MONSA® Steareth-21

INCI name: Steareth-21

MONSA® Steareth-21 is a nonionic surfactant used as an emulsifier and detergent, often in cosmetics as an emulsifier to help water and oil-based ingredients mix to form emulsions.

Steareth-21, a derivative of polyoxyethylene with 21 moles of ethylene oxide, manifests as a nearly colorless white solid featuring a faint, waxy scent. Classified as a nonionic surfactant, it operates effectively as an oil-in-water emulsifier, characterized by an HLB value of 15.5, making it ideal for formulating emulsions in cosmetic products such as creams and lotions with polar oils.