Sorbitan trioctadecanoate
Sorbitan trioctadecanoate (CAS: 26658-19-5), known as Span 65, is a non-ionic lipophilic surfactant formed by esterifying sorbitan with three stearic acid chains. This cream-colored waxy solid functions primarily as a water-in-oil emulsifier and stabilizer with a very low hydrophilic-lipophilic balance, making it ideal for structuring oil-rich formulations and providing texture to creams and ointments. In cosmetics and pharmaceuticals, it thickens emulsions, prevents phase separation, and enhances stability of topical products, frequently paired with polysorbates to achieve desired emulsion characteristics. The food industry employs it as emulsifier E492 in confectionery, chocolate, and baked goods to control fat crystallization and improve texture. Industrial uses include textile lubricants, metalworking fluids, and polymer processing aids where its waxy consistency and emulsifying power add value. With established safety and multifunctional performance, sorbitan tristearate is a versatile formulation ingredient.
– Emulsion Structuring: Used in creams and ointments to stabilize water-in-oil systems, provide body, and prevent phase separation in oil-rich formulations.
– Food Emulsification: Approved as emulsifier E492 in confectionery, chocolate coatings, and baked goods to control fat bloom and improve mouthfeel.
– Pharmaceutical Topicals: Serves as a co-emulsifier and consistency agent in ointments, suppositories, and dermatological preparations.
– Industrial Processing Aids: Applied in textile softeners, metalworking lubricants, and plastic processing as an emulsifier and internal lubricant.
Product Name: Sorbitan trioctadecanoate
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