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Online Edition: "Specifications for Flavourings"

Flavouring 5-Methyl-3-hexen-2-one
Synonym(s) Isobutylidene acetone
Latest JECFA evaluation 2002 (Session 59)
Status of specification Full
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