Aldehyde C-11 Undecylenic
POPULAR AND WEIRD / aldehydic · floral · marine
Aldehyde C-11 Undecylenic
| Category | POPULAR AND WEIRD |
| Subcategory | aldehydic · floral · marine |
| Origin | |
| Volatility | Top Note |
| Botanical | N/A — synthetic aldehyde |
| Appearance | colorless to pale yellow clear liquid |
| Odor Strength | high ,recommend smelling in a 1.00 % solution or less |
| Producing Countries | Synthetic — manufactured worldwide |
| Pyramid | Top |
Green-waxy, metallic, slightly floral. Undecylenic aldehyde (C-11) adds clean, fresh, green-metallic quality sharper than decanal.
Scent
Evolution over time
Immediately
Immediately
Sharp metallic-green burst, angular
After a few hours
After a few hours
Green-waxy undertone, less sharp
After a few days
After a few days
Faint clean-metallic trace, mostly dissipated
The Full Story
Did You Know?
Did you know?
The triple combination of C-10, C-11, and C-12 at unprecedented concentrations in 1920s perfumery was considered radical. Ernest Beaux reportedly tested them at concentrations his colleagues thought were errors.
Extraction & Chemistry
Extraction method: Fully synthetic. Not found in significant quantities in natural oils.
| Molecular Formula | C₁₁H₂₀O |
| CAS Number | 112-45-8 |
| Botanical Name | N/A — synthetic aldehyde |
| IFRA Status | No known restrictions |
| Synonyms | UNDECYLENIC ALDEHYDE · C-11 ALDEHYDE |
| Physical Properties | |
| Odor Strength | high ,recommend smelling in a 1.00 % solution or less |
| Lasting Power | 380 hour(s) at 100.00 % |
| Appearance | colorless to pale yellow clear liquid |
| Boiling Point | 98.00 to 100.00 °C. @ 3.00 mm Hg |
| Flash Point | 199.00 °F. TCC ( 92.78 °C. ) |
| Specific Gravity | 0.84000 to 0.84800 @ 25.00 °C. |
| Refractive Index | 1.44000 to 1.44500 @ 20.00 °C. |
In Perfumery
Top-note modifier providing metallic-green brilliance. CAS 112-45-8. Essential in classic aldehydic florals alongside C-10 and C-12.
