Acacia Farnesiana Extract

Acacia farnesiana (sweet acacia/cassie) extract is a botanical extract often used for skin conditioning or fragrance-adjacent effects, and plant extracts can contain allergenic small molecules even at low use levels. Reports of contact allergy exist for A. farnesiana-derived materials (especially when used for scent), and in eczema-prone or barrier-impaired skin this makes irritation/sensitization plausible in real-world routines. Given the variability in extract composition and the higher-risk sensitive-skin population, I rate it as a moderate irritant where patch testing is prudent. Safety Notes: In mass-market leave-on skincare, Acacia farnesiana extract is often used at trace levels (≈0.0001–0.05%) as a supporting botanical/skin-conditioning claim ingredient or as part of a multi-extract blend where the effective individual extract level is very low. More “natural/actives-forward” consumer products (serums, masks, firming/anti-wrinkle leave-ons) can push total Acacia farnesiana extract to ~1–5% when supplied as a cosmetic-grade glycerin/propylene glycol/water extract and used for film-forming/skin feel benefits; rinse-off products typically sit toward the low end due to short contact time and cost/solids constraints.