What is Bis(2-methyl-3-furyl) Tetrasulfide?
Bis(2-methyl-3-furyl) tetrasulfide (CAS Number: 28588-76-1) is a synthetic organic compound classified as a flavoring agent. The molecule consists of two methylfuryl groups connected by a tetrasulfide (four-sulfur) linkage. This structure is responsible for its characteristic savory, meaty, and roasted flavor properties. It belongs to the broader category of sulfur-containing flavor compounds, which are commonly used to replicate the complex tastes found in naturally roasted, cooked, or fermented foods.
Common Uses
Bis(2-methyl-3-furyl) tetrasulfide is employed as a flavoring agent in processed food products where savory and meaty taste profiles are desired. It may be incorporated into soups, broths, gravies, snack foods, seasoning blends, and meat analogs. The compound is typically used in very small concentrations—often in the parts per million range—because of its potent flavor impact. Food manufacturers use this ingredient to enhance the perceived depth and authenticity of cooked or roasted flavors without requiring actual cooking processes or meat ingredients.
Safety Assessment
Bis(2-methyl-3-furyl) tetrasulfide has not received GRAS (Generally Recognized As Safe) status from the FDA, meaning it has not been formally evaluated and approved as safe for unrestricted use in food. However, the absence of GRAS status does not indicate the compound is unsafe; rather, it indicates that formal FDA approval through the GRAS petition process has not been sought or completed.
According to FDA records, there have been zero reported adverse events and zero product recalls associated with this flavoring agent. This lack of adverse event reports is notable, though it may reflect limited widespread use rather than comprehensive safety data. The compound's chemical structure suggests it is metabolized similarly to other sulfur-containing flavor compounds that have been used safely in food for decades.
Given its use in extremely small quantities and lack of reported safety incidents, the available evidence does not indicate significant safety concerns. However, comprehensive toxicological studies specific to this compound may be limited in the public domain. As with many synthetic flavoring agents, safety depends on appropriate use levels and dietary exposure.
Regulatory Status
In the United States, bis(2-methyl-3-furyl) tetrasulfide may be used under FDA regulations as a synthetic flavoring substance if it complies with applicable regulations for food additives, even without GRAS status. The FDA maintains regulations under 21 CFR Part 182 and related sections that govern the use of flavoring agents.
Regulatory status in other regions may vary. The European Food Safety Authority (EFSA) has its own approved list of flavorings used in the European Union. Manufacturers using this ingredient must comply with regulations in each country where products are sold.
Key Studies
Publicly available peer-reviewed toxicological studies specifically examining bis(2-methyl-3-furyl) tetrasulfide appear to be limited. Most safety information would likely reside in proprietary submissions to regulatory agencies. The lack of published adverse event data and zero FDA recalls suggest this ingredient has not raised red flags in regulatory review, though comprehensive published safety assessments may not be readily available in scientific literature.
As with most synthetic flavor compounds used at trace levels, safety assessment relies on chemical structure analysis, metabolism studies, and established safe-use levels based on industry standards and regulatory guidance.