2,3-Butanedione, also known as diacetyl, is a yellow-green liquid with a strong buttery odor. It is a diketone compound that is naturally present in various foods and beverages, contributing to their flavor profile. Diacetyl is commonly found in dairy products, such as butter and cheese, and is also a byproduct of fermentation, making it prevalent in beer and wine. In the food industry, it is used as a flavoring agent to impart a buttery taste. However, its use has been scrutinized due to potential health risks associated with inhalation, particularly in occupational settings. Diacetyl is highly volatile, which contributes to its strong aroma and flavor impact.