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Online Edition: "Specifications for Flavourings"

Flavouring Butyl isobutyrate
Latest JECFA evaluation 1997 (Session 49)
Status of specification Full
Chemical name Butyl-2-methyl propanoate
JECFA number 188
CAS number 97-87-0
FEMA number 2188
COE number 291
FLAVIS number
Molecular weight 144.21
Chemical formula C8H16O2
Physical form/odour colourless liquid/fresh fruity,apple-pineapple odour
Solubility miscible in alcohol, ether, most fixed oils; insoluble in glycerin, propylene glycol, water
Solubility in ethanol 1 ml in 7 ml 60% alcohol
Boiling point (°C) 166°
Assay min % 97.0%
Acid value max 1
Refractive index 1.401-1.404
Specific gravity 0.859-0.864
Other requirements
ID Test IR