Methyl Propyl Trisulfide (CAS 17619-36-2, FEMA 3308) | Cooked Onion & Garlic Flavor Agent

Methyl Propyl Trisulfide, identified by the CAS registry number 17619-36-2 and designated with FEMA number 3308, is a potent organosulfur compound that serves as a critical flavor and fragrance ingredient, primarily recognized for its intense sulfurous and characteristic alliaceous aroma. This compound, also referenced by its systematic name or simply as methyl propyl trisulfide, is particularly valued for delivering the deep, cooked, and sometimes fermented notes associated with certain vegetables and savory foods.

In flavor creation, Methyl Propyl Trisulfide (CAS 17619-36-2) is essential for replicating complex, sulfur-rich profiles, especially those reminiscent of cooked onion, garlic, leek, and other allium species. Unlike some lighter sulfur compounds that convey fresh, raw notes, this ingredient—recognized under FEMA 3308—often contributes to the heavier, more persistent, and slightly boiled or stewed character. It is therefore widely employed in the formulation of savory applications such as soup and sauce bases (especially onion or garlic soups), gravies, processed meat flavors, savory snack seasonings, and ready-to-eat meal components. Its potency allows it to be used at very low levels to significantly impact the overall flavor profile, providing a robust sulfurous backbone.

Beyond its direct flavoring role, this trisulfide compound (a synonym for this specific molecule) acts as a key modifier and blender in complex savory systems. It is particularly effective in creating the flavor transition from raw to cooked allium notes. When used in combination with other sulfur compounds (like diallyl trisulfide or dimethyl trisulfide) and Maillard reaction products, Methyl Propyl Trisulfide (FEMA 3308) helps build authentic, layered flavors for applications like roasted garlic spreads, caramelized onion chutneys, or braised meat dishes. Its stability in certain processing conditions makes it suitable for products that undergo thermal treatment, though its volatile nature requires careful incorporation during manufacturing.

In addition to mainstream savory uses, this ingredient finds specialized application in flavors for fermented or aged products, such as certain cheeses or fermented sauces, where it can contribute to desired sulfurous nuances. In the fragrance industry, Methyl Propyl Trisulfide (CAS 17619-36-2) may be used in trace amounts to introduce powerful sulfuraceous, vegetable-like, or even truffle-like accents in certain niche or gourmand fragrance compositions.