A powerful fatty-aldehydic material with a fresh, slightly citrusy character reminiscent of orange peel and rose petal. Undecenal (10-undecenal) has a waxy, soapy quality with a clean floral undertone that becomes softer and more rosy as it dries down.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 1357.
Colorless liquid.
Practically insoluble in water, soluble in alcohol and oils.
Very powerful and diffusive, refreshingly citrusy-waxy, in extreme dilution dry-floral, clean odor.
The title aldehyde (mixture) performs beautifully in soap, and since it can be applied at a fraction of one percent, its relatively high cost does not really limit its use. It gives excellent support to Rose, but it is particularly interesting for “new” experiments in creative perfumery, Ambre, Moss, fruity and “freshair” notes, e.g. with the Mentha Citrata Todd oil N0.664, and with many new Ambregris materials, Lime materials, etc.
1) by isomerization of Undecylenic aldehyde (“’regular”). 2) by catalytic oxidation of isomerized Undecylenic alcohol.