The main component of Span S-85 is Sorbitan Trioleate, also known as sorbitan trioleate, with CAS number 26266-58-0. It is a highly lipophilic nonionic surfactant.
Detailed Description
Span S-85 (Span 85) is sorbitan trioleate prepared by esterification of sorbitan with three molecules of oleic acid. It belongs to the class of nonionic surfactants. In its molecular structure, sorbitan acts as the hydrophilic group, while three long-chain oleic acid fatty chains serve as the lipophilic groups, imparting a very low HLB value (approximately 1.8) and strong lipophilic characteristics, making it a key emulsifier for preparing stable water-in-oil (W/O) emulsion systems.
As one of the main products of Haian Guoli Chemical Co., Ltd., Span S-85 appears as an amber to brownish-yellow viscous oily liquid. It is chemically stable, resistant to acids, alkalis, and hard water, maintains activity under a wide range of environmental conditions, and has good compatibility with various oils, waxes, and active ingredients.
Technical Parameters
| Parameter Item | Parameter Content |
|---|
| Chemical Name | Sorbitan Trioleate (Sorbitan trioleate) |
| CAS Number | 26266-58-0 |
| Aliases | Span 85, Span S-85, S-85 |
| Product Type | Nonionic Surfactant |
| Appearance | Amber to brownish-yellow viscous oily liquid |
| HLB Value | Approximately 1.8 |
| Hydrophilic-Lipophilic Balance | Strongly lipophilic |
| Emulsion Type | Water-in-oil (W/O) |
Application Recommendations
With its strong lipophilic properties and high emulsifying capacity, Span S-85 is widely used in the following fields:
- Cosmetics: W/O emulsifier for oil-based formulations such as cold creams, massage creams, sunscreens, and liquid foundations.
- Pharmaceutical Preparations: Emulsifier for topical ointments, suppository bases, and cream bases, promoting uniform drug dispersion.
- Industrial Fields: Emulsion stabilizer in metalworking cutting fluids and rust preventive oils; pigment wetting and dispersing aid in coatings and inks.
- Petroleum Extraction: Emulsion stabilizer in drilling fluids and fracturing fluids, suitable for high-temperature and high-salinity formation conditions.
- Textile Industry: Component in finishing oils for synthetic fiber filaments and antistatic agents.
Precautions
- This product is not a hazardous chemical and has no special hazard statements; however, it is recommended to wear protective gloves and goggles during handling.
- Store in a cool, dry, well-ventilated area, keep container tightly closed, and avoid contact with strong oxidizers.
- Prolonged or repeated skin contact may cause mild skin dryness; it is slightly irritating to the eyes.
- Water hazard class WGK 1; do not discharge undiluted or untreated directly into water bodies.
