Name: Sorbitan tristearate CAS Registry Number: 26658-19-5 Sorbitan tristearate, also known as Span 65, is a nonionic surfactant. It is variously used as a dispersing agent, emulsifier, and stabilizer, in food and in aerosol sprays. As a food additive, it has the E number E492. The consistency of sorbitan tristearate is waxy; its color is light cream to tan