Photo credits: ScenTree SAS
Gamma-Terpinene
Menthadiene-para ; 1-methyl-4-propan-2-ylcyclohexa-1,4-diene ; Crithmene ; 1-methyl-4-isopropyl-1,4-cyclohexadiene ; Para-mentha-1,4-diene ; 4-methyl-1-(1-methylethyl)-1,4-cyclohexadiene ; 1-methyl-4-(1-methyl ethyl)-1,4-cyclohexadiene ; Moslene ; 1-isopropyl-4-methyl-1,4-cyclohexadiene ; 4-isopropyl-1-methyl-1,4-cyclohexadiene
Photo credits: ScenTree SAS
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General Presentation
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CAS N° :
99-85-4 -
EINECS number :
202-794-6 -
FEMA number :
3559 -
FLAVIS number :
01.020
-
JECFA number :
1340 -
Volatility :
Head -
Price Range :
€
Physico chemical properties
-
Appearance :
Colorless liquid -
Density :
0,847 -
Refractive Index @20°C :
Data not available. -
Optical rotation :
Data not available. -
Vapor pressure :
Data not available. -
Flash Point :
56°C
-
Molecular formula :
C10H16 -
Molecular Weight :
136,24 g/mol -
Log P :
4,5 -
Fusion Point :
-10°C -
Boiling Point :
182°C -
Detection Threshold :
Donnée indisponible.
Chemistry & Uses
Year of discovery :
Data not available.
Natural availability :
Gamma-Terpinene is present in a large quantity (around 20%) in Ajowan EO, a seed grown in southern India, botanically close to caraway and cumin. This molecule is also found in Bergamot EO, Cumin EO, Cajuput EO, Eucalyptus delegatensis EO (Ethiopian variety) and Grapefruit EO among others. It can be extracted from all these essential oils by fractional distillation.
Isomerism :
Gamma-Terpinene is the isomer of many other terpenes, including D-Limonene, alpha-Pinene and beta-Pinene and alpha-Terpinene. The latter isomer has a smell that is quite close to gamma-Terpinene, although it is closer to Lime EO, and slightly less terpenic.
Synthesis precursor :
Gamma-Terpinene can be used for the synthesis of other terpenses and sesquiterpenes, always by Diels-Alder reaction. It can be used in other various reactions, such as a hydrolysis reaction. Its structure has a wide range of possible reactions.
Synthesis route :
Like many terpenes, the reaction to obtain Gamma-Terpinene is a Diels-Alder reaction. It involves reacting a molecule called ''diene '' with another called ''dienophile '' to cyclize the molecule. Here, Isoprene (diene) can react with 3-methylbutyne (dienophile). Therefore, gamma-Terpinene results directly from this reaction.
Stability :
Terpenes tend to polymerize by oxydation.
Very unstable in alkaline functional bases as soap. In this base, its smell in not percievable.
Other comments :
Gamma-Terpinene is a monoterpene. This means, as for D-Limonene for example, that this molecule is composed of two units of isoprene, and that it has ten carbon and sixteen hydrogen atoms. This category of terpenes has many isomers. Among other terpinenes, gamma-Terpinene remains the most used, especially in functional products.
The smell of Gamma-Terpinene is less citric than the one of Alpha-Terpinene.
Regulations & IFRA
Allergens :
This ingredient does not contain any allergen.
IFRA 51th :
This ingredient is not restricted for the 51th amendment
