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Steareth-2 is a waxy compound that primarily functions as an emulsifier to help water and oil-based ingredients stay together to form an emulsion. It is also a surfactant. Steareth-2 is polyethylene glycol ethers of stearic acid. In cosmetics and personal care products, Steareth ingredients are used in the formulation of personal cleanliness products and deodorants, as well as suntan, fragrance, skin, eye, and hair products. Steareth-2 was nontoxic to rats in acute oral toxicity studies. Steareth-2 in water was neither a primary irritant nor a sensitizer to human skin.