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Online Edition: "Specifications for Flavourings"

Flavouring Isobutyl butyrate
Latest JECFA evaluation 1997 (Session 49)
Status of specification Full
Chemical name 2-Methylpropyl butanoate
JECFA number 158
CAS number 539-90-2
FEMA number 2187
COE number 269
FLAVIS number
Molecular weight 144.21
Chemical formula C8H16O2
Physical form/odour colourless liquid with a sweet, fruity, apple-like, pineapple-like odour
Solubility soluble in most fixed oils; slightly soluble in water; insoluble in glycerol
Solubility in ethanol 1 ml in 8 ml 60% alcohol
Boiling point (°C) 157-158°
Assay min % 98.0%
Acid value max 1
Refractive index 1.402-1.405
Specific gravity 0.858-0.863
Other requirements
ID Test IR