Photo credits: ScenTree SAS
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General Presentation
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CAS N° : : 557-48-2
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EINECS number : 209-178-6
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FEMA number : 3377
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Density : 0,86
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Optical rotation : Lorem Ipsum
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Allergens : This ingredient does not contain any allergen.
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Refractive Index @20°C : Lorem Ipsum
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Volatility : Head
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Price Range : €€€€€
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Appearance : Colorless liquid
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FLAVIS number : 05.058
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JECFA number : 1186
Information on synthetic ingredients
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Acid Value : Lorem Ipsum
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Boiling Point : 95°C (à 18 mmHg)
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Detection Threshold : De l'ordre du ppb, 10 millionièmes de pourcent
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Molecular formula : C9H14O
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Log P : Donnée indisponible.
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Molecular Weight : 138,21 g/mol
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Fusion Point : Donnée indisponible.
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Flash Point : 83°C
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Vapor pressure : Lorem Ipsum
Uses
Other comments :
Trans-2-cis-6-Nonadienal, like cis-6-Nonenal, is a very powerful note, with a very low detection threshold (in the order of ppb, or 10 millionths of a percent). It must therefore be used in dilution in the compositions. In addition, it is more used for cucumber notes than cis-6-Nonenal, which is more reminiscent of melon.
In comparision to Trans-2-cis-6-Nonadienal, both molecules have a common violet leaf usage, but Trans-2-cis-6-Nonadienol still has a more floral and soft touch.
Both raw materials are also very costly.
Stability :
Aldehydes may form diethylacetals in alcoholic perfumes, with no real impact on their smell.
Very unstable in acid cleaners and very alkaline products. Exclusively stable in shampoo, soap and fabric care bases.
Uses in perfumery :
Trans-2-cis-6-Nonadienal is used in marine, cucumber and melon notes, to bring, in small quantities, a vegetal bouquet effect.
Year of discovery :
Data not available.
Isomerism :
The diastereoisomers of the molecule all have a relatively similar smell reminiscent of cucumber and violet leaf. Nevertheless, trans-2-cis-6-Nonadienal is the most commonly used isomer. Triplal® is a constitutional isomer of trans-2-cis-6-Nonadienal, but has a very green-cut grass smell, which is very different.
Synthesis precursor :
Trans-2-cis-6-Nonadienal forms Schiff bases in the presence of Methyl Anthralinate or Indole.
Natural availability :
Trans-2-cis-6-Nonadienal was found to be one of the major compounds responsible for the smell of Violet Leaf Absolute. It is the most used plant to isolate this molecule.
Synthesis route :
Trans-2-cis-6-Nonadienal is synthesized by a condensation of malonic acid with cis-4-Heptenal to give trans-2-cis-6-nonadienoic acid. Then, an esterification reaction with methanol in an acidic medium allows to obtain the corresponding ester. A reduction of this ester with lithium tetrahydruroaluminate allows to synthesize the corresponding alcohol. Finally, an oxidation with potassium permanganate allows to obtain the desired final aldehyde.
Regulations & IFRA
This ingredient is not restricted
