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Online Edition: "Specifications for Flavourings"
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| Flavouring |
Pyruvaldehyde |
| Synonym(s) |
Acetylformaldehyde
2-Ketopropionaldehyde
Methylglyoxal
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| Latest JECFA evaluation |
2003 (Session 61)
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| Status of specification |
Full |
| Chemical name |
2-Oxopropanal
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| JECFA number |
937 |
| CAS number |
78-98-8
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| FEMA number |
2969
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| COE number |
105
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| FLAVIS number |
07.001
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| Molecular weight |
72.06 |
| Chemical formula |
C3H4O2
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| Physical form/odour |
yellow mobile hygroscopic liquid which polymerizes readily; pungent stinging odour |
| Solubility |
miscible with water and most solvents and oils (yellow solutions) |
| Solubility in ethanol |
miscible |
| Boiling point (°C) |
72 |
| Assay min % |
95 |
| Acid value max |
10 |
| Refractive index |
1.399-1.406 |
| Specific gravity |
1.041-1.048 |
| Other requirements |
[Polymer dissolves in water with evolution of heat, reverting to monomer; only available as 40% aqueous solution] |
| ID Test |
CNMR |
| Spectrum |
http://www.fao.org/ag/agn/jecfa-flav/img/img/937-cnmr.gif
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