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Online Edition: "Specifications for Flavourings"
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| Flavouring |
Diacetyl |
| Synonym(s) |
Dimethyldiketone
Dimethylglyoxal
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| Latest JECFA evaluation |
1998 (Session 51)
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| Status of specification |
Full |
| Chemical name |
2,3-Butanedione
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| JECFA number |
408 |
| CAS number |
431-03-8
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| FEMA number |
2370
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| COE number |
752
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| FLAVIS number |
-
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| Molecular weight |
86.09 |
| Chemical formula |
C4H6O2
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| 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 |
| Spectrum |
http://www.fao.org/ag/agn/jecfa-flav/img/img/408.gif
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