temporary acceptable intake guidelines reflecting evolving scientific knowledge. Safety research continues to examine metabolic pathways and potential effects observed in high-dose animal studies, though typical exposures from food use are orders of magnitude lower than levels that elicit toxicological findings in research models. The risk assessment process focuses on hazard identification and exposure assessment to determine whether typical dietary intake poses safety concerns. This regulatory framework underscores that the technical function of trans-anethole as a flavoring ingredient has been considered in context of overall safety profiles.

Regulatory Status Worldwide

In the United States, TRANS-ANETHOLE as part of the broader class of synthetic flavoring substances and adjuvants is listed in the Code of Federal Regulations under 21 CFR 182.60, which enumerates substances that are generally recognized as safe for their intended use as flavoring agents. This listing reflects regulatory acceptance but does not establish quantitative use limitations in food products. Internationally, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated trans-anethole, assigning a JECFA reference number and providing toxicological considerations in safety assessments. A temporary acceptable daily intake range has been discussed historically in JECFA monographs, reflecting cautious regulatory evaluation. In many jurisdictions, trans-anethole is recognized within flavoring specifications and subject to national or regional guidelines governing food additive identity and purity. Regulatory acceptance is contingent on adherence to standards and specifications set by authorities that oversee food additive safety.

Taste And Functional Properties

TRANS-ANETHOLE is recognized for its characteristic sweet, anise, and licorice-like taste that lingers on the palate, which makes it a useful flavor component in foods and beverages. Its functional behavior includes imparting both aroma and taste reinforcement, particularly in systems where sweet or aromatic notes are desirable. In sensory evaluations, it contributes complexity and can augment existing flavor profiles by adding depth and distinctiveness. From a functional standpoint, trans-anethole is relatively stable under typical food processing conditions, although like many aromatic compounds it can be sensitive to oxidation and heat over extended exposure. Its solubility is generally greater in organic media and fats than in water, aligning with its use in products where it can distribute effectively within the flavor matrix.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) is a safety benchmark used by regulatory bodies to indicate the amount of a substance that can be ingested daily over a lifetime without appreciable health risk. For compounds like trans-anethole that have undergone toxicological review, ADI values or temporary ranges have been discussed based on animal study outcomes and uncertainty factors to account for interspecies differences and sensitive populations. These values are not recommendations for consumption but serve as conservative guidance to ensure consumer safety when the compound is used in food at low concentrations typical for flavoring agents.

Comparison With Similar Additives

When comparing TRANS-ANETHOLE with other flavoring agents, similarities and differences in sensory profile and functional roles become apparent. For example, compounds like vanillin provide sweet, creamy vanilla notes distinct from the anise notes of trans-anethole. Other flavor agents such as ethyl vanillin or limonene contribute different aromatic dimensions, with limonene offering citrus notes. In terms of functional use, all serve to enhance flavor complexity, but their specific aromatic contributions differ, making them complementary in formulations that blend multiple flavor agents to achieve balanced sensory outcomes.

Common Food Applications Narrative

TRANS-ANETHOLE is widely used in a range of food products where its sweet, anise-like flavor enhances consumer appeal. In confectionery, it contributes to the characteristic taste of hard candies, chewing gums, and licorice-flavored treats. In beverages, it may be used in both non-alcoholic and alcoholic formulations to impart aromatic dimension and sweetness notes. Baked goods such as cookies and pastries frequently incorporate trans-anethole-containing flavor blends to deliver nuanced profiles that consumers recognize and enjoy. Dairy-based desserts like ice creams and frozen novelties also benefit from its aromatic properties, especially in specialty flavor variations. Beyond these, sauces, gelatins, and sweet sauces can leverage trans-anethole for its balancing effect on sweet and aromatic components. Across these applications, the compound plays a role in shaping the sensory identity of the finished product.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 182.60

EFSA

  • Notes: EFSA-specific authorization and numerical ADI information not identified in available deep links

JECFA

  • Notes: JECFA evaluation exists but numerical ADI and year not extracted from d documents

Sources

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