Cinnamyl Alcohol

Cinnamyl Alcohol is a fragrance ingredient (EU-listed fragrance allergen) commonly used at low concentrations, but it has well-documented potential to cause allergic contact dermatitis and can also sting/irritate compromised skin. In sensitive populations (eczema, barrier-impaired, post-procedure), even trace fragrance allergens can trigger significant reactions, so I score it as high irritancy risk from both sensitization and cumulative exposure in full routines. Safety Notes: Cinnamyl Alcohol is primarily used as a fragrance component (and EU-declarable fragrance allergen), so it often appears at trace levels in scented skincare where it is present as part of a fragrance compound, with commercial products commonly landing around the low ppm range (~0.0001–0.01%). The highest observed OTC consumer levels are in strongly fragranced leave-on products (e.g., perfumes/body lotions) and some fragranced rinse-off cleansers where the fragrance load is higher; in these cases cinnamyl alcohol can reach roughly 0.1–0.3% depending on the fragrance design. For leave-on products, allergen labeling thresholds in the EU (0.001% leave-on; 0.01% rinse-off) often drive disclosure and tend to keep typical use low, but they do not function as hard maximum limits.