CH3COCOCH3
CH3COCOCH3 is the chemical diacetyl, also known as butane-2,3-dione. Its molecular formula is C4H6O2. It is a symmetric diketone in which two acetyl groups are joined by a single bond between their carbonyl carbons (structure: CH3–CO–CO–CH3). It is a colorless to pale yellow liquid with a characteristic buttery odor.
Diacetyl occurs naturally in dairy products and is produced by certain lactic acid bacteria during fermentation.
Uses of diacetyl are primarily culinary. It provides butter-like flavors in products such as popcorn, baked
Safety and regulatory aspects: Inhalation exposure to diacetyl has been linked to serious respiratory effects, including