PPG-24-Glycereth-24

PPG-24-Glycereth-24 is a synthetic polyether humectant/solubilizer used in leave-on products at low-to-moderate concentrations to improve slip and help disperse oils and fragrances. Polyether surfactant-like materials of this type are generally well tolerated in patch testing, but can cause mild stinging or irritation in compromised barriers (eczema, post-procedure) due to solvent/solubilizing effects and potential impurities. Given sensitive-skin safety considerations and its functional role that can increase penetration of other irritants, a gentle-but-not-inert score is most consistent. Safety Notes: PPG-24-Glycereth-24 is most commonly used as a solubilizer/humectant/emollient co-solvent and sensory modifier, so it appears at very low levels (~0.05–0.3%) in leave-on toners, mists, and serums primarily to aid fragrance/oil solubilization and improve slip. In richer leave-on creams/lotions and some cleansing formats it is frequently used around 0.5–3% to boost glide and reduce tack; in high-slip primers, makeup/skin “smoothing” products, and certain anhydrous or low-water silicone-compatible blends available OTC, concentrations up to ~6–8% are observed to deliver a pronounced feel and solubilization capacity without being prescription/pro-only.