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Online Edition: "Specifications for Flavourings"

Flavouring p-Mentha-1,4-diene
Synonym(s) gamma-Terpinene;1-Isopropyl-4-methyl-1,4-cyclohexadiene;1-Methyl-4-(1-methylethyl)-1,4-cyclohexadiene
Latest JECFA evaluation 2004 (Session 63)
Status of specification Full
Chemical name p-Mentha-1,4-diene
JECFA number 1340
CAS number 99-85-4
FEMA number 3559
COE number
FLAVIS number 01.020
Molecular weight 136.24
Chemical formula C10H16
Physical form/odour Colourless oily liquid; refreshing, herbaceous-citrusy aroma
Solubility Insoluble in water; soluble in most fixed oils
Solubility in ethanol Soluble
Boiling point (°C) 182°
Assay min % 95%
Acid value max <1.0
Refractive index 1.472-1.478
Specific gravity 0.841-0.845
Other requirements Minimum assay value may include traces of limonene, alpha and beta pinene and other common C10H16 terpenes