2,3-Butanedione

• CAT Number: R059394
• CAS Number: 431-03-8
• Molecular Formula: CH3COCOCH3
• Molecular Weight: 86.09
• Purity: ≥95%
• Synonyms: 2,3-Butadione; 2,3-Diketobutane; 2,3-Dioxobutane; Biacetyl; Butanedione; Diacetyl; Dimethyl Diketone; Dimethylglyoxal; NSC 8750; DA
• Storage: -20°C
• IUPAC Name: butane-2,3-dione
• InChI: InChI=1S/C4H6O2/c1-3(5)4(2)6/h1-2H3
• InChIKey: QSJXEFYPDANLFS-UHFFFAOYSA-N
• SMILES: CC(=O)C(=O)C

2,3-Butanedione（Cat No.:R059394）, also known as diacetyl, is a yellow-green liquid with a strong buttery odor and the molecular formula C4H6O2. It features two adjacent ketone groups (a diketone), making it highly reactive in nucleophilic addition and condensation reactions. Naturally occurring in fermented products like butter, beer, and wine, it is widely used as a flavoring agent to impart a rich, creamy taste. In organic synthesis, 2,3-butanedione serves as a building block for heterocycles and ligands. However, prolonged inhalation of diacetyl vapors is associated with respiratory risks, necessitating controlled handling.