BUTYL BUTYRYLLACTATE

CAS: 7492-70-8 FLAVORING AGENT OR ADJUVANT

Butyl butyryllactate (CAS 7492-70-8) is a synthetic ester used as a flavoring agent with creamy, buttery sensory notes in food formulations.

What It Is

Butyl butyryllactate is an organic ester compound identified by the Chemical Abstracts Service number 7492-70-8 and classified as a flavoring agent or adjuvant. The structure of this compound consists of a lactate and butyrate moiety linked through ester bonds, which gives it distinctive sensory properties that make it valuable in food flavor applications. It is known by several synonyms that reflect its chemical identity and functional use, including butanoic acid, 2-butoxy-1-methyl-2-oxoethyl ester and 2-butoxy-1-methyl-2-oxoethyl butanoate, butyric acid ester with butyl lactate. These alternative names highlight the ester components of the molecule and its relationship to both butyric acid and lactic acid derivatives. In its pure form, butyl butyryllactate typically appears as a clear to slightly yellow liquid with a mild, ester-like odor. The compound’s sensory profile is often described as creamy, buttery, or dairy-like, making it particularly useful in enhancing or mimicking such flavor notes in various food products. Because of this sensory profile, it is widely studied and catalogued in flavor and fragrance reference databases, where it is assigned identifiers such as the FEMA number 2190 and the JECFA number 935, indicating its recognition within expert committees focused on food additive safety and usage. Its use as a flavoring agent places it among a class of synthetic esters that contribute specific organoleptic characteristics to foods without contributing significant nutritive value. Although some esters naturally occur in foods, butyl butyryllactate is primarily synthesized industrially to provide consistent quality and sensory impact. In regulatory contexts, the compound is included in lists of substances permitted for use as flavoring agents under defined conditions, reflecting a history of review by food safety authorities. This regulatory recognition underscores its functional importance in food science and its controlled acceptance for food use in compliance with good manufacturing practices.

How It Is Made

Butyl butyryllactate is manufactured through chemical esterification processes involving butyric acid derivatives and butanol or related alcohols under catalytic conditions. One common industrial route involves reacting lactic acid or its derivatives with butanol in the presence of an acid catalyst such as sulfuric acid to form the ester linkage that defines butyl butyryllactate. This reaction combines the carboxylic acid functional group of butyric or lactate precursors with the hydroxyl group of butanol to yield the ester product, with water generated as a byproduct. Purification steps such as distillation or solvent extraction are then employed to achieve the desired level of chemical purity suitable for use in food flavorings. Industrial-scale synthesis typically occurs in controlled facilities that adhere to standardized food-grade production practices. These processes aim to minimize impurities and ensure batch consistency so that the final flavoring ingredient meets established quality specifications. The Food Chemical Codex and other compendia of flavor ingredients provide quality standards and analytical methods that producers use to verify identity, purity, and safety characteristics during manufacturing. Standard operating procedures also address storage and handling to preserve the compound’s sensory properties and prevent degradation. The manufacturing route and quality control measures reflect the compound’s utility as a flavoring agent; ester synthesis is a well-understood category of reactions in organic chemistry, and practitioners in the flavor industry adapt these methods to produce a variety of ester-based aroma chemicals. By varying the specific acid and alcohol precursors, different esters with unique sensory profiles can be synthesized. Butyl butyryllactate’s creamy, buttery aroma is the result of its particular molecular structure, and controlled synthesis ensures that this profile is consistently reproduced for formulation into food flavor blends.

Why It Is Used In Food

Butyl butyryllactate is used in food because it imparts creamy, buttery, and dairy-like sensory notes that enhance flavor profiles in a variety of applications. Food formulators incorporate it into flavor blends to achieve specific organoleptic effects, particularly when a rich, dairy-like character is desired without adding actual dairy ingredients. Its sensory impact is valuable in baked goods, confectionery, dairy analog products, and other applications where buttery or creamy nuances contribute to consumer appeal. The efficacy of butyl butyryllactate as a flavoring agent rests on its capacity to interact with olfactory and taste receptors in ways that are perceived as natural or familiar sensory experiences. In practice, this means formulating it at levels that provide detectable aroma or taste enhancement without overpowering the overall flavor balance. Because it is a synthetic compound, manufacturers can control its concentration and consistency, making it a reliable tool in flavor creation and customization. Regulatory frameworks that permit the use of synthetic flavoring agents under defined conditions support its practical application in food. Inclusion in lists of substances regulated for flavor use allows formulators to apply good manufacturing practices to determine appropriate usage levels, ensuring that the compound is employed only in quantities necessary to achieve the intended sensory effect. This controlled use aligns with broader food industry practices that balance sensory quality with safety and regulatory compliance.

Adi Example Calculation

Because butyl butyryllactate does not have a specific numeric Acceptable Daily Intake (ADI) established by global expert committees due to conclusions that typical intake poses no safety concern, illustrative ADI calculations using body weight are not provided. Regulatory evaluations focus on ensuring that usagelevels in food remain minimal and in accordance with good manufacturing practice. In such cases, exposure assessments consider typical formulation concentrations and consumer consumption patterns to confirm that actual intake remains well below levels of concern as determined through risk assessment frameworks.

Safety And Health Research

Studies and expert evaluations of butyl butyryllactate focus primarily on its safety as a flavoring agent rather than specific health effects. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) reviewed butyl butyryllactate and determined that it does not raise safety concerns at current levels of intake when used as a flavoring agent. Such evaluations involve a review of available toxicology data, exposure considerations, and structural analog information to assess potential hazard. JECFA’s conclusion is reflected in its official evaluation documents, which provide scientific support for the compound’s use in food applications. Regulatory frameworks such as 21 CFR 172.515 in the United States establish guidelines for the use of synthetic flavoring substances, including butyl butyryllactate, under principles of good manufacturing practice. These regulations emphasize the importance of using flavoring agents at levels sufficient to produce their intended effect without exceeding what is necessary, providing a risk management approach grounded in controlled usage. The compound’s inclusion in such lists indicates that food safety authorities have determined that exposure at typical usage levels does not present an unacceptable safety risk. As with many flavoring esters, acute toxicity data and specific long-term studies may be limited, and risk assessments often consider structural similarity to other approved flavoring agents as part of the safety evaluation process.

Regulatory Status Worldwide

Butyl butyryllactate is recognized by regulatory authorities as a synthetic flavoring substance that may be used in food under specified conditions. In the United States, it is included in 21 CFR 172.515, the section of the Code of Federal Regulations that permits synthetic flavoring substances and adjuvants to be safely used in food according to principles of good manufacturing practice. This regulatory citation indicates that the compound is among those listed as acceptable for use as a flavoring agent under U.S. food additive regulations. The listing does not specify numeric usage limits within the regulation itself, but usage must adhere to minimal levels required to achieve the intended sensory effect and comply with industry practice. The provision in 21 CFR 172.515 reflects a broader set of conditions governing synthetic flavoring substances in food. Internationally, butyl butyryllactate has been evaluated by expert bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA), which has reviewed the compound’s safety profile and functional use as a flavoring agent. JECFA’s evaluation concluded that the substance presents no safety concern at current levels of intake when used as a flavoring agent. Inclusion in JECFA’s evaluations and assignment of a JECFA number provide context for its recognized status within global food additive frameworks. Regulatory recognition and expert assessment support its continued use in food flavor applications under appropriate quality and safety standards.

Taste And Functional Properties

Butyl butyryllactate is characterized by sensory properties that food scientists describe as creamy, buttery, and dairy-like. These taste and aroma descriptors arise from the ester’s interaction with olfactory receptors, resulting in perception profiles that are reminiscent of butter, cream, and related dairy notes. Such functional sensory attributes make it particularly useful when a formulation requires a rich, dairy-associated character without the addition of fats or dairy proteins. In functional terms, butyl butyryllactate is moderately soluble in organic solvents such as alcohols and fixed oils, which facilitates its integration into flavor concentrates and oil-based food ingredients. Its water solubility is limited, meaning that formulators often use it in systems where alcohol or oil carriers help disperse the compound. When incorporated into emulsions, syrups, or fat-containing matrices, the ester’s sensory impact can be effectively released during consumption. The compound’s stability is adequate for typical food processing conditions, although extreme heat or prolonged storage can potentially alter the sensory profile if the ester undergoes hydrolysis or oxidation. Flavor chemists consider these properties when selecting appropriate application matrices and dosage levels. Understanding both sensory profile and physicochemical behavior enables formulators to optimize performance in product categories such as baked goods, confections, dairy analogs, and snack foods. By balancing sensory intensity with formulation compatibility, butyl butyryllactate contributes to complex flavor landscapes in many consumer foods.

Acceptable Daily Intake Explained

An Acceptable Daily Intake (ADI) represents a regulatory benchmark that estimates the amount of a substance that can be consumed daily over a lifetime without appreciable health risk. For many flavoring agents, regulatory bodies or expert committees such as JECFA evaluate toxicology data to determine whether an ADI is appropriate. In the case of butyl butyryllactate, JECFA concluded that at current intake levels associated with its use as a flavoring agent, there is no safety concern, which suggests that conventional exposure does not necessitate a specific numeric ADI. This regulatory conclusion reflects an understanding that the compound’s use levels in food are typically low relative to thresholds of toxicological concern. Consumers and formulators should understand that the concept of ADI is not a recommended intake level but rather a conservative estimate used by regulators to manage risk. An ADI, when established, provides a context for assessing exposure from all dietary sources and comparing that exposure to levels considered safe based on scientific evaluation. The absence of a numeric ADI for butyl butyryllactate in official evaluations implies that expert committees did not identify exposure scenarios that would challenge safety margins when used as intended in food flavoring.

Comparison With Similar Additives

Butyl butyryllactate can be compared with other ester-based flavoring agents that impart buttery or creamy sensory characteristics. For example, ethyl butyrate is another ester widely used to provide fruity and creamy notes in food flavors; it is also recognized in regulatory lists and has been evaluated by expert committees for safety. Both compounds contribute specific aroma notes by virtue of their ester functional groups, though ethyl butyrate tends toward fruitier profiles while butyl butyryllactate contributes richer dairy and butter nuances. Another related compound, methyl butyrate, provides fruity and sweet notes that are useful in different flavor contexts. The functional differences among these esters stem from their molecular structures, which influence volatility, solubility, and sensory perception. These comparisons illustrate how flavor chemists select specific esters to achieve desired sensory effects in food formulations. Each compound’s regulatory status and safety evaluation history also inform its selection; many simple esters used as flavoring agents have been reviewed by bodies such as JECFA and listed in regulatory frameworks, providing confidence that they can be used safely when formulation guidelines are followed.

Common Food Applications Narrative

In the food industry, butyl butyryllactate finds application across a variety of product categories where creamy, buttery, or dairy-like flavor notes are desired. Its use is particularly common in baked goods, where the compound enhances richness and mimics the sensory qualities of butter in products such as pastries, cookies, and bread. In confectionery, including candies and sweet treats, it supports flavor profiles that benefit from creamy or dairy-associated nuances. The compound’s sensory characteristics also make it valuable in dairy analog products and dairy-flavored snacks, where formulators seek to evoke familiar tastes without relying on actual dairy ingredients. Beverage formulations that aim to deliver creamy mouthfeel or dairy-like aroma can also incorporate butyl butyryllactate in minute concentrations. In these applications, it works synergistically with other flavor components to shape the overall sensory experience, contributing to consumer perceptions of richness or dessert-like character. Ready-to-drink beverages, flavor-enhanced waters, and dairy-alternative drinks are among product types that may utilize this compound as part of a broader flavor strategy. Beyond sweet products, savory applications that benefit from buttery notes, such as certain snack foods or seasoning blends, can also employ butyl butyryllactate. In each case, the role of the compound is to enhance the sensory profile in ways that align with consumer expectations for taste and aroma. Careful formulation ensures that the additive delivers its intended effect while complying with regulatory guidelines for flavor ingredients.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: No authoritative EFSA-specific evaluation found

JECFA

  • Year: 2001
  • Adi Display: No safety concern at current intake levels when used as flavoring agent

Sources

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