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Online Edition: "Specifications for Flavourings"

Flavouring 1-Methyl-2,3-cyclohexadione
Synonym(s) 3,5,5-Trimethyl-1,2-cyclohexanedione;2-Hydroxyisophorone
Latest JECFA evaluation 1998 (Session 51)
Status of specification Full
Chemical name 1-Methylcyclohexa-2,3-dione
JECFA number 425
CAS number 3008-43-3
FEMA number 3305
COE number 2311
FLAVIS number
Molecular weight 126.16
Chemical formula C7H10O2
Physical form/odour off white to light yellowish-brown powder with a burnt, sweet odour
Solubility insoluble in water
Solubility in ethanol
Boiling point (°C) 69-72° (1 mm Hg)
Assay min % 98.0%
Acid value max
Refractive index
Specific gravity
Other requirements Melting range 57-63°
ID Test IR
Spectrum