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Azurone

7-(3-Methylbutyl)-2H-1,5-benzodioxepin-3(4H)-one

Azurone

Benzodioxepinone · Benzodioxepinone · C₁₄H₁₈O₃

Chemical structure of Azurone
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
362467-67-2
Molecular formula
C₁₄H₁₈O₃
Molecular weight
234.29 g/mol
Origin
Synthetic
Odor family
Marine
Note
Heart
Aroma
Marine, mineral, watery and ozonic; cleaner and less melon-like than Calone.

History

Azurone is Givaudan's trade name for 7-(3-methylbutyl)-1,5-benzodioxepin-3-one, sharing Calone's skeleton with an isoamyl chain.

In perfumery

Used at very low levels for marine and mineral effects in modern fragrances.

Connections

EvokesSea, Wet stone

Regulatory status

No specific limit
IFRA 51
No dedicated IFRA Standard in the IFRA library as of Amendment 51.
EU CosReg
No specific entry in Annex II or III of Regulation (EC) 1223/2009.
EU allergen 2023/1545
Not on the list of fragrance allergens requiring labelling, including after Regulation (EU) 2023/1545.

Sources

  1. NCI/CADD Chemical Identifier Resolver, CAS 362467-67-2
  2. IFRA Standards Library, Amendments up to 51
  3. Regulation (EC) No 1223/2009, consolidated text of 18.05.2026, Annexes II and III