Food safety and quality: details

Flavouring	4-(2-Butenylidene)-3,5,5-trimethylcyclohex-2-en-1-one (mixture of isomers)
Synonym(s)	Megastigmatrienone;2-Cyclohexen-1-one, 4-(2-butenylidene)-3,5,5-trimethyl-
Latest JECFA evaluation	2010 (Session 73)
Status of specification	Full
Information required
Chemical name	Mixture of (E)-4-((E)-but-2-en-1-ylidene)-3,5,5-trimethylcyclohex-2-enone and (E)-4-((Z)-but-2-en-1-ylidene)-3,5,5-trimethylcyclohex-2-enone
JECFA number	2057
CAS number	13215-88-8
FEMA number	4663
COE number
FLAVIS number
Molecular weight	190.28
Chemical formula	C13H18O
Physical form/odour	Clear to pale yellowish liquid; Fruity floral tobacco-like aroma
Solubility	Practically insoluble or insoluble in water
Solubility in ethanol	Soluble
Boiling point (°C)	95-110° (< 1 mm Hg)
Assay min %	95%
Acid value max
Refractive index	1.536-1.556
Specific gravity	0.985-1.005
Other requirements	Mixture of isomers: (50% E,E; 50% E,Z); SC: 5-6% 4,7,9-Megastigmatrien-3-one
ID Test	HNMR IR MS
Spectrum