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Online Edition: "Specifications for Flavourings"

Flavouring Isovaleric acid
Synonym(s) 3-Methylbutyric acid
Latest JECFA evaluation 1998 (Session 51)
Status of specification Full
Chemical name Isovaleric acid
JECFA number 259
CAS number 503-74-2
FEMA number 3102
COE number 8
FLAVIS number
Molecular weight 102.13
Chemical formula C5H10O2
Physical form/odour colourless to pale yellow liquid with a disagreeable, rancid, cheese-like odour
Solubility soluble in alcohol, ether and water
Solubility in ethanol
Boiling point (°C) 175°
Assay min % 99.0%
Acid value max
Refractive index 1.401-1.405
Specific gravity 0.923-0.928
Other requirements
ID Test IR