Rhus Verniciflua Peel Wax

Rhus verniciflua (lacquer tree) is botanically associated with urushiol-type allergens, and Rhus-derived materials are well recognized in dermatology for causing allergic contact dermatitis even at very low exposure levels. Although the peel wax is typically used at low concentrations as a structuring/emollient wax, the potential for sensitization and significant reactions in eczema-prone or highly reactive patients warrants a cautious, high irritancy score. Safety Notes: Rhus Verniciflua Peel Wax is used as a structuring/thickening wax in stick and balm formats, and at very low levels as a minor rheology/texture modifier in emulsions and makeup-type skincare; commercial INCI lists commonly imply sub-1% use when it appears mid-to-late in the list (often ~0.05–0.5%). The highest consumer-available levels are found in anhydrous lip balms, solid perfume-style balms, and some stick moisturizers/occlusive barrier products where the wax can be a primary structurant alongside other waxes (commonly ~5–15%). Rinse-off products rarely use it above trace-to-low levels due to waxy residue and deposition concerns, while leave-on anhydrous systems support the upper end of the range.