Diethyl disulfide is an organosulfur compound with the chemical formula C4H10S2. It is a colorless to pale yellow liquid with a strong, pungent odor reminiscent of garlic. This compound is a significant component of the volatile oils of garlic and onions, contributing to their characteristic aroma and flavor. Diethyl disulfide is used in the food industry as a flavoring agent to impart a savory, onion-like taste. It is also found in other Allium species and is formed during the breakdown of sulfur-containing amino acids. In terms of its chemical properties, diethyl disulfide is relatively stable but can undergo oxidation to form other sulfur compounds. Its volatility makes it an important compound in the aroma profile of foods.