2,3-Butanedione, also known as diacetyl, is a yellowish liquid with a strong buttery aroma. It is commonly used in the food and beverage industry as a flavoring agent, particularly for imparting a buttery taste to products such as popcorn, baked goods, and dairy-based items. However, it should be noted that excessive inhalation of 2,3-butanedione vapor has been associated with respiratory issues and may cause lung damage when exposed to high concentrations over long periods. Safety precautions should include proper ventilation and the use of personal protective equipment when handling this chemical. Concentration: 2000 ug/mL; Components: ; in methanol : water [9:1]