Farnesol ●
TL;DR. This ingredient is primarily used as a fragrance component, adding a soft floral note and helping mask base odors. It can also support deodorant systems because it interferes with odor-forming skin bacteria rather than acting as a primary preservative.
What does Farnesol do in a cosmetic formula?
This ingredient is primarily used as a fragrance component, adding a soft floral note and helping mask base odors. It can also support deodorant systems because it interferes with odor-forming skin bacteria rather than acting as a primary preservative.
Is Farnesol clean?
This ingredient is a recognized fragrance allergen in the EU and must be listed when it exceeds 0.001% in leave-on products or 0.01% in rinse-off products. It is acceptable in many clean frameworks, but its sensitization potential, especially after oxidation, keeps it from being a low-friction choice.
Is Farnesol sustainable?
This material can be sourced from essential oils, fermentation, or synthetic routes, so its footprint depends heavily on the supply chain. It is expected to biodegrade, but plant extraction can be low-yield and synthetic grades may rely on petrochemical inputs.
Is Farnesol COSMOS-approved?
It can be used in COSMOS-certified formulas when it comes from an approved natural aromatic source and meets fragrance-allergen declaration requirements. Its Green Chemistry fit is strongest for renewable or fermentation-derived grades, with the main caveats being oxidation sensitivity and sourcing efficiency.
How does Farnesol work chemically?
The molecule is an acyclic sesquiterpene alcohol with the formula C15H26O, containing a primary alcohol group and three carbon-carbon double bonds. It is lipophilic, used at low fragrance-level concentrations, and benefits from antioxidant protection and air-tight packaging because unsaturated terpene alcohols can oxidize over time.
Last updated 2026-05-13