2,3-butanedione, also known as diacetyl, is a colorless liquid organic compound with a buttery flavor and aroma. It is commonly used in the food industry as a flavoring agent, particularly in popcorn and dairy products. Its chemical formula is C4H6O2, and it is classified as a diketone due to the presence of two carbonyl groups. In addition to its culinary uses, 2,3-butanedione is also found in some industrial applications, such as in the production of certain plastics and as a solvent. However, exposure to high levels of diacetyl has been linked to respiratory issues, leading to safety regulations in workplaces where it is used.