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Online Edition: "Specifications for Flavourings"

Flavouring Isoamyl pyruvate
Synonym(s) Isopentyl pyruvate;Isoamyl pyroracemate
Latest JECFA evaluation 2001 (Session 57)
Status of specification Full
Chemical name 3-Methylbutyl 2-oxopropanoate
JECFA number 939
CAS number 7779-72-8
FEMA number 2083
COE number 431
FLAVIS number
Molecular weight 158.2
Chemical formula C8H14O3
Physical form/odour colourless liquid with a fresh, caramel-rum odour with fruity-floral undertone
Solubility insoluble in water; soluble in organic solvents, oils
Solubility in ethanol miscible at room temperature
Boiling point (°C) 185°
Assay min % 97%
Acid value max 2
Refractive index 1.417-1.424
Specific gravity 0.972-0.980
Other requirements
ID Test IR