Online Edition: "Specifications for Flavourings"

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Flavouring Isobutyl acetoacetate
Synonym(s) Isobutyl 3-oxobutanoate
Isobutyl beta-ketobutyrate
Latest JECFA evaluation 2000 (Session 55)
Status of specification Full
Chemical name 2-Methylpropyl 3-oxobutyrate
JECFA number 597
CAS number 7779-75-1  
FEMA number 2177
COE number 242
FLAVIS number -
Molecular weight 158.2 
Chemical formula C8H14O3  
Physical form/odour colourless liquid; fruity taste; sweet, fruity odour of brandy 
Solubility insoluble in water; soluble in alcohol and oil 
Solubility in ethanol -
Boiling point (°C) 196°; 84.5° (11 mm Hg)
Assay min % 98%
Acid value max -
Refractive index 1.422-1.432
Specific gravity 0.970
Other requirements -
ID Test IR