ANISYL ACETATE

CAS: 104-21-2 FLAVORING AGENT OR ADJUVANT

ANISYL ACETATE (CAS 104-21-2) is an aromatic ester used as a flavoring agent in food to impart sweet, fruity and balsamic notes, permitted in synthetic flavoring substances and adjuvants under Title 21 CFR 172.515.

What It Is

ANISYL ACETATE is a defined chemical compound used primarily as a flavoring substance in food and beverage formulations. It is known by several synonyms that reflect its chemical identity, and the CAS Registry Number 104-21-2 uniquely identifies its structure as 4‑methoxybenzyl acetate. In the flavor and fragrance industry, this compound functions as a flavoring agent or adjuvant, meaning it contributes specific sensory characteristics – typically described as sweet, fruity, balsamic, or vanilla‑like aroma and taste notes – without contributing nutritional value. As a member of the ester class of organic compounds, ANISYL ACETATE is chemically derived from the esterification of anisyl alcohol (4‑methoxybenzyl alcohol) with acetic acid. Esters like this are characterized by their volatility and aromatic properties, which make them useful in modulating the sensory profile of foods and beverages. While it occurs naturally in trace amounts in some plant extracts and aromas, most commercial use involves synthesized material formulated to defined industry standards. In regulatory terms, ANISYL ACETATE is classified as a flavoring substance under food additive regulations, and in the United States it appears in food additive inventories with an assigned regulation code that describes its permitted functional use in food products. This context is essential for manufacturers and food scientists when selecting additives for product development and compliance.

How It Is Made

The commercial production of ANISYL ACETATE involves the esterification of its precursor alcohol, anisyl alcohol (also called 4‑methoxybenzyl alcohol), with an acylating agent such as acetic acid or acetic anhydride. Under controlled conditions with acid catalysis, the hydroxyl group of anisyl alcohol reacts with the acyl compound to form the ester linkage that defines ANISYL ACETATE. This reaction is a standard organic chemistry transformation widely used in the synthesis of flavor and fragrance esters. After ester formation, the product undergoes purification to meet defined specifications for flavor use. This typically involves distillation and quality control testing to ensure the material meets criteria for identity, purity, and sensory properties. Industry specifications, such as those developed by expert panels and regulatory bodies, provide guidance on acceptable impurity levels and analytical verification methods. Purity standards are important in ensuring consistent performance in food applications and maintaining safety margins. Quality control in manufacturing includes analytical testing using chromatography and spectrometry to confirm the compound’s identity and to detect trace impurities. These methods are implemented against compendial or internal specifications. Proper handling of the intermediate chemicals and the final product also includes measures to control occupational exposure and environmental release, following industry best practices and safety data requirements.

Why It Is Used In Food

ANISYL ACETATE is used in food formulation because of its desirable sensory characteristics that enhance or modify flavor profiles. As a flavoring agent, it provides sweet, balsamic, fruity, or vanilla‑like notes that can complement and round out complex flavor systems. In many food products, flavor complexity is critical to consumer acceptance, and esters like ANISYL ACETATE serve as tools for fine‑tuning these sensory attributes. Flavor chemists select ANISYL ACETATE for its particular balance of sweetness and fruit‑associated character when formulating confections, beverages, baked goods, and dairy desserts. It is often used in combination with other flavoring substances to achieve a targeted profile that may mimic natural aromas such as cherry, plum, vanilla, or almond. Its volatility and compatibility with other ingredients also influence its selection, as it must retain sensory impact through processing steps like heating or pH adjustments. The inclusion of defined flavoring agents like ANISYL ACETATE in product labeling informs both regulatory compliance and consumer transparency. In many jurisdictions, the use of such flavoring substances is subject to specific regulations that govern how they may be added to food and in what functions, reinforcing their role as non‑nutritive sensory contributors rather than conventional nutrients.

Adi Example Calculation

An illustrative calculation of theoretical daily intake helps explain how exposure estimates relate to regulatory assessments. For example, consider a hypothetical adult weighing 70 kilograms exposed to a flavoring compound at a theoretical average intake level of a few micrograms per kilogram body weight per day from foods. Multiplying the hypothetical intake rate by body weight yields an estimated total daily exposure. If this estimated exposure is substantially lower than levels tested in toxicological studies that show no adverse effects, regulators may conclude that current use levels are safe. This type of calculation does not represent a recommended intake and does not imply that specific numeric values should guide personal consumption habits. Instead, it illustrates the relationship between body weight, exposure, and safety margins used in regulatory evaluations. The actual calculation would require data on typical use levels, frequency of consumption, and other exposure factors collected by industry and evaluated by regulatory bodies.

Safety And Health Research

Safety assessments of ANISYL ACETATE have been conducted by expert panels and regulatory committees with a focus on its use as a flavoring substance. These evaluations consider toxicological data, metabolic pathways, and potential exposure levels from typical use in food products. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has included ANISYL ACETATE in its evaluations of flavoring agents and has indicated that, based on available data, its use at current levels does not raise safety concerns when applied as intended. Regulatory reviews typically examine data from animal studies, including short‑term and subchronic toxicity tests, along with information on absorption, distribution, metabolism, and excretion. These data help determine whether a compound poses risks at anticipated human exposure levels. For ANISYL ACETATE, available evaluations support its continued use under defined regulatory conditions without specific restrictions based on adverse effects. Such conclusions are reflected in regulatory listings and expert summaries. Ongoing research and surveillance by food safety authorities continue to monitor new data related to flavoring substances. This ensures that regulatory positions remain current with emerging science. However, no documented human health hazards directly attributable to ANISYL ACETATE at authorized use levels have been established in authoritative toxicological databases or regulatory evaluations.

Regulatory Status Worldwide

In the United States, ANISYL ACETATE is included in food additive inventories as a permitted synthetic flavoring substance and adjuvant. The regulatory code 21 CFR 172.515 specifically lists synthetic flavoring substances and adjuvants allowed for direct addition to food for human consumption, which encompasses ANISYL ACETATE and its functional use as a flavoring agent or adjuvant. This status reflects evaluation by the U.S. Food and Drug Administration regarding its safety for the intended use under prescribed conditions. Internationally, flavoring substances like ANISYL ACETATE are subject to regulatory frameworks that define flavorings and their use conditions. In the European Union, flavoring substances are regulated under frameworks that set general safety and labeling requirements for flavorings and food ingredients with flavoring properties, as outlined in consolidated flavoring regulation texts. These frameworks establish criteria for evaluation and inclusion in lists of permitted flavorings. At the international expert level, bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have evaluated ANISYL ACETATE as a flavoring substance. Summaries of these evaluations indicate that no safety concern has been identified at current levels of intake when used as a flavoring agent. Such assessments inform regulatory decisions and specifications for identity and purity that support global regulatory harmonization.

Taste And Functional Properties

ANISYL ACETATE has a sensory profile described by trained flavor professionals as sweet, powdery, and fruity with balsamic and vanilla‑like nuances. These characteristics enable it to enhance a broad range of flavor systems where such notes are desirable. Esters like this contribute to overall flavor impact by interacting with other components in a formulation to produce balanced and appealing sensory experiences. Functionally, ANISYL ACETATE is moderately volatile and soluble in ethanol and other flavor carriers used in food formulation. Its solubility profile makes it suitable for incorporation into liquid and semi‑solid food systems. It exhibits sufficient stability under typical processing conditions, such as moderate heat and pH changes, which is important for maintaining consistent flavor performance during manufacturing and shelf life. Sensory evaluation panels often describe the presence of ANISYL ACETATE as contributing to enhanced sweetness perception without adding caloric value. Its effects are concentration dependent, and formulation scientists adjust levels to achieve the desired sensory contribution. These properties have been characterized over many years of experience in flavor creation, and they inform practical use levels in industry applications.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) is a regulatory concept used by expert committees to describe the estimated amount of a substance that can be consumed daily over a lifetime without appreciable health risk. For many flavoring substances, regulatory bodies may establish ADIs based on comprehensive toxicological data, but for some compounds, an explicit numeric ADI may not be specified if available evidence does not indicate concern at typical levels of exposure. In the case of ANISYL ACETATE, summary evaluations by expert committees have concluded that its use as a flavoring agent at current levels does not raise safety concerns. This type of conclusion implies that exposure from normal use in food products is within safe limits when compared to available toxicological data. While a specific numeric ADI value may not be established or published for every flavoring substance, the absence of identified safety concerns in authoritative evaluations supports its regulatory acceptance within defined use categories. It is important to understand that ADIs are conservative safety benchmarks used by regulators to guide permissible uses. They are not recommended intake levels for consumers, nor are they meant to suggest that exceeding an ADI would necessarily lead to adverse effects in every instance. Instead, they provide a safety buffer based on the best available evidence and standardized assessment procedures.

Comparison With Similar Additives

ANISYL ACETATE belongs to a broader class of ester‑based flavoring substances that include other aromatic esters like ethyl acetate, benzyl acetate, and isoamyl acetate. While each of these compounds contributes a distinct sensory profile – ethyl acetate with fruity and solvent‑like notes, benzyl acetate with floral characteristics, and isoamyl acetate with banana‑like aroma – they share common functional roles as flavor enhancers. Compared to these other esters, ANISYL ACETATE’s sensory contribution is often described as sweeter and more balsamic, making it particularly suited for applications targeting fruity or vanilla‑associated profiles. Like many flavoring esters, its selection in a formulation depends on the desired sensory outcome and its stability under processing conditions. Esters with more volatile profiles may be chosen for products where rapid aroma release is desired, while those with heavier notes may be preferred in richer food matrices. Formulators often blend multiple ester flavoring agents to achieve complex profiles that cannot be delivered by a single additive. Understanding the functional differences between these chemicals allows flavor scientists to tailor formulations to consumer preferences while maintaining compliance with regulatory frameworks that govern their use.

Common Food Applications Narrative

In practical food applications, ANISYL ACETATE is incorporated into a variety of flavored food and beverage products where its sensory attributes contribute to consumer appeal. It finds utility in baked goods, where its sweet and fruity notes complement other flavor components in pastries and cookies. In confectionery, it helps to create appealing profiles in candy and gelled sweets, often paired with fruit or vanilla themes. Beverages such as flavored waters, soft drinks, and ready‑to‑drink teas may include this ester as part of a broader flavor blend to achieve a balanced aromatic profile. In dairy‑based desserts like flavored yogurts, frozen treats, and custards, ANISYL ACETATE’s sweet and balsamic characteristics augment fruit or cream notes. Snack bars and breakfast cereals also benefit from its inclusion when manufacturers aim to enhance fruit‑associated flavors. The selection of ANISYL ACETATE in these products reflects its compatibility with other ingredients and its ability to deliver consistent sensory effects at controlled use levels. Manufacturers consider both functional and regulatory aspects when using flavoring substances. ANISYL ACETATE’s permitted status in defined regulatory categories allows it to be used in product development with clear labeling and compliance frameworks. Across categories, its role is to enrich sensory appeal, support brand flavor concepts, and meet consumer expectations for taste quality.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: Specific EU flavoring substance listing not identified from available sources

JECFA

  • Notes: JECFA evaluation indicates no safety concern at current use levels but numeric ADI not specified

Sources

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