Peregal O-25 and other similar products (such as Peregal O-10, O-15, O-20, O-80, etc.) belong to the fatty alcohol polyoxyethylene ether series, all of which are nonionic surfactants. Their performance differences are mainly determined by the number of ethylene oxide (EO) adducts in the molecule. Peregal O-25 has an EO number of 25, which is exactly in the "critical balance zone" of the series—it retains a sufficiently long polyoxyethylene hydrophilic chain to achieve an ultra-high cloud point and strong hydrophilicity (HLB value as high as 16-17), without causing excessive molecular weight, reduced diffusion rate, or excessive foaming due to an overly long EO chain. In contrast, products with lower EO numbers (such as O-10, O-15) have insufficient hydrophilicity and lower cloud points, making them prone to precipitation and failure at high temperatures; while products with excessively high EO numbers (such as O-80, O-50/100) are more hydrophilic, but the large molecular weight reduces penetration rate and interfacial migration ability, and increases foaming, which becomes a disadvantage in spray cleaning and high-temperature dyeing processes.
In high-temperature applications (e.g., textile dyeing soaping at 80-95°C, metal degreasing cleaning at 50-80°C), the high cloud point (91.0~96.0°C) of Peregal O-25 is its core competitiveness. Similar products such as Peregal O-15 (cloud point about 80°C) and Peregal O-20 (cloud point about 85-90°C) begin to become cloudy near the cloud point temperature, and their emulsifying power decreases sharply; while Peregal O-25 remains completely dissolved and maintains excellent emulsifying and dispersing performance even near boiling temperature, ensuring thorough removal of floating color without redeposition. In addition, its low-foaming property (far superior to high-EO products such as O-80) effectively reduces the amount of defoamer needed in CIP cleaning and spray systems, lowering overall operating costs.
From the perspective of product purity and stability, the active content of Guoli Chemical's Peregal O-25 is as high as ≥99%, free alcohol is as low as ≤1.0%, moisture ≤1.0%, iodine value ≤2 g I₂/100g (indicating nearly complete saturation of raw materials and excellent oxidation stability), and acid value and saponification value are controlled at ≤1.0 mg KOH/g and ≤2.0 mg KOH/g respectively. These stringent indicators ensure the absolute reliability of the product in high-end applications such as cosmetics and pesticide formulations, where purity and odor are critical, forming a stark contrast with some similar products that may cause irritation or off-odors due to high free alcohol content.
| Parameter Item | Peregal O-25 | Peregal O-15 (Comparison) | Peregal O-20 (Comparison) | Peregal O-80 (Comparison) |
|---|---|---|---|---|
| EO Adduct Number | Approx. 25 | Approx. 15 | Approx. 20 | Approx. 80 |
| HLB Value | 16.0-17.0 | Approx. 14-15 | Approx. 15-16 | Approx. 18-19 |
| Cloud Point | 91.0~96.0 °C | Approx. 80-85 °C | Approx. 85-90 °C | >100 °C |
| Appearance | White to light yellow solid | White to slightly yellow paste/solid | White to slightly yellow paste | White to slightly yellow flake solid |
| Active Content | ≥99% | No detailed data | No detailed data | No detailed data |
| Free Alcohol | ≤1.0% | No detailed data | No detailed data | No detailed data |
| Surface Tension (0.1% aqueous solution, 25°C) | Approx. 32 mN/m | No detailed data | No detailed data | No detailed data |
| CMC | Approx. 1×10⁻⁵ mol/L | No detailed data | No detailed data | No detailed data |
| Foaming Properties | Low foaming | Low to medium foaming | Low to medium foaming | Medium foaming |
| Chemical Stability | Resistant to acid, alkali, hard water, metal salts | Good | Good | Good |
High-temperature textile dyeing and printing: Peregal O-25 is the preferred choice for reactive dye soaping and vat dye leveling. Recommended dosage is 0.2-1.0 g/L, providing excellent anti-staining and leveling effects continuously at 80-95°C. Products with lower EO numbers are near their cloud point at this temperature and are prone to failure.
High-temperature cleaning of metals and hard surfaces: When used with soda ash or phosphate auxiliaries at 50-80°C, Peregal O-25's low foaming and high cloud point avoid foam overflow and emulsifying power loss, outperforming O-15/O-20.
O/W emulsification in cosmetics: Recommended dosage is 0.5%-5.0%. High purity (≥99%) and low free alcohol (≤1.0%)