Technical detail
The twelve-carbon aliphatic aldehyde has a cleaner, less fatty character than C-10 and a less sharp green quality than C-9. Perfumers distinguish two commercial forms: Aldehyde C-12 MNA (2-methylundecanal), a so-called "lauric" variant with a more refined floral quality, and Aldehyde C-12 Lauric (dodecanal proper), which has a blunter soapy-waxy facet (ISIPCA teaching material, accessed 2026-05-27).
In the aldehyde complex of Chanel No 5 and its contemporaries, C-12 contributes the soapy-clean, slightly powdery layer that sits below the brighter C-10 and C-11. It is also used independently in chypre, fougère, and modern musk compositions for its fixative and brightness properties. At high concentration it smells industrial and metallic; at controlled doses it reads as crisp and clean (Perfumer & Flavorist, accessed 2026-05-27).
Examples
- Chanel No 5 (1921, Ernest Beaux): Aldehyde C-12 forms the base layer of the iconic aldehyde complex alongside C-10 and C-11.
- Arpège (Lanvin, 1927, André Fraysse): another classic aldehydic floral where C-12 contributes the warm soapy facet.
- Modern reformulations in niche perfumery sometimes use the MNA variant of C-12 for a more nuanced, less retro-soapy quality.
Sources
- Perfumer & Flavorist: aliphatic aldehyde palette (accessed 27 May 2026)
- ISIPCA teaching material on synthetic molecules (accessed 27 May 2026)
- IFRA ingredient data, Dodecanal (accessed 27 May 2026)