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Online Edition: "Specifications for Flavourings"
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Analytical Methods (Volume 4)
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Flavouring
3-Methyl-2-oxobutanoic acid
Synonym(s)
Butanoic acid, 3-methyl-2-oxo-;2-Oxoisovaleric acid;Dimethylpyruvic acid
Latest JECFA evaluation
2007 (Session 68)
Status of specification
Full
Information required
Chemical name
3-Methyl-2-oxobutyric acid
JECFA number
631
CAS number
759-05-7
FEMA number
3869
COE number
FLAVIS number
Molecular weight
116.1
Chemical formula
C5H8O3
Physical form/odour
Pale yellow liquid; fruity aroma
Solubility
Soluble in water
Solubility in ethanol
Soluble
Boiling point (°C)
251°
Assay min %
97%
Acid value max
Refractive index
1.436-1.446
Specific gravity
1.115-1.120
Other requirements
m.p. = 17°
ID Test
CNMR HNMR MS
Spectrum