Castor Oil Polyoxyethylene Ether EL-40 (PEG-40 Castor Oil) is a nonionic surfactant produced by ethoxylation of natural castor oil, with CAS number 61791-12-6. Its molecular structure contains hydrophilic polyoxyethylene chains and lipophilic castor oil fatty acid groups, endowing the product with outstanding amphiphilic properties, effectively reducing oil/water interfacial tension and providing efficient emulsification and dispersion in various systems.
The product appears as a light yellow oily liquid to paste, with a moderate HLB value, suitable as a typical oil-in-water (O/W) emulsifier for emulsifying mineral oils, animal and vegetable oils, and various organic substances. Additionally, it exhibits excellent chemical stability — resistant to hard water, acids, and alkalis, maintaining stable performance over a wide pH and temperature range.
This product shows good compatibility with anionic, cationic, and other nonionic surfactants, allowing flexible compounding. In textile dyeing and finishing, it provides leveling and antistatic functions; in pesticide formulations, it enhances the wetting and spreading ability of the spray liquid; in coatings and inks, it prevents pigment flocculation; in metalworking fluids, it offers both emulsification and lubrication; and in daily chemical products, it serves as a mild solubilizing and cleansing component. It is a multifunctional industrial-grade surfactant.
| Parameter Item | Parameter Content |
|---|---|
| Product Name | Castor Oil Polyoxyethylene Ether EL-40 |
| Chemical Name | Castor Oil Polyoxyethylene (40) Ether (PEG-40 Castor Oil) |
| CAS Number | 61791-12-6 |
| Ionic Type | Nonionic Surfactant |
| Appearance | Light yellow oily liquid to paste |
| Emulsification Type | O/W (Oil-in-Water) Emulsifier |
| HLB Value | Moderate (specific numerical value not available for this parameter) |
| Hard Water Resistance | Excellent |
| Acid and Alkali Resistance | Excellent |
| Compatibility | Good compatibility with anionic, cationic, and nonionic auxiliaries |
Textile Dyeing and Finishing: As an efficient emulsifier and leveling agent, ensuring uniform dye penetration while imparting good antistatic properties and smooth hand feel to fibers. It is recommended to verify dosage through small-scale trials in dyeing auxiliaries formulations based on process conditions.
Pesticide Formulations: As an emulsifying dispersant, it stably disperses oily active ingredients in water, enhancing the wetting and spreading ability of the spray liquid on target surfaces, thereby improving control efficacy. Suitable for emulsifiable concentrates, aqueous emulsions, and other formulation types.
Coatings and Inks: As a pigment wetting dispersant and emulsion polymerization emulsifier, it effectively improves pigment filler dispersion fineness and color development, preventing flocculation, floating, and flooding, and enhancing product storage stability.
Metalworking Fluids: It provides dual roles of emulsification and lubrication, forming stable emulsions during cutting, grinding, and other processes to deliver cooling, lubrication, and rust prevention performance.
Daily Chemicals: In skincare creams, facial cleansers, emulsifying waxes, and other products, it acts as a mild nonionic surfactant, contributing solubilization, emulsification, and cleaning efficacy while imparting a soft touch.