Peregal O-25, chemically named fatty alcohol polyoxyethylene (25) ether, with CAS number 68439-49-6, molecular formula C16-18H33-37O(C2H4O)25H, is a nonionic surfactant prepared by condensation reaction of natural fatty alcohol with ethylene oxide. The product appears as a white to light yellow flaky or lumpy solid, with a melting point of 35~40°C and a density of about 1.06 g/cm³. It is readily soluble in water, ethanol, acetone and other organic solvents, but insoluble in petroleum ether. It has strong hydrophilicity, high HLB value (16.0~17.0), cloud point (1% aqueous solution) 91.0~96.0°C, measured cloud point above 100°C, making it an excellent oil-in-water (O/W) type emulsifier.
This product is chemically stable, resistant to acids, alkalis, hard water, and metal salts, and is a low-foaming surfactant. Moisture content ≤1.0%, active matter content ≥99%, free alcohol content ≤1.0%, heavy metal content ≤10 mg/kg, arsenic content ≤2 mg/kg. The kinematic viscosity at 50°C is about 100~130 mm²/s, surface tension of 0.1% aqueous solution is about 32 mN/m (25°C), critical micelle concentration is about 1×10⁻⁵ mol/L. Iodine value ≤2 g I₂/100g, indicating very low unsaturation and good oxidation stability.
| Item | Specification |
|---|---|
| Chemical Name | Fatty alcohol polyoxyethylene (25) ether / Octadecanol polyoxyethylene (25) ether |
| CAS Number | 68439-49-6 |
| Ionic Type | Nonionic |
| Appearance | White to light yellow solid |
| Molecular Formula | C16-18H33-37O(C2H4O)25H |
| Molecular Weight | Approx. 1354 g/mol |
| Melting Point | 35~40 °C |
| Density | ~1.06 g/cm³ |
| HLB Value | 16.0~17.0 |
| Cloud Point (1% aqueous solution) | 91.0~96.0 °C |
| pH (1% aqueous solution) | 5.5~7.5 |
| Active Matter Content | ≥99% |
| Moisture | ≤1.0% |
| Hydroxyl Value | 37.0~41.0 mg KOH/g |
| Acid Value | ≤1.0 mg KOH/g |
| Saponification Value | ≤2.0 mg KOH/g |
| Iodine Value | ≤2 g I₂/100g |
| Free Alcohol | ≤1.0% |
| Surface Tension (0.1%, 25°C) | Approx. 32 mN/m |
| Critical Micelle Concentration (CMC) | Approx. 1×10⁻⁵ mol/L |
| Kinematic Viscosity (50°C) | Approx. 100~130 mm²/s |
| Flash Point | >200°C |
| Solubility | Readily soluble in water, ethanol, acetone; insoluble in petroleum ether |
| Foam Characteristics | Low foaming |
| Heavy Metals | ≤10 mg/kg |
| Arsenic (As) | ≤2 mg/kg |
| Hygroscopicity | Certain hygroscopicity |
| Chemical Stability | Resistant to acids, alkalis, hard water, oxidants; good stability |
| Packaging Specification | 20kg woven bag |
Note: The above data are from the product database of Guoli Chemical.
Based on its high HLB value, excellent emulsifying ability and high cloud point, Peregal O-25 is suitable for the following fields: Used as a leveling agent and soaping agent in textile dyeing and printing, recommended dosage 0.2~1.0 g/L; for industrial and domestic metal degreasing cleaning, can be used with alkaline additives at 50~80°C; as an O/W emulsifying solubilizer in cosmetics and personal care products, recommended dosage 0.5%~5.0%; as a nonionic emulsifying component in pesticide formulations for emulsions and microemulsions; as a wetting and softening agent in paper industry. It is recommended to dissolve by stirring in hot water above 60°C or prepare a stock solution in advance for accurate addition.