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Online Edition: "Specifications for Flavourings"

Flavouring trans-4-Hexenal
Synonym(s) Hex-4-enal;trans-Hex-4-enal;4-Hexenal trans;E-4-Hexenal
Latest JECFA evaluation 2007 (Session 68)
Status of specification Full
Chemical name 4(E)-Hexenal
JECFA number 1622
CAS number 25166-87-4
FEMA number 4046
COE number
FLAVIS number
Molecular weight 98.14
Chemical formula C6H10O
Physical form/odour Colourless liquid; Green vegetable aroma
Solubility Soluble in hexane and diethyl ether; insoluble in water
Solubility in ethanol Soluble
Boiling point (°C) 125-129°
Assay min % 92% (sum of cis and trans isomers)
Acid value max
Refractive index 1.417-1.424
Specific gravity 0.824-0.832
Other requirements Contains 76% min trans-4-hexenal, 16-20% cis-4-hexenal, 2-4% 3-hexen-1-ol and 1-2% hexanal