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Cyclopentadecanone

Cyclopentadecan-1-one

Exaltone, Normuscone, Exaltone

Macrocyclic ketone · C₁₅H₂₈O

Chemical structure of Cyclopentadecanone
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
502-72-7
Molecular formula
C₁₅H₂₈O
Molecular weight
224.39 g/mol
Introduced
1926 · Leopold Ružička; marketed by Firmenich as Exaltone
Origin
Synthetic
Odor family
Musk
Note
Base
Aroma
Dry, clean musk with a waxy, powdery feel; close to muscone but with less animal character.

History

Cyclopentadecanone is the 15-membered ring ketone without a methyl group, in effect muscone minus one methyl. Ružička made it during his macrocycle work in the mid 1920s, in collaboration with the Geneva company that later became Firmenich. It was among the first synthetic macrocyclic musks to be sold, under the name Exaltone.

In perfumery

Exaltone adds diffusion and tenacity to the base without pushing it toward an animal direction. It is often combined with macrolide musks for a clean, warm musk tone.

Connections

Evokesmusk deer musk

Regulatory status

Unrestricted · No IFRA standard
IFRA 51
No dedicated IFRA Standard in the 51st Amendment index.
EU allergen 2023/1545
Not named individually in the expanded allergen list of Regulation 2023/1545.

Sources

  1. NCI/CADD Chemical Identifier Resolver, CAS 502-72-7 (formula, names)
  2. Nobel Prize in Chemistry 1939, Leopold Ružička (work on polymethylenes and higher terpenes)
  3. Sell C.S. (ed.) The Chemistry of Fragrances: From Perfumer to Consumer, 2nd ed., Royal Society of Chemistry 2006
  4. The Good Scents Company Information System, material entries
  5. IFRA Standards, 51st Amendment: Index of IFRA Standards (notified 30 June 2023)