Description
What Is Sorbitan Trioleate?
- Chemical identity: Ester of sorbitol and three molecules of oleic acid; also known as Span 85.
- Appearance: Amber to brownish viscous liquid.
- HLB value: ~1.8, making it highly lipophilic and ideal for water-in-oil (W/O) emulsions.
Key Benefits
- Strong lipophilic emulsification: Ideal for stabilizing W/O emulsions in oil-rich systems.
- Dispersing agent: Excellent for dispersing hydrophobic solids and pigments.
- Low foaming: Suitable for applications requiring minimal aeration.
- Mild and non-irritating: Safe for use in topical and personal care products.
- Synergistic blending: Works well with polysorbates and other sorbitan esters to fine-tune emulsions.
Functional Roles
| Function | Description |
| Emulsifier | Stabilizes W/O emulsions in industrial and cosmetic systems |
| Wetting agent | Improves solubility and spreadability of oils |
| Dispersant | Helps distribute hydrophobic solids and pigments uniformly |
| Stabilizer | Maintains emulsion integrity under heat and shear |
| Solubilizer | Assists in dissolving lipophilic actives and fragrances |
Applications by Industry
- Cosmetics:
- Creams, lotions, sunscreens, balms: Enhances emulsion stability and skin feel
- Pharmaceuticals:
- Used in topical creams and ointments for emulsification and dispersion
- Industrial:
- Lubricants, agrochemicals, coatings, inks: Acts as dispersant, wetting agent, and stabilizer
- Food:
- Rarely used due to its industrial-grade lipophilicity and low HLB
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