Chemical Name: 2-Methylundecanal
Common Name: Aldehyde C-12 MNA
Molecular Formula: C₁₂H₂₄O
Molecular Weight: 184.32 g/mol
CAS Number: 110-41-8
Appearance: Clear, colorless to pale yellow liquid
Odor: Waxy, citrusy, metallic, aldehydic
Boiling Point: ~243°C (469°F)
Flash Point: ~107°C (225°F)
Solubility: Insoluble in water; soluble in alcohol and perfume oils
Functional Group: Aldehyde (–CHO)
Perfumery Profile
Scent Profile:
- Citrusy and waxy
- Soapy and metallic
- Slightly green and ozonic
- Very diffusive and potent even in trace amounts
Use in Perfumery:
- Known for giving perfumes a sparkling, luminous lift
- Plays a key role in aldehydic floral fragrances, often used to enhance radiance and airiness
- Strong impact even at low concentrations due to its volatility and tenacity
- Often used in blends with Aldehyde C-10 and C-11 for a classic aldehydic effect
Fragrance Families:
- Aldehydic
- Floral
- Citrus
- Green
- Ozonic/Soapy
Notable Use:
- One of the essential aldehydes used in Chanel No. 5 for its sparkling top note
- Common in fine perfumery, luxury soaps, and vintage-style aldehydic compositions