Polysorbate Industrial Chemical is a class of emulsifiers used in some pharmaceuticals and food preparation. They are often used in cosmetics to solubilize essential oils into water-based products. Polysorbates are oily liquids derived from ethoxylated sorbitan (a derivative of sorbitol) esterified with fatty acids. An oily liquid derived from PEG-ylated sorbitan (a derivative of sorbitol) esterified with fatty acids. Commonly known as polysorbate 80, is a synthetic compound that is widely applied in a variety of fields, including foods, medicines, and cosmetics.