Farnesyl Acetate

Farnesyl acetate is primarily used as a fragrance/perfumery ingredient (and sometimes as a skin-conditioning agent) at low concentrations, but fragrance materials as a class are overrepresented in patch-test positives and can trigger irritant or allergic reactions in eczema-prone skin. While it is not an exfoliating acid or high-potency active, the sensitization risk profile typical of fragrance ingredients warrants a moderate score and a patch-test recommendation for highly sensitive users. Safety Notes: Farnesyl acetate is primarily used in OTC skincare as a fragrance/perfuming component or minor emollient, so it is often present at trace levels in complex fragrance blends (down to ~0.0001%) in both leave-on and rinse-off products. In consumer products that feature stronger fragrance loads (e.g., perfumed body lotions, creams, and wash products) or niche formulations using terpene esters more deliberately, total farnesyl acetate can reach the low tenths of a percent, with an observed upper end around ~0.5% while still remaining within typical IFRA-style fragrance-use practices and skin tolerability constraints.