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Online Edition: "Specifications for Flavourings"

Flavouring 2-Methyl-2-pentenal
Synonym(s) 2,4-Dimethyl crotonaldehyde;alpha-methyl-beta-Ethyl acrolein
Latest JECFA evaluation 2003 (Session 61)
Status of specification Full
Chemical name 2-Methyl-2-pentenal
JECFA number 1209
CAS number 623-36-9
FEMA number 3194
COE number
FLAVIS number 05.090
Molecular weight 98.15
Chemical formula C6H10O
Physical form/odour colourless to yellow-green mobile liquid; powerful grassy green, slightly fruity aroma
Solubility Insoluble in water; soluble in ether, benzene, methanol
Solubility in ethanol soluble
Boiling point (°C) 137°
Assay min % 92%
Acid value max 3
Refractive index 1.445-1.453
Specific gravity 0.855-0.865
Other requirements SC: propionaldehyde, propionic acid