Food safety and quality: details

Flavouring	3,5-Undecadien-2-one
Synonym(s)	3,5-undeca-3,5-dien-2-one
Latest JECFA evaluation	2016 (Session 82)
Status of specification	Full
Information required
Chemical name	(3E,5E)-undeca-3,5-dien-2-one
JECFA number	2219
CAS number	68973-20-6
FEMA number	4746
COE number
FLAVIS number
Molecular weight	166.14
Chemical formula	C11H18O
Physical form/odour	Clear, colourless to slightly yellow liquid / Cucumber, green, tallow, fatty, fruity
Solubility	sparingly soluble
Solubility in ethanol	Soluble
Boiling point (°C)	253-254°
Assay min %	>95% (mixture of isomers)
Acid value max
Refractive index	1.518-1.522
Specific gravity	0.794- 0.914
Other requirements	Isomeric composition: 89-94% 3E,5E; 6-11% sum of 3E,5Z; 3Z,5Z; and 3Z,5E
ID Test	HNMR
Spectrum