Food safety and quality: details

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