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Online Edition: "Specifications for Flavourings"

Flavouring 1-Methyl-1-cyclopenten-3-one
Synonym(s) 3-Methyl-2-cyclopenten-1-one
Latest JECFA evaluation 2002 (Session 59)
Status of specification Full
Chemical name 3-Methylcyclopent-2-en-1-one
JECFA number 1105
CAS number 2758-18-1
FEMA number 3435
COE number 11137
FLAVIS number
Molecular weight 96.12
Chemical formula C6H8O
Physical form/odour Pale straw-coloured liquid; warm-spicy, sweet-floral and diffusive yet quite tenaceous odour
Solubility soluble in water; soluble in oil
Solubility in ethanol Miscible at room temperature
Boiling point (°C) 74° (15 mm Hg)
Assay min % 98%
Acid value max
Refractive index 1.485-1.491
Specific gravity 0.968-0.975
Other requirements