(2E,6Z)-Nonadienal (CAS N° 557-48-2)​

Photo credits: ScenTree SAS

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(2E,6Z)-Nonadienal

(2E,6Z)-nona-2,6-dienal ; Cucumber aldehyde ; Nona-2-trans-6-cis-dienal ; Violet leaf aldehyde

(2E,6Z)-Nonadienal (CAS N° 557-48-2)​

Photo credits: ScenTree SAS

Company Ingredient Name ID Comments Naturality Certifications Purity Latin name Treated part Geographical origin MOQ
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2,6-NONADIENAL WITH ATP 441N030000 Visit website Je me procure cet ingrédient Synthetic Aroma Chemicals Certifications : Kasher - - - UK -

2,6-NONADIENAL WITH ATP

ID : 441N030000

UK

Certifications : Certifications : Kasher

Information Générales

General Presentation

  • CAS N° :

    557-48-2
  • EINECS number :

    209-178-6
  • FEMA number :

    3377
  • FLAVIS number :

    05.058
  • JECFA number :

    1186
  • Volatility :

    Head
  • Price Range :

    €€€€€
Physico-chemical properties

Physico chemical properties

  • Appearance :

    Colorless liquid
  • Density :

    0,85 - 0,87 @20°C
  • Refractive Index @20°C :

    1,471 - 1,476 @20°C
  • Optical rotation :

    Data not available.
  • Vapor pressure :

    Data not available.
  • Flash Point :

    83°C
  • Molecular formula :

    C9H14O
  • Molecular Weight :

    138,21 g/mol
  • Log P :

    Donnée indisponible.
  • Fusion Point :

    Donnée indisponible.
  • Boiling Point :

    95°C (à 18 mmHg)
  • Detection Threshold :

    De l'ordre du ppb, 10 millionièmes de pourcent
Utilisation

Chemistry & Uses

Year of discovery :

Data not available.

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.

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.

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.

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.

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.

Utilisation

Regulations & IFRA

Allergens :

This ingredient does not contain any allergen.

IFRA 51th :

This ingredient is not restricted for the 51th amendment

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