para-cymene
Synthétique
Citrus > Zesty > Terpenic > Mandarin
Crédits photo: ScenTree SAS
Other names :
4-cymene ; 1-isopropyl-4-methylbenzene ; 1-methyl-4-isopropylbenzene ; 4-isopropyltoluene ; p-Isopropyltoluene; para-isopropyltoluene ; 4-cymol ; Cumene ; Camphogen ; Cymol ; p-Cymol , p-cymène , Cymene ; Dolcymene
Volatility :
Head
Uses in perfumery :
Data not available.
Natural availability :
Paracymene is found in a very large number of oils. It is one of the most important terpenes in perfumery. It is therefore possible to find this ingredient in its natural state as well as in the overwhelming majority of current chromatography.
Year of discovery :
Data not available.
Other comments :
The quality featured here is a quality containing 100% renewable carbon.
Price Range :
€
Stability :
Data not available.
Crédits photo: ScenTree SAS
- Molecular formula :
- C10H14
- Molecular Weight :
- 134,22 g/mol
- Density :
- 0,855 - 0,860 @20°C 0,852 - 0,857 @25°C
- Flash Point :
- 44°C (111°F)
- Fusion Point :
- Donnée indisponible.
- Appearance :
- Colorless liquid
- Log P :
- 4,7
- Boiling Point :
- 176 - 177°C
- Detection Threshold :
- Donnée indisponible.
Synthesis route :
It has been described that cymene can be produced by alkylation of toluene with either propylene or isopropyl alcohol.
Methods for direct conversion of terpenes into cymene have also been described. These methods include for example conversion by acidic clays, oxidation with Cr(VI) compounds and transition metal based reactions. Vapour reactions using pure terpenes and Pd catalysts or Zn/Cr catalysts have been reported.
Synthesis precursor :
p-cymene is as a starting material for p-cresol production via the Hock-Lange synthesis pathway
La tonalide® aussi first cyclialkylated with neohexene followed by acetylation of the resulting tetralin
Acetophenone - Par condensing cymene with acetyl chloride in the presence of AlCl3
Gamma-terpinene - from p-cymene by the action of sodium and alcohol in liquid ammonia.
Moskene resulted from condensing p-cymene with i-butyl alcohol in the presence of sulfuric acid and nitrating the resulting product (Barbier, 1932)
The first reported ''the active odor principle '' of Phantolid was outlined for the reaction of ί-amyl alcohol and cymene in the presence of sulfuric acid (Weber et al, 1955) - Process remplacé par un autre + optimisé
Isomerism :
Paracymene is the most common isomer, however, orthocymene and metacymene also exist in smaller amounts. They are not widely used in perfumery.
- EINECS number :
- 202-796-7
- FEMA number :
- 2356
- JECFA number :
- 1325
- FLAVIS number :
- 01.002
- 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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