Aldehyde C-11

Aldehyde C-11 is a powerful synthetic aroma chemical used primarily in perfumery and fragrance formulations. The name “Aldehyde C-11” can refer to different commercial aldehydic materials, so the CAS number should be used to confirm the exact grade. A common perfumery material sold as Aldehyde C-11 Undecylenic is 10-Undecenal. It has a strong, diffusive aldehydic character. Even at relatively low concentrations, it can add brightness, lift and freshness to a fragrance composition.

Common Name: Aldehyde C-11 / Aldehyde C-11 Undecylenic
Chemical Name: 10-Undecenal
CAS No.: 112-45-8
Molecular Formula: C₁₁H₂₀O
Molecular Weight: 168.28 g/mol
Appearance: Typically colorless to pale-yellow liquid
Function: Aroma Chemical / Fragrance Ingredient
Odour Profile: Fresh • Aldehydic • Citrusy • Green • Waxy • Clean • Slightly Floral

Uses in Perfumery
Application    Function
Aldehydic Perfumes: Adds sparkling, diffusive aldehydic character
Citrus Accords: Enhances lemony and fresh citrus notes
Floral Fragrances: Adds lift and brightness to floral compositions
Rose Accords: Gives freshness and diffusion
Jasmine & White Florals: Adds a clean, sparkling top-note effect
Green Fragrances: Contributes fresh, crisp character
Soapy/Clean Accords: Creates a clean, freshly washed impression
Fine Fragrance: Used in perfumes, colognes and body fragrances
Soap & Body Wash: Adds fresh, clean fragrance character
Haircare: Used in shampoo and conditioner fragrance compositions

It blends particularly well with bergamot, lemon, orange, rose, jasmine, neroli, lily-of-the-valley-type notes, lavender, musk, woods and other aldehydes.