para-Cresol
Naturelle - Synthétique
Animalic > Leather > Almondy
Crédits photo: ScenTree SAS
Other names :
4-methylphenol ; 4-cresol ; 1-hydroxy-4-methylbenzene ; 4-hydroxytoluene ; Para-methyl hydroxybenzene ; Para-methyl phenol ; Para-methylphenol ; Para-oxytoluene
Volatility :
Base
Uses in perfumery :
para-Cresol is used in floral notes of narcissus, jasmine, tuberose, for the contribution of an animalic facet.
Natural availability :
Para-Cresol is present in Castoreum Absolute, Grandiflorum Jasmine Absolute and in Ylang-Ylang Extra EO (and other ylang fractions), from which it can be extracted in its natural state.
Year of discovery :
Data not available.
Other comments :
Para-Cresol is said to be 'phenolic'. This molecule is emblematic of this facet. The difference between this molecule and Para-Cresyl acetate is in its almond facet, replaced by a floral facet in the latter.
Price Range :
€€
Stability :
Most of the time, the occurrence of a benzenic cycle in a molecule causes a coloration of this molecule through time
Crédits photo: ScenTree SAS
- Molecular formula :
- C7H8O
- Molecular Weight :
- 108,14 g/mol
- Density :
- 1,034
- Flash Point :
- 85°C
- Fusion Point :
- 33°C
- Appearance :
- White solid
- Log P :
- 1,94
- Boiling Point :
- 202°C
- Detection Threshold :
- Entre 55 et 100 ppb (0,00001%)
Synthesis route :
The synthesis of para-Cresol is done by a phenol methylation, which can be done using different catalysts. Not all catalysts are selective in the same way, and do not necessarily give the same isomers ratio of Cresol in the end. Here, the structure of the catalyst that is used must be favourable to the formation of the methyl function in opposition to the alcohol function. Regardless of the catalyst, the synthesis is always made during the gaseous phase and at very high temperature.
Synthesis precursor :
Para-Cresol is at the origin of several syntheses used today. It allows to synthesize compounds such as para-Cresyl acetate or para-Cresyl Phenylacetate by a simple esterification reaction. It is also involved in the synthesis of Anisaldehyde by an oxidation reaction and then, by methylation of the intermediate product.
Isomerism :
As already mentioned, para-Cresol has two positional isomers. Ortho-Cresol has a moldy, leather and plastic smell. Meta-Cresol has a woodier smell and para-Cresol has a much more floral smell.
- EINECS number :
- 203-398-6
- FEMA number :
- 2337
- JECFA number :
- 693
- FLAVIS number :
- 04.028
- Allergens :
- This ingredient does not contain any allergen.
- IFRA :
- This ingredient is restricted by IFRA
- Restriction type :
- RESTRICTION
- Cause of restriction :
- DEPIGMENTATION
- Amendment :
- 51
- Quantitative usage limits :
-
Cat.1 Cat.2 Cat.3 Cat.4 Cat.5 Cat.6 Cat.7 Cat.8 Cat.9 Cat.10 Cat.11 0.0050 % 0.0050 % 0.0050 % 0.0050 % 0.0050 % 0.0050 % 0.0050 % 0,0017 % 0.0050 % 0.0050 % 0,0017 %
This ingredient is not restricted for the 49th amendment
To learn more about IFRA's standards : https://ifrafragrance.org/safe-use/library
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