Food safety and quality
| share

Online Edition: "Specifications for Flavourings"

Flavouring Diacetyl
Synonym(s) Dimethylglyoxal;Dimethyldiketone
Latest JECFA evaluation 1998 (Session 51)
Status of specification Full
Chemical name 2,3-Butanedione
JECFA number 408
CAS number 431-03-8
FEMA number 2370
COE number 752
FLAVIS number
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
Boiling point (°C) 87-88°
Assay min % 95.0%
Acid value max
Refractive index 1.393-1.397
Specific gravity 0.975-0.990
Other requirements Solidification point: -2.0 to -4.0
ID Test IR