Phellandrene
| Phellandrenes | |
|---|---|
| α-Phellandrene α-Phellandrene
|
β-Phellandrene β-Phellandrene
|
| α: 2-Methyl-5-(1-methylethyl)-1,3-cyclohexadiene | |
| Identifiers | |
| CAS number | 99-83-2 7px, (α) 555-10-2 (β) |
| Jmol-3D images | Image 1 |
| |
| Molecular formula | C10H16 |
| Molar mass | 136.24 g/mol |
| Appearance | Colorless oil (α and β) |
| Density | α: 0.846 g/cm3 β: 0.85 g/cm3 |
| Boiling point |
α: 171-172 °C |
| Solubility in water | Insoluble (α and β) |
| 14px (verify) (what is: 10px/10px?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
| Infobox 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 was named after Eucalyptus phellandra, now called Eucalyptus radiata, from which it can be isolated.[2] It is also a constituent of the essential oil of Eucalyptus dives.[3] 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.
The alpha phellandrene isomer can form hazardous and explosive peroxides on contact with air at elevated temperature.[4]
References
- ↑ The Merck Index, 12th Edition, 7340, 7341
- ↑ Jacobs, S.W.L., Pickard, J., Plants of New South Wales, 1981, ISBN 0-7240-1978-2.
- ↑ Boland, D.J., Brophy, J.J., and A.P.N. House, Eucalyptus Leaf Oils, 1991, ISBN 0-909605-69-6.
- ↑ Script error
