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Online Edition: "Specifications for Flavourings"

Flavouring L-Isoleucine
Synonym(s) (2S,3S)-alpha-amino-beta-merthyl n-valeric acid
Latest JECFA evaluation 2012 (Session 76)
Status of specification Full
Chemical name (2S,3S)-2-Amino-3-methylpentanoic acid
JECFA number 2118
CAS number 73-32-5
FEMA number 4675
COE number
FLAVIS number
Molecular weight 131.17
Chemical formula C6H13NO2
Physical form/odour White to off-white powder; Sweet aroma
Solubility Soluble in 0.26 mM phosphate buffer pH 7.1; soluble in propylene glycol
Solubility in ethanol Soluble
Boiling point (°C) NA
Assay min % 99%
Acid value max
Refractive index NA
Specific gravity NA
Other requirements m.p. >260° (decomposition)
ID Test IR