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α-Vetivone

4,4a-Dimethyl-6-(propan-2-ylidene)-4,4a,5,6,7,8-hexahydronaphthalen-2(3H)-one

alpha-Vetivone, Isonootkatone

Sesquiterpene ketone (eremophilane) · C₁₅H₂₂O

Chemical structure of α-Vetivone
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
15764-04-2
Molecular formula
C₁₅H₂₂O
Molecular weight
218.34 g/mol
Origin
Natural
Odor family
Woody
Note
Base
Aroma
Dry vetiver wood with a rooty quality and a faint grapefruit touch.

History

α-Vetivone and β-vetivone are the characteristic ketones of vetiver oil. α-Vetivone is structurally close to nootkatone from grapefruit, which helps explain the faint grapefruit note in vetiver.

In perfumery

α-Vetivone mainly matters as a constituent of vetiver oil and as an analytical marker of oil quality.

Connections

Evokesvetiver
Found in natureVetiver (Chrysopogon zizanioides)

Regulatory status

Natural constituent · 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. Wikidata Q8083965 (CAS 15764-04-2, formula; data mirrored from PubChem)
  2. Sell C.S. (ed.) The Chemistry of Fragrances: From Perfumer to Consumer, 2nd ed., Royal Society of Chemistry 2006
  3. The Good Scents Company Information System, material entries