sorbitan

Polyoxyethylene Sorbitan Monostearate, an ester derived from the saturated fatty acid stearic acid (C18:0), serves multiple roles in pharmaceutical formulations, including as a surfactant, emulsifier, solubilizer, and wetting agent. As a pharmaceutical excipient—an inert substance that enhances the stability, solubility, and processability of drug formulations—it plays a crucial role in affecting the absorption, distribution, metabolism, and elimination (ADME) processes of drugs [1] [2].

Sorbitan monolaurate (Arlacel 20) is an dehydrated sorbitan ester surfactant commonly used in the skin care industry.

Sorbitan monooleate is a pharmaceutical excipient, a lipophilic nonionic surfactant, and is often used as an emulsifier in cosmetics, food and pharmaceuticals.

Sorbitan monostearate is an ester of stearic acid and sorbitan (a sorbitol derivative), it is also sometimes referred to as a synthetic wax.

Sorbitan Sesquioleate is a synthetic surfactant and emulsifier derived from sorbitol and modified oleic acid.

Span-85 (Sorbitan trioleate) is a synthetic non-ionic emulsifier, which is prepared by partial esterification of sorbitol or sorbitan with food grade palmitic acid. It has low viscosity and the smallest HLB value, so it has the strongest lipophilicity. It is an excellent water-in-oil (w/O) emulsifier and an O/w type auxiliary emulsifier.

Tween-20(Polysorbate 20) ,sorbitan mono-9-octadecanoate poly(oxy-1,2-ethanediyl) derivatives, is used in the formulation of biotherapeutic products for both preventing surface adsorption and as a stabilizer against protein aggregation.

Tween 85 is a nonionic surfactant classified under ethoxylated sorbitan esters. It serves as an emulsifier and solubilizer across various industries, including pharmaceuticals, cosmetics, and food. Owing to its ability to blend oily and aqueous components, it is often utilized in the formulation of creams, lotions, and ointments. Additionally, it functions as a pigment dispersant in the production of paints and coatings.

Adjuvant-4 is a vaccine adjuvant that boosts antigen-specific antibody titers and cytotoxic T lymphocyte (CTL) responses. It typically functions as a water-in-oil emulsifier composed of mineral oil and sorbitan monooleate.