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delta-Damascone

(E)-1-(2,6,6-trimethyl-1-cyclohex-3-enyl)but-2-en-1-one

Rose ketone 3

Ketone norisoprenoid (rose ketone) · Rose ketone · C₁₃H₂₀O

Chemical structure of delta-Damascone
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
57378-68-4
Molecular formula
C₁₃H₂₀O
Molecular weight
192.30 g/mol
Origin
Synthetic
Odor family
Floral
Note
Heart
Aroma
Blackcurrant, baked apple and rose with a herbal side; highly diffusive.

History

delta-damascone is a synthetic rose ketone not reported in nature, with the ring double bond in position 3.

In perfumery

Widely used in fruity florals and masculine fragrances for lift; tiny amounts suffice.

Connections

EvokesBlackcurrant, Baked apple

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 57378-68-4
  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)