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Online Edition: "Specifications for Flavourings"

Flavouring Propyleneglycol monohexanoate (mixture of isomers)
Synonym(s) 1,2-Propanediol, 1-hexanoate;Hexanoic acid, 2-hydroxy-1-methylethyl ester
Latest JECFA evaluation 2010 (Session 73)
Status of specification Full
Chemical name Mixture of 2-hydroxypropyl hexanoate and 1-hydroxypropan-2-yl hexanoate
JECFA number 1983
CAS number 39556-41-7;170678-49-6
FEMA number 4469
COE number
FLAVIS number
Molecular weight 174.24
Chemical formula C9H18O3
Physical form/odour Clear colourless liquid; Mild fruity to green ethereal aroma
Solubility Practically insoluble or insoluble in water
Solubility in ethanol Soluble
Boiling point (°C) 263-265°
Assay min % 98%
Acid value max 1
Refractive index 1.430-1.436
Specific gravity 0.963-0.969 (20°)
Other requirements Mixture of isomers: 62% 2-Hydroxypropyl hexanoate; 35% 1-Hydroxypropan-2-yl hexanoate; SC: 2% Propyleneglycol dihexanoic acid ester
ID Test MS