Diacetyl
Synonyms: 2,3-butadione; 2,3-butanedione; dimethyl diketone; dimethylglyoxal; Butanedione; butadione; 2,3-diketobutane; 2,3-dioxobutane; butane-2,3-dione
Structure:
CAS RN: 431-03-8 Formula: C4H6O2
Melting point °C: 24.8 Boiling point °C: 87 - 88
MW: 86.0902 OAV: 3.40x103
Contribution to coffee: buttery aroma
During roasting: n/a
Other: Yellowish-green liquid with quinone odor vapors have chlorine-like odor when concentrated, very strong odor similar to butter on dilution. Present in fermenting perspiration - Produced by bacteria. Density is 0.981.