Terpinen-4-ol
Naturelle - Synthétique
Herbal > Camphoric > Coniferous > Earthy > Rosy
Crédits photo: ScenTree SAS
Other names :
4-carvomenthenol ; 4-methyl-1-(1-methylethyl)-3-cyclohexen-1-ol ; Para-menth-1-en-4-ol ; 1-para-menthen-4-ol ; Origanol ; 1-isopropyl-4-methyl-3-cyclohexen-1-ol ; Terpinenol
Volatility :
Head
Uses in perfumery :
Terpinen-4-ol is used for aromatic accords, around pine, pepper and geranium, especially in detergents and functional perfumes. It brings an earthy effect.
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.
Year of discovery :
Data not available.
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.
Price Range :
€
Stability :
Terpenes tend to polymerize under the effect of high oxydation, and are unstable in alkaline and acidic bases.
Crédits photo: ScenTree SAS
- Molecular formula :
- C10H18O
- Molecular Weight :
- 154,25 g/mol
- Density :
- 0,931
- Flash Point :
- 79°C
- Fusion Point :
- Donnée indisponible.
- Appearance :
- Colorless liquid
- Log P :
- Donnée indisponible,
- Boiling Point :
- 89°C
- Detection Threshold :
- Donnée indisponible.
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.
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.
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.
- EINECS number :
- 209-235-5
- FEMA number :
- 2248
- JECFA number :
- 439
- FLAVIS number :
- 02.072
- Allergens :
- This ingredient does not contain any allergen.
- IFRA :
- This ingredient is not restricted
To learn more about IFRA's standards : https://ifrafragrance.org/safe-use/library
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