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Okoumal

2,4-Dimethyl-2-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-yl)-1,3-dioxolane

Okoumal

Tetralin ketal · C₁₉H₂₈O₂

Chemical structure of Okoumal
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
131812-67-4
Molecular formula
C₁₉H₂₈O₂
Molecular weight
288.43 g/mol
Origin
Synthetic
Odor family
Woody
Note
Base
Aroma
Warm woody amber with animalic and musky touches; long lasting.

History

Okoumal is a ketal built on a tetralin skeleton, structurally close to the polycyclic musks but smelling of woody amber. The name recalls African okoumé wood.

In perfumery

Okoumal is used to add warmth and depth to woody amber and leather accords.

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 131812-67-4 (formula, names)
  2. The Good Scents Company Information System, material entries
  3. IFRA Standards, 51st Amendment: Index of IFRA Standards (notified 30 June 2023)