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Aldehyde C-11 (undecanal)

Undecanal

Undecylic aldehyde, Aldehyde C-11 undecylic

Aliphatic aldehyde · C₁₁H₂₂O

Chemical structure of Aldehyde C-11 (undecanal)
2D structure PubChem / NCI CIR

Chemical info

CAS number CAS
112-44-7
Molecular formula
C₁₁H₂₂O
Molecular weight
170.29 g/mol
Origin
Nature-identical
Odor family
Aldehyde Aldehydic
Note
Top
Aroma
Waxy, soapy and faintly floral, softer than C-10, with a slight metallic edge.

History

Undecanal is the saturated eleven-carbon aldehyde, often called "C-11 undecylic" to separate it from C-11 undecylenic, which carries a double bond.

In perfumery

Used in aldehydic and clean-laundry accords, usually at very low levels.

Connections

EvokesSoap

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 112-44-7
  2. IFRA Standards Library, Amendments up to 51
  3. Regulation (EC) No 1223/2009, consolidated text of 18.05.2026, Annexes II and III