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beta-Damascenone

(E)-1-(2,6,6-trimethyl-1-cyclohexa-1,3-dienyl)but-2-en-1-one

Rose ketone 4, Damascenone

Ketone norisoprenoid (rose ketone) · Rose ketone · C₁₃H₁₈O

Chemical structure of beta-Damascenone
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
23696-85-7
Molecular formula
C₁₃H₁₈O
Molecular weight
190.28 g/mol
Introduced
1970 · Firmenich (identified in nature)
Origin
Natural
Odor family
Floral
Note
Heart
Aroma
Rose, baked apple, honey, prune and tobacco; extremely potent.

History

beta-damascenone was identified in Bulgarian rose oil by Demole and colleagues at Firmenich, published in 1970. Though present in tiny amounts, it contributes strongly to rose odour. It forms from carotenoid breakdown and occurs in wine, bourbon, apple and tobacco.

In perfumery

Used at parts-per-million levels in rose, dried fruit and tobacco accords.

Connections

EvokesRose, Prune
Found in natureDamask rose, Tobacco, Wine

Regulatory status

IFRA · EU max 0.02% · Rose ketones
IFRA 51
Restricted by an IFRA Standard (entry "Rose ketones"), current version issued at Amendment 49. Maximum levels differ across the 12 product categories.
EU CosReg
Annex III, entry 157 (rose ketones group): maximum 0.02% total rose ketones in the finished product; labelled collectively as "Rose Ketones".
EU allergen 2023/1545
Quy (EU) 2023/1545 sung ghi "Rose Ketones" khi 0.001 da) 0.01 ra 31/7/2026, 31/7/2028. Regulation (EU) 2023/1545 added labelling as "Rose Ketones" above 0.001% (leave-on) and 0.01% (rinse-off). Transition: placing on the market until 31 July 2026, making available until 31 July 2028.

Sources

  1. NCI/CADD Chemical Identifier Resolver, CAS 23696-85-7
  2. IFRA Standards Library, Amendments up to 51
  3. Regulation (EC) No 1223/2009, consolidated text of 18.05.2026, Annexes II and III
  4. Commission Regulation (EU) 2023/1545 amending Annex III (fragrance allergen labelling)
  5. Demole E., Enggist P., Säuberli U., Stoll M., Kováts E. sz. (1970) Helvetica Chimica Acta 53 (structure of damascenone from Bulgarian rose oil)