What it is
Phenethyl alcohol is a colorless aromatic alcohol that occurs naturally in rose and other floral oils and is also produced synthetically. In sunscreens it serves a dual role: it has antimicrobial activity that supports the preservative system and it carries a soft floral odor that contributes to scent. It is commonly paired with other mild preservatives in formulas marketed as gently preserved.
Safety & warnings
Phenethyl alcohol is generally well tolerated, but as an aromatic alcohol with a floral odor it can act as a fragrance component and may contribute to scent-related sensitivity in fragrance-reactive individuals. It is used at low concentrations in finished products.
Origin & sourcing
Both natural and synthetic; it occurs in rose, carnation, and other floral essential oils and is also manufactured for commercial use.
Questions everyone asks
Why is phenethyl alcohol in a fragrance-free sunscreen?
It is often added for its mild preservative-boosting activity rather than as a declared fragrance, though it does carry a faint floral odor.
Is phenethyl alcohol drying like other alcohols?
No. Unlike volatile alcohols such as ethanol, it is an aromatic alcohol used at low levels and is not used as a drying solvent.