DIALLYL TRISULFIDE

CAS: 2050-87-5 FLAVORING AGENT OR ADJUVANT

**Diallyl Trisulfide** is an organosulfur compound primarily associated with Allium plants such as garlic and onion. It functions as a flavoring agent due to its characteristic sulfurous aroma and taste and is used as an adjunct in some flavor formulations. It has also been the subject of scientific investigations relating to its biological activity, including roles as a hydrogen sulfide donor and other biochemical interactions. Its regulatory use in food varies globally and must be understood in the context of flavoring substance evaluation and permissible use conditions.

What It Is

Diallyl Trisulfide is a naturally occurring organosulfur compound with the CAS registry number 2050-87-5 that has been identified in garlic (Allium sativum) and other members of the Allium genus. Chemically, it belongs to the class of polysulfide compounds, characterized by three sulfur atoms linking two allyl groups. It is recognized in flavor science and regulatory listings as a substance with sensory properties, particularly contributing sulfurous, garlic-like notes to mixtures where it is included for flavor impact. The compound has multiple synonyms relating to its chemical structure, including allyl trisulfide, di-2-propenyl trisulfide, and others, reflecting alternate nomenclature traditions in organic chemistry. As a technical function in foods, diallyl trisulfide is categorized as a flavoring agent or adjuvant, meaning it is employed in food formulation to contribute to or modify sensory attributes. Flavoring agents are substances that impart taste or aroma and are used in a wide array of food products to achieve desired organoleptic properties. Diallyl trisulfide’s inclusion in this class signifies that its primary purpose in food systems is sensory enhancement rather than nutritional contribution or preservation. Beyond food, diallyl trisulfide appears in chemical literature in contexts ranging from analytical chemistry to research into its biological activity. In food regulatory listings, it may appear with reference numbers assigned by flavor industry expert panels, indicating its evaluation status in flavor use inventories. The molecular profile and sensory characteristics of diallyl trisulfide have been documented by flavor and chemical data sources, which note its sulfurous odor and functional use in flavoring applications. Its presence in garlic essential oil and related natural extracts underpins its sensory significance in culinary traditions where Allium-derived flavor is valued. This contextual background situates diallyl trisulfide within the broader family of organosulfur flavor compounds that contribute to the characteristic sensory profiles of onions, garlic, and related foods.

How It Is Made

Diallyl Trisulfide, in the context of flavor and chemical production, is typically obtained either through extraction from natural sources or via controlled chemical synthesis. In nature, it arises from the breakdown of precursor compounds such as allicin, which itself forms when garlic tissues are disrupted and enzymatic reactions transform alliin into a suite of sulfurous products. This natural metabolic route in garlic and related Allium plants yields diallyl trisulfide alongside other sulfur-containing molecules that collectively contribute to the characteristic aroma and taste of these plants. For commercial flavor applications where a consistent and defined supply is necessary, diallyl trisulfide may be produced via synthetic pathways that start from allylic precursors and incorporate sulfur units in controlled reactions. The synthesis of organosulfur compounds typically involves combining allylic hydrocarbons with elemental sulfur or sulfur-containing reagents under carefully managed conditions to form polysulfide linkages. These processes are designed to yield the trisulfide structure with minimal by-product formation and to meet purity specifications suitable for flavor use. The resulting compound is then purified, often by distillation or chromatography, to achieve the quality standards required for flavor applications. Purity specifications for flavoring agents generally focus on the absence of undesirable impurities and consistent sensory performance. Regulatory contexts often emphasize that substances used as flavoring agents should be of food-grade quality and produced under good manufacturing practices to ensure safety and consistency. This means that the manufacturing environment, raw materials, and analytical verification methods must align with standards appropriate for ingredients intended for consumption. In practice, diallyl trisulfide used in flavor formulations is sourced from suppliers who characterize it for sensory use and provide documentation regarding its composition and quality attributes. In summary, while diallyl trisulfide is naturally occurring in Allium plants, industrial production leverages both natural extraction and synthetic methods to supply the compound for flavor applications. The choice of production route depends on economic, sensory, and regulatory considerations, with a focus on delivering a product that meets the specific requirements of flavor formulators and adheres to applicable standards for food ingredients.

Why It Is Used In Food

Diallyl Trisulfide is used in food primarily for its role as a flavoring agent that contributes distinctive sulfurous and savory notes to formulations. Flavoring agents are substances added to food to enhance aroma and taste without substantially affecting nutritional content. In culinary traditions, sulfur-containing compounds derived from plants like garlic and onion are valued for the depth and complexity they bring to savory dishes. Diallyl trisulfide captures some of these sensory attributes and can be employed in flavor blends to simulate or reinforce garlic-like profiles. The inclusion of diallyl trisulfide in flavorings aligns with broader formulation practices where individual chemical components are selected based on their sensory impact and compatibility with other ingredients. These selections are guided by flavor chemists who understand how specific molecules interact in complex food matrices under different processing conditions. In practice, diallyl trisulfide may be incorporated into flavor concentrates used in snack seasonings, savory sauces, condiments, and other products where a pronounced sulfurous or Allium-inspired note is desirable. Flavoring agents like diallyl trisulfide can be used in minute concentrations due to their potent sensory characteristics. Even at low levels, they can significantly influence the overall perception of a food's aroma and taste. This allows formulators to achieve target sensory profiles while controlling cost and ensuring that the additive does not overwhelm other elements of the product’s flavor. The functional rationale for using diallyl trisulfide is similar to that of other sulfurous flavor compounds: it contributes specific odor and taste qualities that are culturally and gastronomically associated with certain savory foods. Another reason for its use is the consistency it provides when natural ingredients alone may vary in composition due to agricultural, seasonal, or processing differences. By incorporating defined flavor compounds such as diallyl trisulfide, manufacturers can achieve more uniform sensory outcomes across production batches. In summary, diallyl trisulfide is valued in flavor formulations for its characteristic sensory properties, its potency in small amounts, and its role in helping products meet specific flavor objectives in a predictable manner.

Adi Example Calculation

To illustrate how an Acceptable Daily Intake (ADI) is used in practice, consider a hypothetical scenario based on a substance with an established ADI. Suppose a flavoring compound has an ADI of X milligrams per kilogram of body weight per day. For an adult weighing 70 kilograms, the maximum safe daily intake would be calculated by multiplying the ADI value by body weight, resulting in 70 times X milligrams per day as a theoretical upper bound for lifetime exposure without appreciable risk. In the case of diallyl trisulfide, no specific ADI value has been confirmed from authoritative regulatory sources. This means that an illustrative calculation using a real numeric ADI cannot be performed. The absence of an established ADI does not imply a safety concern on its own; rather, it reflects that available evidence has not been translated into a numeric intake guideline by major regulatory bodies. Instead, flavoring agents like diallyl trisulfide are typically managed through expert panel evaluations and use-level guidance consistent with good manufacturing practices and sensory impact. The general approach to ADI calculations demonstrates how toxicological safety assessments inform practical exposure considerations. When a numeric ADI is available, it provides a clear method for estimating acceptable intake across different population groups and body weights. In the absence of such a value, as with diallyl trisulfide, regulatory frameworks focus on ensuring use levels are appropriate for the compound’s technical function and do not contribute to excessive exposure relative to typical dietary patterns. This illustrative perspective highlights the role of ADI in safety assessment while acknowledging that specific numeric values may not be defined for all flavoring substances. It underscores the importance of context in interpreting regulatory safety guidance and the role of expert evaluation in determining use conditions for food additives.

Safety And Health Research

Safety and health research on Diallyl Trisulfide encompasses both its sensory use in flavor applications and broader scientific investigations into its biochemical properties. Flavoring agents, by definition, are added to foods in relatively low concentrations and are evaluated for safety based on potential exposure levels and toxicological data. In the case of diallyl trisulfide, expert panel evaluations and listings by organizations such as the Flavor and Extract Manufacturers Association (FEMA) indicate that it has been subject to review in the context of flavor use. Such evaluations consider available toxicological evidence, exposure scenarios, and relevant scientific literature to determine whether the substance can be used safely within defined functional boundaries in food products. Beyond flavoring contexts, diallyl trisulfide has attracted research interest due to its presence in garlic and related plants and its interaction with biological systems in laboratory settings. Studies have explored its role as a hydrogen sulfide donor, its influence on cellular pathways, and its impact on microbial growth in controlled environments. These investigations contribute to a broader understanding of organosulfur compound activity but do not directly translate into regulatory safety claims for food use. Safety assessments for flavoring substances focus on potential toxicological endpoints relevant to dietary exposure, such as metabolism, genotoxicity, and systemic effects. When data are insufficient to establish quantitative metrics like acceptable daily intake, regulatory assessments adopt conservative assumptions to protect public health. It is important to distinguish between findings from laboratory research and established safety conclusions for food use. Laboratory studies may reveal mechanisms of action or biological effects under specific experimental conditions, but such data do not constitute regulatory safety determinations without appropriate exposure context and assessment by qualified authorities. For diallyl trisulfide, authoritative regulatory bodies have evaluated the substance within flavor inventories, but explicit numeric safety thresholds are not established in widely recognized regulatory documents. As a result, references to general safety considerations emphasize that use should comply with good manufacturing practices and allowable conditions defined by relevant expert panels rather than specific health effects claims. In summary, safety and health research on diallyl trisulfide includes both regulatory flavor evaluations and broader scientific studies. Regulatory assessments prioritize data relevant to dietary exposure, while laboratory research expands understanding of biochemical properties without directly dictating food additive safety standards.

Regulatory Status Worldwide

The regulatory status of Diallyl Trisulfide varies across jurisdictions and depends on its classification as a flavoring substance rather than a primary nutrient or preservative. In the United States context, flavoring substances are often evaluated through inventories that include Generally Recognized as Safe (GRAS) designations and evaluations by expert panels. The U.S. Food and Drug Administration maintains the Substances Added to Food inventory, which incorporates listings of flavoring substances evaluated by expert groups such as the Flavor and Extract Manufacturers Association (FEMA) and includes reference numbers for substances that have undergone such review. Inclusion in this inventory indicates that a substance has been considered for use in food flavoring, though it does not in itself constitute a direct regulatory approval under specific sections of the Code of Federal Regulations. As such, the FDA status for diallyl trisulfide as a flavoring agent is not defined by a specific CFR citation, and the agency’s approval field remains null in regulatory safety reporting because a direct regulation reference could not be confirmed from available inventory documentation. In international contexts, the Flavor and Extract Manufacturers Association assigns a unique number to diallyl trisulfide, indicating it has been evaluated as part of flavoring substances subject to expert panel review. The FEMA listing includes information on such evaluations and links to summaries of scientific literature review. Additionally, joint evaluations by global expert bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) assign identifiers that reflect their consideration of flavoring substances. For diallyl trisulfide, a JECFA number has been associated, indicating it has been part of a historical expert evaluation process for food additives, though specific quantitative safety metrics such as acceptable daily intake values are not confirmed in authoritative documentation. European regulatory frameworks may include diallyl trisulfide within broader categories of flavoring compounds authorized for use in feed or food, subject to conditions and labeling requirements. These frameworks often require transparency about functional categories and safety assessments by entities such as the European Food Safety Authority. However, explicit details on diallyl trisulfide’s status under specific European regulations such as E-numbers are not evident in the referenced regulatory materials. Overall, the regulatory landscape for diallyl trisulfide reflects its role as a flavoring ingredient evaluated by expert panels rather than as a substance with explicit quantitative limits codified in major food additive lists.

Taste And Functional Properties

Diallyl Trisulfide is recognized for its distinct sulfurous taste and aroma profile, which is reminiscent of garlic and related Allium plants. Sensory evaluations of sulfur-containing flavor compounds consistently describe these molecules as having strong, savory, and pungent notes that evoke the smell of garlic, onion, or cooked Allium ingredients. The intensity of diallyl trisulfide’s sensory profile means that it can influence the overall flavor perception of a product even at relatively low concentrations, making it useful for flavor formulation where sulfurous characteristics are sought. In terms of functional behavior, diallyl trisulfide is a hydrophobic compound that is not readily soluble in water but shows greater compatibility with organic solvents and lipid phases. This solubility profile affects how it disperses in different food matrices and how it may interact with other ingredients. In emulsions and flavor oils, diallyl trisulfide can integrate into the lipid phase and contribute to the aroma profile when the product is consumed. Its stability under various processing conditions, such as heating or pH changes, is a consideration for formulators, as sulfurous compounds can transform or degrade depending on thermal and chemical environments. From a sensory perspective, functional properties of diallyl trisulfide include its ability to provide depth and complexity to savory flavor profiles. It can contribute not only primary garlic-like notes but also nuances that interact with other volatile compounds in a formula, creating a more rounded sensory experience. Because flavor perception arises from a combination of taste and smell, the volatility of diallyl trisulfide and its release dynamics during eating are important factors when assessing its impact. Overall, diallyl trisulfide’s taste and functional properties make it a specialized ingredient in flavor science. Its distinctive sulfurous sensory attributes are useful when crafting savory profiles, and its physical and chemical behavior in food systems shapes how it is applied in product formulations. Careful consideration of concentration, food matrix, and processing conditions helps ensure that the desired sensory outcome is achieved.

Acceptable Daily Intake Explained

The concept of Acceptable Daily Intake (ADI) is central to understanding how regulatory bodies assess the safety of substances added to food. ADI represents an estimate of the amount of a substance in food or drinking water that can be ingested daily over a lifetime without appreciable health risk. Establishing an ADI involves rigorous review of toxicological data, including studies on metabolism, chronic exposure, reproductive effects, and other relevant endpoints. These assessments incorporate safety factors to account for uncertainties and interspecies differences, ensuring that the derived intake level provides a margin of safety for human populations. In the specific case of diallyl trisulfide, available authoritative sources do not provide a defined ADI value from major regulatory bodies such as the Joint FAO/WHO Expert Committee on Food Additives. While diallyl trisulfide has been associated with a JECFA evaluation number indicating it has been considered in the context of expert review, explicit numeric ADI values are not documented in the publicly accessible evaluation summaries. As a result, the numeric field for ADI in regulatory reporting is set to null, and notes indicate that no explicit value could be confirmed from d sources. Despite the absence of a specific ADI, the general principle remains that flavoring agents like diallyl trisulfide are used at levels consistent with their technical function and sensory potency. In practice, this means they are added in small quantities that achieve the desired flavor effect without contributing significant exposure relative to overall dietary intake. Regulatory frameworks often emphasize that flavoring substances should be used in accordance with good manufacturing practices, which implicitly reflect an understanding of exposure and safety considerations. Consumers and manufacturers alike benefit from the ADI concept as it provides a scientifically grounded reference for evaluating long-term exposure safety. Even when an explicit ADI is not established for a specific compound, the underlying philosophy of conservative safety margins and careful evaluation of toxicological evidence informs regulatory decisions and industry practices. In the case of diallyl trisulfide, its inclusion in flavor evaluations and expert panel listings reflects a broader safety assessment process, even though a quantified ADI is not specified.

Comparison With Similar Additives

When comparing diallyl trisulfide to similar flavoring additives, it is useful to consider other sulfur-containing compounds that contribute to savory or Allium-like sensory profiles. One such comparator is diallyl disulfide, another organosulfur compound found in garlic and related plants. Like diallyl trisulfide, diallyl disulfide provides sulfurous aroma and taste notes and is used in flavor formulation to enhance savory characteristics. The sensory impact of diallyl disulfide tends to be strong even at low concentrations, and its presence complements other flavoring components in savory applications. Both compounds share structural similarities, with diallyl disulfide containing two sulfur atoms linking allyl groups, compared to three in diallyl trisulfide. This structural difference influences volatility and sensory perception, contributing to nuanced differences in flavor intensity and profile. Another related flavoring ingredient is allyl methyl sulfide, which also exhibits sulfurous sensory characteristics. Allyl methyl sulfide is often associated with milder sulfur notes and may be used in formulations where a less intense savory impact is desired. Compared to diallyl trisulfide, allyl methyl sulfide’s sensory profile is perceived as subtler, which can be advantageous in certain product categories where a balanced sensory outcome is preferred. Both compounds are part of a broader class of sulfur-containing flavor molecules that contribute to the complexity of savory and Allium-inspired flavor profiles. A further comparison can be made with synthetic garlic flavor concentrates that combine multiple organosulfur compounds to achieve a comprehensive sensory experience. These concentrates may include diallyl sulfide, diallyl disulfide, diallyl trisulfide, and other related molecules, each contributing distinct aspects of the overall profile. The use of such blends allows formulators to tailor sensory outcomes with greater precision than any single component alone. In this context, diallyl trisulfide acts as one element within a spectrum of compounds that collectively deliver a characteristic flavor. Comparisons across these related additives highlight how structural differences and sensory properties influence their roles in flavor formulation. While diallyl trisulfide provides potent sulfurous notes aligned with garlic-like profiles, other compounds offer complementary sensory qualities that expand the palette available to flavor scientists. Understanding these relationships supports informed selection of additives based on the desired sensory impact, processing conditions, and product category.

Common Food Applications Narrative

Diallyl Trisulfide finds its way into a range of food-related applications where savory and sulfurous flavor notes are desired, even though it is not a mainstream bulk ingredient on its own. In many culinary contexts, the sensory characteristics associated with garlic and other Allium-derived flavors are integral to consumer expectations for certain products. As a defined flavoring agent, diallyl trisulfide supports these expectations when used in flavor blends designed for particular product categories. In savory snack seasonings, for example, flavor chemists may incorporate compounds that evoke the aroma of roasted garlic or cooked onion to create a more engaging taste profile. Such seasonings are commonly applied to chips, crackers, and other snack items that rely on bold flavor statements. Similarly, in sauces, dressings, and condiments that aim for a robust, savory character, sulfurous flavor compounds supplement natural extracts to provide consistency and intensity that consumers recognize. Beyond these categories, diallyl trisulfide is also relevant in prepared meals and convenience foods where a signature garlic-like aroma contributes to the overall appeal. Ready-to-eat dishes, frozen entrees, and shelf-stable meal components may include flavor concentrates in which diallyl trisulfide plays a part of the composite sensory profile. In each of these applications, the role of the compound is to reinforce or simulate sensory cues associated with traditional cooking ingredients, helping products deliver a satisfying eating experience. The use of diallyl trisulfide in food applications reflects broader trends in flavor design, where individual chemical components are selected to achieve targeted sensory outcomes. These outcomes are shaped by cultural preferences, product positioning, and consumer familiarity with specific taste and aroma profiles. As a result, diallyl trisulfide’s inclusion in flavor blends supports the creation of products that meet defined sensory expectations in competitive markets.

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Safety & Regulations

FDA

  • Notes: No specific FDA regulation section for diallyl trisulfide as a food additive could be confirmed from available authoritative listings.

EFSA

  • Notes: No specific EFSA E-number or ADI for diallyl trisulfide was confirmed from authoritative evaluations.

JECFA

  • Notes: A JECFA evaluation number is associated, but no explicit numeric ADI or year could be verified from the d source.
  • Ins Number: 587

Sources

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