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Online Edition: "Specifications for Flavourings"

Flavouring Methyl-alpha-ionone
Synonym(s) alpha-Cyclocitrylidene methyl ethyl ketone;Raldeine;alpha-Cetone;alpha-Cyclocitrylidene butanone;alpha-n-Methylionone
Latest JECFA evaluation 2000 (Session 55)
Status of specification Full
Chemical name 5-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-4-penten-3-one
JECFA number 398
CAS number 127-42-4
FEMA number 2711
COE number 143
FLAVIS number
Molecular weight 206.33
Chemical formula C14H22O
Physical form/odour yellowish, oily liquid
Solubility in ethanol
Boiling point (°C) 238°
Assay min % 90% (minimum 95% sum of methyl ionone isomers)
Acid value max
Refractive index 1.498-1.503
Specific gravity 0.921-0.930
Other requirements
ID Test IR