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Online Edition: "Specifications for Flavourings"

Flavouring Citral dimethyl acetal
Synonym(s) 3,7-Dimethyl-2,6-octadienyl dimethyl acetal
Latest JECFA evaluation 2001 (Session 57)
Status of specification Full
Chemical name 1,1-Dimethoxy-3,7-dimethyl-2,6-octadiene
JECFA number 944
CAS number 7549-37-3
FEMA number 2305
COE number 39
FLAVIS number
Molecular weight 198.31
Chemical formula C12H22O2
Physical form/odour colourless to yellowish liquid with a mild, fresh, citrus, herbaceous odour
Solubility insoluble in water; soluble in organic solvents, oils
Solubility in ethanol miscible at room temperature
Boiling point (°C) 105-106° (10 mm Hg)
Assay min % 92% (sum of isomers)
Acid value max 2
Refractive index 1.450-1.463
Specific gravity 0.881-0.893
Other requirements Minimum assay (sum of isomers + hemiacetals + citral): 98%
ID Test IR