Sorbeth-30 Tetraoleate

Sorbeth-30 Tetraoleate is a nonionic surfactant/solubilizer and emulsifier used at low percentages (often ~1–10%) to disperse oils and pigments, and it is generally well-tolerated compared with harsher anionic surfactants. However, as a solubilizer it can increase penetration of other lipophilic substances and may cause mild stinging or barrier disruption in highly reactive or eczema-prone skin, especially in leave-on cleansing balms/oil-based systems. Given its overall low intrinsic reactivity but real potential to contribute to irritancy in compromised skin, a gentle (not “very gentle”) score is most consistent with patient-safety considerations. Safety Notes: Sorbeth-30 Tetraoleate is used as a nonionic emulsifier/solubilizer for high-oil systems and in cleansing oils/balms and microemulsions; in many leave-on emulsions and makeup removers it appears at low support levels around 0.1–1% to aid solubilization and stability. In consumer oil cleansers, balm-to-oil cleansers, and anhydrous/microemulsified makeup remover formats, it is commonly used at 2–10%, with high-strength specialty OTC products reaching ~12–15% to solubilize heavy oils and pigments while maintaining rinseability.