3-N-BUTYLPHTHALIDE

CAS: 6066-49-5 FLAVORING AGENT OR ADJUVANT

3-N-BUTYLPHTHALIDE is a small organic compound used principally for its warm, spicy herbaceous flavor and aroma in food formulations as a flavoring agent, structurally classified as a substituted phthalide lactone and found naturally in celery oil and related plant sources. Its safety as a flavor ingredient has been evaluated by international expert bodies, with no concerns at typical use levels in foods.

What It Is

3-N-BUTYLPHTHALIDE is a chemical compound belonging to the phthalide class of organic molecules that are characterized by a fused benzene and lactone ring structure. It carries the CAS number 6066-49-5 and is recognized as a flavoring agent or adjuvant used to impart or enhance sensory characteristics in food products. This compound is described by several synonyms including substituted isobenzofuranones and butylphthalide variants, reflecting its structural identity as a lactone derivative with a butyl side chain. In its pure form, 3-N-BUTYLPHTHALIDE is a colorless to pale oily liquid with a distinctive warm, herbaceous, and slightly spicy odor, often associated with celery-like and phenolic sensory notes that make it useful in flavor applications. It is naturally present in volatile oils of plant sources such as celery and lovage. Its role in foods is primarily to contribute aroma and flavor complexity rather than nutritional functionality. The compound is also of interest beyond flavoring for its presence in botanical extracts and research contexts but its main industrial use relates to sensory modulation in beverages, condiments, and other flavored products.

How It Is Made

The synthesis of 3-N-BUTYLPHTHALIDE involves organic chemical processes that form the phthalide ring with an attached butyl chain. Industrially, the compound can be derived from natural precursors such as celery seed oil where it occurs as a constituent of the volatile profile, or it may be synthesized via chemical routes starting from phthalide, functionalized through appropriate substitution reactions to install the butyl group. One general laboratory approach involves bromination of a phthalide intermediate followed by reaction with an organometallic reagent to achieve the desired alkylated lactone structure. These synthetic processes yield high-purity material suitable for use in flavor applications provided appropriate quality control and purification steps are employed to meet food-grade specifications. This chemical manufacturing approach is typical for specialty flavor chemicals, ensuring consistent sensory properties and stability for formulation purposes. Regardless of origin, the manufacturing and purification of 3-N-BUTYLPHTHALIDE is conducted under conditions that control impurities and ensure the compound meets regulatory and quality requirements for use in foods and beverages, though specific food additive monographs or pharmacopeia standards for this compound are not universally established.

Why It Is Used In Food

3-N-BUTYLPHTHALIDE is used in food primarily for its flavoring properties. Its warm, herbaceous, and slightly spicy sensory character contributes desirable notes to complex flavor profiles in various food applications. Flavor chemists incorporate such compounds to enhance natural flavors, provide depth and balance to blends, and support product differentiation in categories where aromatic complexity is valued, such as in savory seasonings, beverages, and processed foods. The use of such lactone-derived flavors can help replicate or augment flavors found in botanical ingredients like celery, lovage, or other aromatic herbs, enabling more precise and consistent flavor profiles in commercial food products. Because it is potent at relatively low concentration, only small amounts are typically needed to achieve the targeted sensory effect, which can be more cost-effective than relying solely on natural extracts. Its compatibility with other flavor ingredients and its contribution to overall flavor complexity support its continued use in formulation.

Adi Example Calculation

Because expert panels have not assigned a specific numeric ADI for 3-N-BUTYLPHTHALIDE, this section describes the general approach to ADI examples rather than calculate a value for this compound. ADI calculations typically start with a no observed adverse effect level (NOAEL) from toxicological studies, then apply safety factors (often 100-fold) to account for interspecies differences and human variability. For illustrative purposes only, if a flavor compound had a NOAEL of X mg per kilogram body weight per day in animal studies, dividing by a standard safety factor of 100 would yield a hypothetical ADI of X/100. A 70 kg adult exposed at that hypothetical level would then have a daily exposure threshold of (X/100) times 70. This illustrative approach demonstrates how ADIs translate toxicology findings to risk-informed exposure guidance, emphasizing that actual use levels and exposures are typically far below such thresholds for flavor compounds.

Safety And Health Research

Safety assessments of 3-N-BUTYLPHTHALIDE focus on its toxicological profile in the context of flavor use levels rather than therapeutic or pharmacological effects. International expert committees evaluate available studies on metabolism, acute toxicity, and other endpoints to determine whether typical dietary exposures raise safety concerns. According to evaluations by bodies such as JECFA, there is no safety concern at levels of intake expected from normal use as a flavoring agent, which reflects analysis of relevant toxicological data. Much of the published research outside of flavor contexts involves studies of biological activity in pharmacological or medical research settings. These investigations often explore properties such as antioxidant activity, potential neuroprotective effects, or cardiovascular effects in model systems. Such findings are not directly applicable to safety assessments for food flavor use, but they contribute to the broader scientific understanding of the compound’s interactions in biological systems. Safety reviews specific to food additive use separate such research from regulatory evaluations focused on dietary exposure scenarios, ensuring that conclusions relate to realistic use conditions in foods.

Regulatory Status Worldwide

International regulatory evaluations have considered 3-N-BUTYLPHTHALIDE within flavoring contexts. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated this compound as a flavoring agent and concluded that it presents no safety concern at current levels of intake when used as a flavoring substance, providing a safety basis for its use in foods. This finding reflects expert panel review of toxicological data and typical exposure patterns. In the United States, the Flavor and Extract Manufacturers Association (FEMA) assigns a FEMA GRAS number to flavoring substances that have been reviewed by expert panels for safety under conditions of intended use. 3-N-BUTYLPHTHALIDE carries a FEMA GRAS designation, indicating industry recognition of its suitability as a flavoring ingredient. The U.S. FDA includes FEMA GRAS flavoring substances in its Substances Added to Food Inventory, reflecting their accepted status in food formulations. While not codified in a specific CFR section with numeric limits, its presence in flavor inventories supports its regulatory use within established safety frameworks. (FEMA

Taste And Functional Properties

3-N-BUTYLPHTHALIDE exhibits a sensory profile described as warm, herbaceous, and subtly spicy, with notes reminiscent of celery and other green, aromatic herbs. These sensory characteristics make it suitable for enhancing or complementing certain savory and complex flavor applications. In general, lactone compounds like 3-N-BUTYLPHTHALIDE are used in small quantities because of their potent aroma and flavor influence, and they contribute to the overall perception of depth and balance in a composite flavor blend. Functionally, the compound is an oily liquid with limited water solubility but appreciable solubility in organic components of food matrices, enabling it to integrate well into flavor systems where oil-soluble constituents dominate. Its behavior under heat and pH can vary depending on formulation context, but its primary utility remains as a sensory modifier rather than a functional ingredient that affects texture or stability. The compound’s relative stability in typical processing conditions supports its use in a range of food products.

Acceptable Daily Intake Explained

The concept of acceptable daily intake (ADI) is used by food safety authorities to express the amount of a substance that can be consumed daily over a lifetime without appreciable health risk, based on toxicological evidence and safety factors. For flavoring agents like 3-N-BUTYLPHTHALIDE that have been evaluated by expert panels, regulatory bodies may conclude there is no safety concern at current levels of intake rather than assign a numeric ADI value. This reflects that typical consumer exposure from use in foods is low and below levels associated with adverse effects in toxicology studies. Such determinations guide industry use and regulatory oversight without implying a recommended intake for individuals. Instead, they provide assurance that typical dietary exposure through flavored products is considered safe when the ingredient is used according to good manufacturing practices and established usage norms.

Comparison With Similar Additives

3-N-BUTYLPHTHALIDE can be compared with other lactone-derived flavoring agents such as gamma-decalactone, delta-undecalactone, and other phthalide variants used for their aromatic contributions. Lactones in general share the trait of providing rich, creamy, or herbal notes depending on their ring size and substituents, making them useful to flavorists for specific sensory effects. Gamma-decalactone, for example, delivers peachy or creamy nuances often used in fruit flavors, whereas delta-undecalactone may contribute coconut or creamy notes. In contrast, 3-N-BUTYLPHTHALIDE’s herbal and slightly spicy profile makes it more suited to savory applications. Flavorists select among these based on the desired sensory outcome, balancing intensity, compatibility, and stability in the target food matrix.

Common Food Applications Narrative

In practical terms, 3-N-BUTYLPHTHALIDE is employed in flavor formulations that seek to deliver warm, herbal, and slightly spicy aromatic notes to consumer food products. For example, flavor houses might include this compound in savory seasoning blends used in snack foods, sauces, or condiments to enhance complexity and emulate natural botanical profiles. In beverages such as savory drinks or culinary broths, it can provide accentuated herbal undertones that contribute to perceived freshness and aroma richness. Additionally, this compound might be part of flavor systems in processed foods where celery or similar herb notes are desirable but where the use of natural celery extracts is limited by cost or variability. Blended with other aroma chemicals, 3-N-BUTYLPHTHALIDE helps achieve consistent sensory outcomes across production batches and supports product positioning in markets where nuanced flavor attributes are valued by consumers.

Safety & Regulations

FDA

  • Notes: No specific CFR direct approval section could be verified; FEMA GRAS panel assessments support use as a flavoring substance at intended levels.

EFSA

  • Notes: EFSA evaluation status could not be confirmed via an authoritative EFSA opinion on this specific compound.

JECFA

  • Notes: JECFA provided qualitative safety conclusion rather than a numeric ADI at its evaluation.
  • Adi Display: No safety concern at current intake levels when used as a flavouring agent

Sources

Comments

No comments yet. Be the first to share!