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Online Edition: "Specifications for Flavourings"

Flavouring Isobutyl 2-butenoate
Synonym(s) Isobutyl crotonate;2-Methylpropyl crotonate
Latest JECFA evaluation 2003 (Session 61)
Status of specification Full
Chemical name 2-Methylpropyl-2-butenoate
JECFA number 1206
CAS number 589-66-2
FEMA number 3432
COE number
FLAVIS number 09.273
Molecular weight 142.2
Chemical formula C8H14O2
Physical form/odour Colourless liquid; powerful fruity aroma
Solubility Slightly soluble in water; soluble in propylene glycol, most fixed oils
Solubility in ethanol soluble
Boiling point (°C) 171°
Assay min % 95% (of C8H16O2)
Acid value max 3
Refractive index 1.426-1.430
Specific gravity 0.880-0.900
Other requirements
ID Test IR