Question: what is in polysorbate 80?
Answer: Polysorbate 80 is a synthetic surfactant composed of fatty acid esters of polyoxyethylene sorbitan [1, 2]. The fatty acid composition is primarily oleic acid, but other fatty acids, such as palmitic or linoleic acid, may be included (Fig. ... Polysorbate 80 has both hydrophobic and hydrophilic moieties [1, 2].