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Online Edition: "Specifications for Flavourings"

Flavouring Cyclotene propionate
Synonym(s) 2-Cyclopenten-1-one, 2-hydroxy-3-methyl-, propionate;2-Cyclopenten-1-one, 3-methyl-2-(1-oxopropoxy)-
Latest JECFA evaluation 2010 (Session 73)
Status of specification Full
Chemical name 2-methyl-5-oxocyclopent-1-en-1-yl propionate
JECFA number 2055
CAS number 87-55-8
FEMA number 4511
COE number
FLAVIS number
Molecular weight 168.19
Chemical formula C9H12O3
Physical form/odour Colourless to yellow liquid; Creamy carmellic buttery aroma
Solubility Practically insoluble or insoluble in water
Solubility in ethanol Soluble
Boiling point (°C) 167-169°
Assay min % 92%
Acid value max
Refractive index 1.479-1.484
Specific gravity 1.092-1.097 (20°)
Other requirements SC: 4-5% Cyclotene
ID Test MS
Spectrum