Food safety and quality
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Flavouring |
Diacetyl |
Synonym(s) |
Dimethylglyoxal;Dimethyldiketone |
Latest JECFA evaluation |
1998 (Session 51) |
Status of specification |
Full |
Information required |
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Chemical name |
2,3-Butanedione |
JECFA number |
408 |
CAS number |
431-03-8 |
FEMA number |
2370 |
COE number |
752 |
FLAVIS number |
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Molecular weight |
86.09 |
Chemical formula |
C4H6O2 |
Physical form/odour |
yellow to yellow-green liquid with a powerful, buttery odour in very dilute solution |
Solubility |
soluble in glycerol and water; miscible with alcohol, propylene glycol, and most fixed oils |
Solubility in ethanol |
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Boiling point (°C) |
87-88° |
Assay min % |
95.0% |
Acid value max |
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Refractive index |
1.393-1.397 |
Specific gravity |
0.975-0.990 |
Other requirements |
Solidification point: -2.0 to -4.0 |
ID Test |
IR |
Spectrum |
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