Dihydrocholeth-30

Dihydrocholeth-30 is a nonionic surfactant/solubilizer (PEG-ether of hydrogenated cholesterol) used at low levels in cleansers and emulsions to help disperse oils and stabilize formulas. Nonionic ethoxylated surfactants are generally well-tolerated, but can still cause mild stinging or barrier disruption in highly reactive or eczematous skin, especially in leave-on products or when combined with other surfactants. Based on typical use concentrations and low but non-zero irritation reports for similar PEG surfactants, I rate it as gentle with minimal risk rather than exceptionally gentle. Safety Notes: Dihydrocholeth-30 (a high-EO cholesterol-derived nonionic solubilizer/emulsifier) is most often encountered at very low levels in leave-on serums, toners, and sprays (~0.05–0.5%) to solubilize small amounts of fragrance, essential oils, or lipophilic actives and improve clarity. In richer leave-on creams/cleansers and micellar-type systems it can be used more structurally as part of the surfactant/emulsifier package (commonly ~1–4%). High-strength consumer-available solubilizing concentrates and some cleansing/oil-solubilizing formulations can reach the upper end around ~6–8%, with higher use levels generally limited by tack/foaming, irritation potential in leave-on formats, and cost rather than specific regulatory caps.