Photo credits: ScenTree SAS
Pear Ester
Ethyl 2,4-decadienoate ; Ethyl deca-2,4-dienoate ; Ethy trans-2-cis-4-decadienoate ; Ethyl deca-trans-2-cis-4-dienoate ; Ethyl (E)-2-(Z)-4-decadienoate ; Ethyl deca-(E)-2-(Z)-4-dienoate ; Ethyl decadienotate ; Ester poire ; Ethyl (E,Z)-2,4-décadienoate ; Ester de poire
Photo credits: ScenTree SAS
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General Presentation
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CAS N° : 3025-30-7
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EINECS number : 221-178-8
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FEMA number : 3148
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FLAVIS number : 09.260
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JECFA number : 1192
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Appearance : Colorless liquid
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Density : 0,91
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Volatility : Head/Heart
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Price Range : €€€€
Physico-chemical properties
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Molecular formula : C12H20O2
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Molecular Weight : 196,29 g/mol
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Log P : 4,61
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Fusion Point : <-60°C
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Boiling Point : 71°C (à 0,07 hPa)
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Detection Threshold : 100 ppb (0,00001%)
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Optical rotation : Donnée indisponible
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Vapor pressure : Donnée indisponible
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Refractive Index @20°C : Donnée indisponible
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Acid Value : Donnée indisponible.
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Flash Point : 113°C
Uses
Uses in perfumery :
Pear Ester is used in apple and pear reconstitutions, in association with violet notes (Alpha-Ionone, Beta-Ionone), with exotic fruits notes. It can also bring the fruity aspect of a rose accord.
Year of discovery :
Data not available.
Natural availability :
Pear Ester is so-called because it is found in the odorous principle of pears, and particularly in Williams pears. It is also found in apple, grapes, durian and other fruits. It does not exist on a natural state for perfumery.
Isomerism :
Pear Ester is a purely isomeric component. It is the major component formed during its synthesis, also including ethyl trans-2-trans-4-decadienoate, its diastereoisomer. It is separated from this component by fractionnal distillation. Pear Ester also is a constitutionnal isomer of numerous other esters as Linalyl acetate, Geranyl acetate and Allyl Cyclohexyl Propionate.
Synthesis precursor :
Pear Ester is not used for the synthesis of another compound used in perfumery.
Synthesis route :
Pear Ester is prepared in three steps. Starting from cis-1-heptenyl, the first step is a conversion of this molecule into 1-heptenyl lithium, in the presence of a lithium and copper iodide complex. Reacting the intermediary product with Ethyl Propiolate leads to a mixture of Pear Ester (95% of the mixture) and trans-2-trans-4-decadienoate (5% of the mixture). The last step is a fractionnal distillation to purify Pear Ester. Pear Ester is also prepared on a biotechnological way. The latter is not detailled here.
Regulations & IFRA
Allergens :
This ingredient does not contain any allergen.
IFRA 51th :
This ingredient is not restricted for the 51th amendment
