What is methyl nonyl ketone

Surely each of us has already encountered them in which either in the pyramid or in a comment aldehydes were stated as an ingredient or fragrance. But like me, one or the other has probably already asked themselves, what is it actually, where do they come from and how do they smell anyway? :

So I looked into the topic and I was able to determine the following:

Aldehydes are synthetic fragrances that enable a wealth of idiosyncratic, brilliant fantasy notes and fragrance compositions and serve to stabilize fragrances.

I was able to research the following aldehydes:


Aldehyde C9
Dehydration of n-nonanol, the natural component of some citrus oils, as well as rose, cinnamon and orris root oil
very waxy with floral accents

Aldehyde C10
Dehydration of n-decanol, the natural component of citrus oils
strong, somewhat sweet, citrus-like, slightly rancid and greasy

Aldehyde C11
Reduction of undecylenic acid chloride according to Rosemund
intensely waxy, metallic, green tones and green rose

Aldehyde C12
Dehydration of lauric alcohol, the natural component of pine needle oil
fresh, spicy, spicy, flowery, light wax note

Aldehyde C12 MNA
From methyl nonyl ketone and cholesterol ester via glycidic ester and glycidic acid
dry, slightly fruity, amber and incense-like with floral, waxy accents

From tulol to benzal chloride, the natural component of bitter almond oil
very strong sweet and bitter almond-like

Condensation of para-tert-butylbenzaldehyde with propionaldehyde with subsequent hydrogenation
finely flowery, lily, lily of the bells, tulip, soft, green accent

Made from benzaldehyde and acetaldehyde, the natural component of cinnamon bark and cassia oil
powerful, typical cinnamon scent

Synthetic, e.g. B. from isoprene via metalheptenone and dehydrolinalool. Made from essential oils such as lemongrass and Litsea Cubeba, the natural component of essential oils such as lemon oil, Eucalyptus staigeriana, lime oil
strong lemon scent, somewhat green, bitter

Synthetically from pinene via myrcene, geraniol. Distillation from citronella oil or eucalyptus cidriodora
herbaceous, tart, clear citrus note, green accents

Cyclamen aldehyde
From coumaric aldehyde and propionaldehyde with subsequent hydrogenation
flowery, clear green accents and notes of watermelon

By Dills-Alder condensation of acrolein and merylpentadiene
green, grassy, ​​impression of grass, leaves and damp earth

Oxidation of isosafrole, the natural component of e.g. B. of pepper oil
sweet, flowery-narcotic, warm, reminiscent of almonds

alpha-hexyl cinnamon aldehyde
From benzaldehyde and octanal
flowery, soft, clear jasmine note

Methyl octyl acetaldehyde
Hydrogenation of alpha-methylene decanal
very dry, citrus-like, reminiscent of orange peel

2,6-nonadienal (violet leaf aldehyde)
Oxidation of nonadienol from violet leaves
extremely strong, green; thinned reminiscent of violet leaves and cucumber

Phenylacetaldehyde (hyacinth aldehyde)
Isomerization of styrene oxide from narcisse absolute, neroli and rose oil
strong green flowery hyacinth-like with bitter almond note

Phenol aldehyde, e.g. B. from lignin or guaiacol, the natural component of vanilla pods, Peru balsam, tolu balsam and Benzoin Siam / Benzoin Sumatra
sweet, creamy, typical vanilla scent

Conclusion: With the help of aldehydes, fragrances can be produced that would hardly be possible with natural components. Be it that the natural components show chemical reactions with one another or against each other and change as a result, or result in an undesirable color of the fragrance, or be it because strong notes would simply "cover" weaker ones and the weaker notes do not achieve the desired effect, or is it simply because the perfumer's imagination opens up greater possibilities by adding aldehydes.

Are from today's world of fragrances Aldehydes It is hard to imagine life without it, almost every perfume contains aldehydes, especially since in the course of time many natural fragrances have been banned either for reasons of intolerance or for nature conservation reasons.

Aldehydes were formed in the 20s of the last century. Their most famous and the first representative from such fragrances is the legendary Chanel N ° 5.

This list does not claim to be complete and I will continue to research and possibly add it as soon as something new arises.

Source: The H&R Book Perfume

Last edited by Florblanca on December 28, 2011, 11:54 am, edited once in total