INCI Name
2-Methylundecanal
Functions
1 Roles
Sustainability
5/10
Category
fragrances
What It Does
2-Methylundecanal, commonly known as Aldehyde C-12 MNA (methyl nonyl acetaldehyde), is a branched-chain aliphatic aldehyde that imparts a clean, waxy, citrus-like, and slightly floral character with a distinctive aldehydic lift. It is a key component in classic fine fragrance compositions, most famously associated with the aldehydic top notes that defined iconic 20th-century perfumes. Formulators select it for its ability to add brightness, diffusion, and a sophisticated 'soapy-clean' facet to both rinse-off and leave-on cosmetic products, and it is used at low concentrations due to its high odor intensity.
Technical Properties
Ionic Charge
nonionic
Molecular charge type
Viscosity Effect
neutral
Impact on formula thickness
Foaming Ability
none
Lather generation
Ingredient Compatibility
Works Well With
Avoid Combining
Sustainability Profile
Sustainability Score
Biodegradability
readily biodegradable
Source
synthetic
Feedstock
petrochemical or oleochemical synthesis via aldol condensation or oxidation of fatty alcohol derivatives
Related Ingredients
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Quick Reference
- Full INCI Name
- 2-Methylundecanal
- Common Name
- Aldehyde C-12 MNA
- Category
- fragrances