|Chemical name||α: 2-methyl-5-(1-methylethyl)-|
|Molecular mass||136.24 g/mol|
|CAS number||α: [99-83-2]|
|Density||α: 0.846 g/cm3|
β: 0.85 g/cm3
|Melting point||α: 125-126°C|
|Boiling point||α: 171-172 °C|
β: 171-172 °C
|Disclaimer and references|
Phellandrene is the name for a pair of organic compounds that have a similar molecular structure and similar chemical properties. α-Phellandrene and β-phellandrene are cyclic monoterpenes and are double bond isomers. In α-phellandrene both double bonds are endocyclic and in β-phellandrene one of them is exocyclic. Both are insoluble in water, but miscible with ether.
α-Phellandrene is a constituent of the essential oils of Eucalyptus dives and of Eucalyptus phellandra (hence the name). β-Phellandrene has been isolated from the oil of water fennel and Canada balsam oil.
The phellandrenes are used in fragrances because of their pleasing aromas. The odor of β-phellandrene has been described as peppery-minty and slightly citrusy.