BENZYL DISULFIDE

CAS: 150-60-7 FLAVORING AGENT OR ADJUVANT

BENZYL DISULFIDE (CAS 150-60-7) is an organosulfur flavouring agent used as a synthetic flavouring substance or adjuvant under conditions of good manufacturing practice.

What It Is

BENZYL DISULFIDE is an organosulfur compound referenced under CAS number 150-60-7 that functions as a flavouring agent or adjuvant in food. It is listed among synthetic flavouring substances permitted for use in foods in the United States under regulatory section 21 CFR 172.515, where it is recognised for its contribution to flavour profiles when used in accordance with good manufacturing practice. Structurally, the molecule consists of two benzyl groups joined by a disulfide linkage, which is characteristic of aromatic disulfides and contributes to its sensory attributes. The compound is also known by multiple synonyms, including dibenzyl disulfide, BDS, and di(phenylmethyl) disulfide, reflecting its chemical classification and industrial nomenclature. Its inclusion in regulatory inventories identifies it principally for use as a flavouring substance, where it modifies or enhances sensory properties of foodstuffs. The technical description emphasises its role in flavour systems rather than nutritional or functional food chemistry roles.

How It Is Made

The manufacture of BENZYL DISULFIDE typically involves the controlled synthesis of organic sulfur compounds where benzyl-based precursors are oxidised or coupled to form the disulfide linkage. For example, benzyl thiol derivatives can be oxidised under specific conditions to generate the benzyl disulfide structure. Alternative synthetic routes may involve coupling benzyl halides with sulfur-containing reagents under controlled laboratory conditions. Such processes are designed to yield a product with high purity suitable for flavouring applications. Industrial producers of flavouring ingredients generally adhere to pharmaceutical- or food-grade synthesis standards, ensuring that residual reactants and by-products are minimised. After synthesis, products are purified through techniques such as recrystallisation or distillation to achieve organoleptic and regulatory standards for food use. Because BENZYL DISULFIDE is used at low levels in food formulations, manufacturing processes focus on consistency and compliance with flavour specifications rather than bulk chemical production for non-food uses.

Why It Is Used In Food

BENZYL DISULFIDE is used in food primarily for its ability to impart or enhance flavour characteristics, particularly those described as smoky, earthy, or roasted in sensory profiles. In flavour chemistry, disulfides contribute complex sulfur-derived notes that are often desirable in savoury applications, baked goods, meat analogues, and other formulations where depth of flavour is sought. The molecule’s volatility and interaction with other aromatic compounds allow it to influence overall aroma perception even at low concentrations. Flavourists and food technologists select such flavouring agents to improve the palatability and consumer appeal of products, tailoring formulations to reach targeted sensory outcomes. Its designation as a flavouring agent or adjuvant reflects this technological function in blending, supporting other flavour compounds, and helping achieve a balanced sensory impact in final products.

Adi Example Calculation

The following illustrative calculation shows how Acceptable Daily Intake (ADI) concepts are used in risk assessment, not as a recommendation for individuals. Suppose a theoretical ADI for a flavouring agent were set at 1 mg/kg bw/day; a person weighing 70 kg would have a theoretical daily intake threshold of 70 mg. By contrast, actual dietary exposures to flavouring agents like BENZYL DISULFIDE are typically orders of magnitude lower, on the scale of micrograms, due to their potency and low use levels in foods. This contrast between hypothetical thresholds and actual exposures illustrates why regulatory bodies conclude that there is no safety concern at current intake levels for many such flavouring substances.

Safety And Health Research

Safety evaluations for flavouring agents like BENZYL DISULFIDE focus on potential toxicological endpoints relevant to human exposure through food, including acute toxicity, subchronic effects, and metabolic fate. Regulatory bodies such as JECFA review available data on the compound’s chemistry, metabolism, and intake estimates to determine if there are safety concerns at anticipated dietary exposures. In the case of BENZYL DISULFIDE, JECFA’s evaluation record indicates that it did not identify a safety concern at current intake levels when used in compliance with good manufacturing practice. This conclusion is typically based on an assessment of experimental toxicology studies, structure-activity considerations, and comparison with related compounds, recognising that organosulfur compounds can vary widely in their biological activity. While some aromatic thiols and disulfides can exhibit biological effects at higher doses, the regulated use levels in food are designed to be far below thresholds of toxicological relevance. As with other flavouring agents, continued evaluation of emerging data may be part of ongoing regulatory practice, but the existing assessments support the established use conditions.

Regulatory Status Worldwide

In the United States, BENZYL DISULFIDE is recognised under 21 CFR 172.515 as a synthetic flavouring substance and adjuvant permitted for use in food when applied in accordance with good manufacturing practice, which includes using the minimum quantity necessary to achieve the desired flavour effect and complying with food additive requirements. This regulatory citation indicates that the U.S. Food and Drug Administration has evaluated its use and determined that, under stipulated conditions, food products containing it are consistent with safety standards set forth in the Code of Federal Regulations. Internationally, BENZYL DISULFIDE has been evaluated by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) and assigned a flavouring group evaluation number, where the committee concluded that at current levels of intake as a flavouring agent, there is no safety concern. This reflects an international consensus that controlled use in food flavour applications is permissible under evaluative frameworks where intake estimates are low and supported by available toxicological data.

Taste And Functional Properties

BENZYL DISULFIDE contributes specific sensory notes that are often characterised as part of a smoky, roasted, or earthy aroma profile. Such disulfide compounds interact with human olfactory receptors differently than simple esters or aldehydes, adding complexity to flavour formulations. Organosulfur compounds can be potent, meaning that even small concentrations influence perception significantly, which is consistent with their inclusion under regulatory guidance for use at minimal effective levels. Functionally, the solubility profile of BENZYL DISULFIDE is typical of aromatic organosulfur compounds, with limited water solubility but greater affinity for organic phases, which influences how it is incorporated into food systems and flavour carriers. These characteristics are considered by food formulators when pairing BENZYL DISULFIDE with emulsifiers or solvents to ensure homogeneous distribution in complex matrices.

Acceptable Daily Intake Explained

Acceptable Daily Intake (ADI) is a risk assessment concept used by regulatory and expert bodies to describe the estimated amount of a substance that can be consumed daily over a lifetime without appreciable health risk. It is generally expressed in milligrams of the substance per kilogram of body weight per day (mg/kg bw/day). For many flavouring agents, including BENZYL DISULFIDE, expert committees such as JECFA may determine that the anticipated intake from food is low enough that a formal numerical ADI is not required or that ‘no safety concern at current intake levels’ is the conclusion. This approach recognises that many flavouring agents are consumed in very small amounts and metabolic handling in the body supports their use at these levels. The ADI concept provides a context for understanding regulatory evaluations and safety margins inherent in approving flavouring agents, emphasising conservative assessment where exposures are compared against data from toxicological studies and structural activity analyses.

Comparison With Similar Additives

Many sulphur-containing flavouring agents, such as diallyl disulfide and other aromatic disulfides, share functional roles in imparting complex sensory notes, especially in savoury and roasted profiles. Compared to simple sulphur compounds like allyl sulfides derived from garlic or onion, BENZYL DISULFIDE tends to contribute a different aromatic character due to its aromatic ring systems and disulfide linkage, offering deeper smoky or roasted nuances. These differences influence how flavourists select agents to achieve specific sensory goals in product formulations. Other organosulfur flavour compounds may vary in volatility, solubility, and sensory impact, leading to diverse applications despite shared chemical classes. Regulatory assessments also differ among these agents based on structural activity, exposure estimates, and toxicological data, highlighting the importance of compound-specific evaluation within broader classes of flavouring substances.

Common Food Applications Narrative

In practical food applications, BENZYL DISULFIDE is incorporated into flavour blends designed to enhance or create specific sensory experiences. For example, in savoury snack formulations, disulfide-based flavouring agents can contribute to roasted, grilled, or meat-like notes, complementing other aroma components. In baked goods, such compounds may support the perception of depth and complexity that consumers associate with artisanal or slow-cooked products. Beverage flavour systems that aim for darker, roasted profiles may also incorporate such agents in trace amounts to achieve a desired aromatic finish. Because its use is regulated and typically limited to the minimum functional level needed to achieve a sensory effect, BENZYL DISULFIDE is often part of carefully architected flavour packages rather than a stand-alone ingredient. These applications reflect industry practice in deploying flavouring agents where they support product identity without overpowering inherent food flavours.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.515

EFSA

  • Notes: EFSA-specific regulatory status not verified from available authoritative sources

JECFA

  • Year: 1999
  • Adi Display: No safety concern at current intake levels

Sources

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