Food safety and quality: details

Flavouring	5-Methyl-3-hexen-2-one
Synonym(s)	Isobutylidene acetone
Latest JECFA evaluation	2002 (Session 59)
Status of specification	Full
Information required
Chemical name	5-Methylhex-3-en-2-one
JECFA number	1132
CAS number	5166-53-0
FEMA number	3409
COE number	11149
FLAVIS number
Molecular weight	112.17
Chemical formula	C7H12O
Physical form/odour	clear colourless liquid; pungent metalic odour
Solubility	insoluble in water
Solubility in ethanol	Miscible at room temperature
Boiling point (°C)	77.5° (50 mm Hg)
Assay min %	99%
Acid value max
Refractive index	1.437-1.441
Specific gravity	0.838-0.843
Other requirements
ID Test	NMR
Spectrum