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Chemical structures
α-Terpinene β-Terpinene γ-Terpinene
Chemical names α: 4-methyl-1-(1-methylethyl)-1,3-cyclohexadiene
β: 4-methylene-1-(1-methylethyl)cyclohexene
γ: 4-methyl-1-(1-methylethyl)-1,4-cyclohexadiene
Chemical formula C10H16
Molecular mass 136.24 g/mol
CAS numbers α: [99-86-5]
γ: [99-85-4]
Densities α: 0.8375 g/cm3
β: 0.838 g/cm3
γ: 0.853 g/cm3
Melting point α: 60-61°C
Boiling points α: 173.5-174.8 °C
β: 173-174 °C
γ: 183 °C
β: C=C1CC=C(C(C)C)CC1
γ: CC1=CCC(C(C)C)=CC1
Disclaimer and references

The terpinenes are three isomeric hydrocarbons that are classified as terpenes. They each have the same molecular formula and carbon framework, but they differ in the position of carbon-carbon double bonds. α-Terpinene has been isolated from cardamom and marjoram oils, and from other natural sources. β-Terpinene has no known natural source, but has been prepared synthetically from sabinene. γ-Terpinene is natural and has been isolated from a variety of plant sources.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Terpinene". A list of authors is available in Wikipedia.
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