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Online Edition: "Specifications for Flavourings"

Flavouring Isobutyraldehyde
Latest JECFA evaluation 2000 (Session 55)
Status of specification Full
Chemical name 2-Methylpropanal
JECFA number 252
CAS number 78-84-2
FEMA number 2220
COE number 92
FLAVIS number
Molecular weight 72.11
Chemical formula C4H8O
Physical form/odour colourless, mobile liquid with a sharp, pungent odour
Solubility miscible with alcohol, ether; soluble in water 1 ml in 125 ml
Solubility in ethanol
Boiling point (°C) 64°
Assay min % 98%
Acid value max 5
Refractive index 1.369-1.379
Specific gravity 0.783-0.788
Other requirements
ID Test IR