Oleyl Erucate Good Occlusive-opacifying agent Hydration Oleyl Erucate at a glance Ester of oleyl alcohol and erucic acid Serves as a humectant Also a solvent and opacifier Ruled safe as used in cosmetics Oleyl Erucate description Oleyl erucate is an ester of oleyl alcohol (which can be derived from fish oil and vegetable sources) and erucic acid, a type of omega fatty acid. In cosmetics, it primarily functions as a humectant, meaning it attracts water to skin. It also works as an occlusive and opacifying agent and solvent. On skin it’s known for aiding spreadability of creams and for its non-greasy finish. The independent Cosmetic Ingredient Review has deemed oleyl erucate safe in its current usage in cosmetics, where its percentage used ranges from 1-12%. Oleyl erucate is also known by the trade name TEGOSOFT® OER MB. Related ingredients: Oleyl Alcohol Humectants