ALLYL PROPYL DISULFIDE

CAS: 2179-59-1 FLAVORING AGENT OR ADJUVANT

ALLYL PROPYL DISULFIDE is an organosulfur compound used as a flavoring agent with a strong onion-like aroma, recognized in international food additive evaluations.

What It Is

ALLYL PROPYL DISULFIDE is an organosulfur compound identified by the CAS number 2179-59-1 and commonly used as a flavoring agent or adjuvant. It belongs to a class of chemical substances characterized by the presence of sulfur-sulfur bonds linking organic groups. The compound has been evaluated by expert bodies for its use in foods as a flavoring substance and is known for its contribution to savory and onion-like sensory properties in food products. It may appear under a range of synonyms and systematic names, reflecting variations in naming conventions across chemical and flavor industry references. It is often referred to by systematic and descriptive names that capture its structural elements, such as 2-propen-1-yl propyl disulfide or propyl allyl disulfide. These other names reflect its chemical structure, which consists of an aliphatic chain with a disulfide linkage. In the context of food additives, this compound is grouped with other low-molecular-weight organosulfur flavoring compounds. Allyl propyl disulfide is recognized in authoritative flavoring substance evaluations for its sensory attributes and chemical identity, and it is catalogued in flavor additive databases and regulatory lists. Its recognition in such contexts underscores its role as a bona fide flavoring agent in food science and industry.

How It Is Made

The production of ALYL PROPYL DISULFIDE for flavoring use is oriented around organic synthesis methods that unite simpler sulfur-containing precursors. In principle, organosulfur synthesis involves controlled reactions between allyl and propyl sulfur intermediates that form a disulfide bond under conditions that optimize yield and minimize byproducts. These processes are generally developed in chemical manufacturing environments where impurity profiles and reaction conditions are tightly controlled. For flavoring applications, the resulting product must meet purity and identity specifications that ensure consistency in sensory quality and safety. These specifications may be documented in flavoring compendia that outline assay requirements, physical properties, and acceptable levels of common impurities. The manufacturing environment for such compounds typically adheres to good manufacturing practices with quality control measures that encompass analytical verification of identity and composition. The compound can also be present naturally in certain Allium species such as onions and garlic, where it forms as part of the complex mixture of volatile organosulfur compounds released when plant tissues are disrupted. However, for use in standardized flavor formulations, the synthetic route provides a more consistent and scalable source than natural extraction.

Why It Is Used In Food

ALLYL PROPYL DISULFIDE is used in food primarily for its flavoring properties, imparting savory and onionlike aromatic notes that enhance the sensory profile of various savory foods. In flavor science, such organosulfur compounds are valuable because they can provide characteristic notes at low concentrations that mimic or augment natural flavors. The use of specific sulfur-containing flavoring agents like allyl propyl disulfide enables food formulators to achieve desired taste profiles in products where the natural flavors of ingredients might be diminished through processing or heat treatment. These compounds are often used in conjunction with other flavor components to create balanced and complex flavor profiles in savory snacks, seasonings, sauces, and prepared meals. From a technological perspective, flavoring agents such as this may also assist in masking off-notes that can develop during processing or storage. Because organosulfur compounds provide intense sensory cues recognizable to consumers, they are integrated into flavor systems that aim to deliver familiar aromatic experiences associated with foods like onions, garlic, and related savory products.

Adi Example Calculation

To illustrate how safety assessors think about exposure in relation to safety conclusions, consider a hypothetical individual with a body weight of 70 kilograms. If a flavoring agent had a numeric ADI established at a specific milligram-per-kilogram-body-weight level, one could multiply that ADI by the body weight to estimate a daily intake amount that would generally be considered within safe limits. For example, if an ADI were set at X mg per kilogram body weight per day, a 70 kg adult’s intake considered within that ADI would be 70 times X milligrams per day. This type of calculation helps contextualize what exposure levels mean in practical terms. In the case of allyl propyl disulfide, where regulatory evaluation concluded no safety concern at current intake levels rather than establishing a numeric ADI, the focus remains on typical dietary exposure being below levels of concern identified in toxicological assessments. The hypothetical calculation framework helps illustrate how regulators relate exposure to safety benchmarks.

Safety And Health Research

Regulators evaluating food flavoring agents such as ALLYL PROPYL DISULFIDE focus on safety endpoints that include potential toxicological effects, metabolism, and exposure levels associated with typical use in foods. In general, flavoring substances are assessed for potential genotoxicity, subchronic toxicity, and other hazard endpoints to determine whether intake at levels expected from food consumption presents any cause for concern. The Joint FAO/WHO Expert Committee on Food Additives concluded that, based on available data at the time of evaluation, allyl propyl disulfide does not raise safety concerns at current levels of intake when used as a flavoring agent. Toxicological data for many organosulfur flavoring substances consider animal studies examining absorption and metabolic pathways, as well as dose-response relationships in standard toxicity assays. Such studies support regulatory evaluations by demonstrating whether effects observed in experimental settings are of relevance at the low levels typical of flavoring use in foods. While comprehensive chronic toxicity data for every flavoring agent are not always available, safety evaluations rely on available experimental evidence and established scientific procedures for hazard characterization. Exposure assessment in safety evaluations considers typical use levels and consumption patterns across different food categories. This approach allows risk assessors to contextualize hazard information with realistic exposure scenarios. As with many flavoring compounds, the nature of dietary exposure is such that systemic levels remain low relative to doses used in toxicological testing, which contributes to conclusions that current use patterns do not pose safety concerns. It is important to note that safety assessments evolve as new data become available; regulatory bodies periodically review existing evaluations to incorporate new scientific evidence. The evaluation of allyl propyl disulfide by international expert committees remains a reference point for its safety assessment in food use.

Regulatory Status Worldwide

Authoritative bodies have evaluated ALYL PROPYL DISULFIDE in the context of flavoring substance use. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated this compound as part of its flavoring agent assessments, noting that there is no safety concern at current levels of intake when used as a flavoring agent; this evaluation was recorded in 2007 and appears in published JECFA monographs. The JECFA evaluation assigns it a unique identifier within the flavoring database and confirms its functional class as a flavoring agent rather than a nutrient or additive of technical effect outside of flavor. In the United States, references in the FDA Substances Added to Food (formerly EAFUS) database identify this compound among substances recognized for use as flavoring agents, consistent with its role in food formulation under conditions of good manufacturing practice. This inclusion reflects recognition by regulatory authorities that the compound can be used in food products within the scope of flavoring usage. European risk assessment bodies such as the European Food Safety Authority (EFSA) have engaged in broader evaluations of families of sulfur-containing flavoring substances, considering available data and JECFA conclusions as part of their scientific opinion frameworks. These evaluations contribute to the understanding of structural classes of flavoring agents and support harmonized assessment approaches within the EU, even if specific numeric authorization identifiers such as E-numbers are not always assigned to every individual substance. Overall, the regulatory status of allyl propyl disulfide in major food markets reflects its accepted use as a flavoring agent, subject to general provisions requiring that flavoring substances be used in ways consistent with safety and labeling requirements.

Taste And Functional Properties

ALLYL PROPYL DISULFIDE contributes strong savory and onionlike sensory cues that are perceived at low concentrations in complex flavor mixtures. Organosulfur compounds of this type have a characteristic sulfurous, sometimes garliclike or onionlike, aroma that can enhance the overall flavor dimension of a food product. The sensory contribution is often described as sharp, characteristic of Allium species, and useful in savory flavor applications. From a functional standpoint, this compound is volatile and interacts with olfactory receptors to deliver aroma impressions that are integral to the perception of flavor. Its solubility behavior—typically more soluble in organic phases than in water—means that it integrates well with lipid-rich matrices and flavor oil systems used in food formulations. Its stability is influenced by processing conditions, with heat and oxygen potentially altering organosulfur profiles; formulators take this into account when incorporating such agents into heat-processed foods. In sensory evaluation, mixtures that include allyl propyl disulfide are noted for their ability to evoke familiar savory notes at very low concentrations. The compound’s sensory role is often leveraged alongside other sulfur-containing flavor active compounds and amino-acid-derived flavor precursors to build full and balanced flavor profiles in foods that aim to replicate the sensory complexity of traditional ingredients like onions and garlic.

Acceptable Daily Intake Explained

An Acceptable Daily Intake (ADI) is a concept used by food safety authorities to describe the amount of a substance that can be ingested daily over a lifetime without appreciable health risk, based on toxicological data and safety factors. For flavoring agents such as ALYL PROPYL DISULFIDE, expert bodies may conclude that there is no safety concern at current intake levels rather than specify a numeric ADI. In such cases, the conclusion reflects that typical dietary exposure from food use is sufficiently low relative to hazard thresholds identified in toxicological studies. In safety assessments, panels consider the available toxicological and exposure data to determine whether an additive’s use at its intended levels is compatible with consumer safety. When regulators state that no safety concern exists, it implies that estimated intakes from all food sources are below any level at which adverse effects have been identified in studies. It does not mean that unlimited consumption is safe, but rather that within the context of intended use in foods, exposures are expected to lie within a range considered safe by scientific evaluation. The ADI concept is therefore a tool for risk managers and food producers to understand the margin of safety associated with food additive use. For consumers, it serves as reassurance that flavoring agents evaluated through established scientific procedures have been reviewed in light of realistic consumption patterns and toxicological evidence.

Comparison With Similar Additives

ALLYL PROPYL DISULFIDE shares functional similarities with other sulfur-containing flavoring compounds used in savory food applications. Compounds such as diallyl disulfide and diallyl trisulfide are also organosulfur constituents known for their strong aromatic profiles reminiscent of garlic and related Allium species. Like allyl propyl disulfide, these compounds contribute distinctive sensory cues and are considered within flavor formulation strategies to achieve desired savory notes. Comparatively, the sensory intensity and volatility of these sulfur-containing flavoring agents vary depending on molecular structure. Some, like diallyl disulfide, may exhibit a slightly different odor profile or persistence due to differences in sulfur chain length or functional groups, which can influence how they are applied in specific flavor systems. Formulators choose among these compounds based on the target flavor profile, processing conditions, and compatibility with other components in the formulation. From a regulatory perspective, many structurally related sulfur flavoring agents have been evaluated by expert committees, and their safety assessments consider both the chemical similarities and distinct properties of each compound. Although they may be grouped together in broader flavoring evaluations, individual assessments ensure that each compound’s use is consistent with safety considerations and intended sensory roles. This comparative context highlights how allyl propyl disulfide fits within a family of related flavoring agents that contribute to savory and aromatic dimensions in food products.

Common Food Applications Narrative

Flavoring agents like ALLYL PROPYL DISULFIDE are commonly used in a wide range of savory food products where enhanced onion, garlic, or savory profiles are desirable. In processed soups and stocks, this compound can help reconstruct the bright and characteristic allium notes that consumers associate with freshly prepared dishes, compensating for losses during cooking or canning. Soups often rely on a suite of flavoring agents to build depth, and sulfur-containing compounds contribute a familiar aromatic backbone. Seasoning blends—whether for meats, vegetarian dishes, or snack seasonings—frequently incorporate flavor agents that mimic or enhance the flavors of onions or garlic. In these applications, allyl propyl disulfide acts as one piece of a broader flavor puzzle, working in harmony with herbs, spices, and other aromatic compounds to deliver a balanced savory experience. Its presence in seasoning blends helps to round out the sensory profile and provide recognizable cues that consumers associate with richly flavored savory foods. Prepared meals and sauces also benefit from the inclusion of flavoring agents that deliver consistent sensory experiences across batches and production runs. For example, sauces that aim to emulate traditional onion-based recipes can use this compound as part of a carefully calibrated flavor formula. In each case, the goal is to deliver a sensory experience that resonates with expectations for onionlike flavor without reliance on fresh ingredients, which can vary in quality or be cost-prohibitive for certain applications. Overall, the inclusion of this flavoring agent in food production is guided by sensory goals and formulation needs, ensuring that the final product delivers pleasing and familiar savory notes in a repeatable manner.

Safety & Regulations

FDA

  • Notes: Inclusion in FDA substances added to food lists suggests recognition as a flavoring agent but specific CFR authorization details were not found in authoritative sources.

EFSA

  • Notes: EFSA general flavoring evaluations exist but specific numeric authorization or E-number for this compound was not located in authoritative sources.

JECFA

  • Year: 2007
  • Ins Number: 1700
  • Adi Display: No safety concern at current levels of intake when used as a flavouring agent

Sources

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