Styrax Benzoin Resin Extract

Styrax benzoin resin extract is a fragrance/resinous botanical used mainly for scent/fixative benefits (often at low percentages), but it contains aromatic resins and cinnamate/benzoate-related constituents that are well-documented causes of allergic contact dermatitis and can also be irritating on compromised skin. In sensitive populations (eczema, barrier-impaired, post-procedure), even small amounts can trigger delayed sensitization reactions, so it should be treated as a significant risk ingredient and avoided or patch-tested. Safety Notes: In mainstream consumer skincare and wash-off products, Styrax Benzoin Resin Extract is most often used as a fragrance/conditioning botanical at very low levels (typically around 0.001–0.1%), reflecting allergen/sensitization considerations for balsamic resins in leave-on formats. Higher concentrations are observed in consumer-available specialty balms, salves, and resin-based perfumed skincare where benzoin is used for its scent/fixative and film-forming character, commonly ~0.5–2% and up to about 5% in some anhydrous or low-water leave-on balms; rinse-off products generally stay at the low end.