Castor Oil Polyoxyethylene Ether EL-60 (CAS No.: 61791-12-6) is produced by using natural castor oil as the starting material and adding 60 moles of ethylene oxide (EO) to castor oil molecules through a catalytic ethoxylation process. Its approximate molecular formula is C57H104O9(C2H4O)60, with a molecular weight of about 3570. This product belongs to the nonionic surfactant category and appears as a light yellow to yellow viscous liquid or paste with a slight characteristic odor.
In terms of molecular structure, the hydroxyl groups (-OH) in the castor oil molecule undergo ring-opening polymerization with ethylene oxide, forming hydrophilic polyoxyethylene chains, while the long-chain fatty acid part of castor oil provides hydrophobicity. This unique "hydrophilic-hydrophobic" block structure gives EL-60 excellent oil-in-water (O/W) emulsifying ability, with an HLB value as high as 14.5. It is easily soluble in water, ethanol, ether, and many other solvents. The product has an extremely high effective ingredient content (≥99%) and contains almost no free alcohol or other impurities, ensuring batch-to-batch performance consistency and formulation stability.
Castor Oil Polyoxyethylene Ether EL-60 produced by Guoli Chemical strictly follows quality control standards, with low heavy metal content (Pb ≤10 mg/kg, As ≤2 mg/kg), complies with non-hazardous substance classification, is non-irritating to skin and eyes (verified by OECD 404 and 405 tests), and exhibits readily biodegradable properties (degradation rate >60% under OECD 301B standard). It is a green nonionic surfactant that combines high performance with environmental friendliness.
| Parameter | Specification/Value |
|---|---|
| Chemical Name | Polyoxyethylene (60) Castor Oil / PEG-60 Castor Oil |
| CAS No. | 61791-12-6 |
| Approximate Molecular Formula | C57H104O9(C2H4O)60 |
| Molecular Weight | ~3570 |
| Appearance | Light yellow to yellow viscous liquid or paste |
| Ion Type | Nonionic |
| Active Matter Content | ≥99% |
| Solid Content | ≥99% (~100%) |
| HLB Value | 14.5 |
| Cloud Point (1% aqueous solution) | ≥90°C |
| pH (1% solution) | 5.0-7.0 |
| pH (5% solution) | 5.0-7.0 |
| Density (25°C) | 1.05-1.07 g/cm³ |
| Refractive Index (25°C) | 1.470-1.475 |
| Kinematic Viscosity (40°C) | 200-400 mm²/s |
| Low Shear Viscosity (25°C) | 1000-5000 mPa·s |
| Surface Tension (0.1% solution, 25°C) | Approx. 42 mN/m |
| Critical Micelle Concentration CMC (25°C) | Approx. 0.03 g/L |
| Hydroxyl Value | 40-50 mg KOH/g |
| Acid Value | ≤1.0 mg KOH/g |
| Saponification Value | 45-55 mg KOH/g |
| Iodine Value | ~22 g I2/100g |
| Solidification Point | Approx. 5-10°C |
| Flash Point | >200°C |
| Water Content | ≤0.5% |
| Solubility | Easily soluble in water, ethanol, ether and other organic solvents |
| Foam Characteristics | Low foaming |
| Chemical Stability | Stable, not easily hydrolyzed; alkali resistant |
| Hygroscopicity | Hygroscopic |
| Heavy Metals (as Pb) | ≤10 mg/kg |
| Arsenic (As) | ≤2 mg/kg |
Based on the high HLB value (14.5) and nonionic nature of Castor Oil Polyoxyethylene Ether EL-60, its core application is as an efficient oil-in-water (O/W) emulsifier, particularly suitable for the following fields: