Benzyl Alcohol

Benzyl Alcohol is an aromatic alcohol that serves a dual role in cosmetic formulations as both a broad-spectrum preservative and a solvent, effective primarily against bacteria and yeasts at concentrations of 0.5–3%. It is a listed allergen under EU cosmetic regulations (one of the 26 fragrance allergens requiring declaration above 0.001% in leave-on and 0.01% in rinse-off products), which distinguishes it from many other preservatives and necessitates label disclosure. Formulators value it for its relatively mild preservative profile, its ability to dissolve difficult actives and fragrances, and its synergistic effect when combined with other preservatives such as phenoxyethanol or organic acids, allowing for reduced overall preservative load.