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Flavouring 2-Methylpropyl 3-methylbutyrate
Synonym(s) Isobutyl isovalerate
Latest JECFA evaluation 1997 (Session 49)
Status of specification Full
Chemical name 2-Methylpropyl 3-methylbutanoate
JECFA number 203
CAS number 589-59-3  
FEMA number 3369
COE number 568
FLAVIS number -
Molecular weight 158.24 
Chemical formula C9H18O2  
Physical form/odour colourless to pale yellow liquid 
Solubility miscible with alcohol 
Solubility in ethanol -
Boiling point (°C) 170
Assay min % 98.0
Acid value max 1.0
Refractive index 1.404-1.408
Specific gravity 0.850-0.854
Other requirements -
ID Test IR
Spectrum http://www.fao.org/ag/agn/jecfa-flav/img/img/203.gif



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