overview
Common Name: Span 85
CAS Number: 26266-58-0
EINECS Number: 247-557-8
Molecular Formula: C60H108O8 (typical composition)
Molecular Weight: Approx. 971.5 g/mol
Sorbitan Trioleate, also known as Span 85, is a nonionic surfactant resulting from the esterification of sorbitol with three moles of oleic acid.
It is primarily used as a water-in-oil (W/O) emulsifier, dispersant, and stabilizer in a wide range of industrial and personal care formulations.
Span 85 is especially valued for its high lipophilicity and excellent compatibility with oils, making it effective in emulsifying systems with high oil content.
Molecular structure description
Hydrophilic part: Sorbitan (dehydrated sorbitol) core
HLB value: ~2.4 (highly lipophilic, ideal for water-in-oil emulsions)
Specifications
Due to its very low HLB value (approximately 1.8), Span 85 is ideally suited for stabilizing water-in-oil emulsions, especially in applications requiring excellent oil phase stability and water resistance. It is commonly used in:
Industrial lubricants
Metalworking fluids
Textile auxiliaries
Cosmetic creams and ointments
Agrochemical formulations
Its strong dispersing ability and emollient effect also make it useful in pigment pastes, oil-based suspensions, and waterproof cosmetics.
| Test Item | Unit | Minimum Value | Maximum Value |
|---|---|---|---|
| Saponification Value | mgKOH/g | 165 | 180 |
| Iodine Value | mgKOH/g | 60 | 80 |
| Acid Value | mgKOH/g | — | 15 |
| Moisture | % | — | 1.5 |
Applications
It works effectively in water-in-oil emulsions and offers excellent compatibility with other nonionic surfactants.
Its mild nature and versatility make it a preferred ingredient in formulations requiring stability and safety.
Emulsification Efficiency – Stable W/O Emulsions
Sorbitan esters are highly effective in forming stable water-in-oil emulsions. Ideal for margarine, creams, and ointments, they help maintain consistency and prevent separation over time.
Mild & Skin-Friendly – Ideal for Cosmetics
Widely used in lotions, creams, and makeup products, sorbitan esters are non-irritating and suitable for sensitive skin. They provide smooth textures and enhance product stability.
Food Grade & Safe – Emulsifiers for Processing
Approved for food use, they act as emulsifiers in sauces, dairy products, and spreads. Improve mouthfeel, extend shelf life, and maintain homogeneity of processed foods.
Pharmaceutical Use – Enhances Drug Stability
Used in medicinal creams, gels, and suspensions, sorbitan esters help deliver oil-soluble actives effectively. They improve bioavailability and ensure long-term formulation stability.
storage & package
Storage:
Store in a cool, dry, and well-ventilated area, away from direct sunlight and sources of heat.
Avoid contact with harmful or incompatible substances. Handle with care during transportation to prevent leakage or contamination.
Transportation:
Transport as a general chemical product, following standard safety and handling procedures.
Package:
Sorbitan Trioleate is packed in high-quality PE drums with double-seal lids.
Standard packaging sizes include 25kg/drum, 200kg/drum, and 1000kg IBC tote to meet different usage needs.
25 Kg /drum
200kg/drum
