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General Presentation
-
CAS N° :
562-74-3 -
EINECS number :
209-235-5 -
FEMA number :
2248 -
FLAVIS number :
02.072
-
JECFA number :
439 -
Volatility :
Head -
Price Range :
€
Physico chemical properties
-
Appearance :
Colorless liquid -
Density :
0,931 -
Refractive Index @20°C :
Data not available. -
Optical rotation :
Data not available. -
Vapor pressure :
Data not available. -
Flash Point :
79°C
-
Molecular formula :
C10H18O -
Molecular Weight :
154,25 g/mol -
Log P :
Donnée indisponible. -
Fusion Point :
Donnée indisponible. -
Boiling Point :
89°C -
Detection Threshold :
Donnée indisponible.
Chemistry & Uses
Year of discovery :
Data not available.
Natural availability :
Terpinen-4-ol is present in many essential oils, especially aromatic ones. It is found in a large quantity in Marjoram EO and in Tea Tree EO. It is present in moderate quantities in Lavender EO, Nutmeg EO and Blackcurrant Bud Absolute.
Isomerism :
Terpinen-4-ol used in perfumery, and often found in nature, is a racemic mixture of its two enantiomers, dextrorotatory and levorotatory. Both have an equivalent odor, which explains the use of the mixture of the two isomers. Terpinen-4-ol is also a positional isomer of Alpha-Terpineol, which has a more floral and less earthy odor.
Synthesis precursor :
Terpinen-4-ol can be used for the synthesis of Alpha-Terpineol. The goal of this synthesis is to shift the alcohol function of the initial molecule to its neighbouring carbon. However, this synthesis is not very common.
Synthesis route :
Terpinen-4-ol is often synthesized at a low cost as a by-product in the synthesis of Alpha-Terpineol from Terpine hydrate. The resulting molecule is not completely pure. Nevertheless, it is possible to synthesize pure Terpinen-4-ol from Terpinolene by photosensitized oxidation, followed by reduction of the intermediary peroxide, and selective hydrogenation of the intermediate alcohol formed.
Stability :
Terpenes tend to polymerize under the effect of high oxydation, and are unstable in alkaline and acidic bases.
Other comments :
Terpinen-4-ol is a monoterpene. This means, as for D-Limonene, that this molecule is composed of two isoprene units, and therefor ten carbon atoms. This category of terpenes includes many isomer.
Regulations & IFRA
Allergens :
This ingredient does not contain any allergen.
IFRA 51th :
This ingredient is not restricted for the 51th amendment
