Octadecylamine Polyoxyethylene Ether AC-1820 (CAS No.: 26635-75-6) is a non-ionic surfactant prepared by polymerization of octadecyl fatty amine with 20 ethylene oxide molecules. The product appears as light yellow to yellow solid at room temperature (melting point approx. 35°C), readily soluble in water and various organic solvents. Its unique molecular structure imparts pH-dependent ionic conversion characteristics—it behaves as a non-ionic surfactant under neutral and alkaline conditions, while protonating to exhibit cationic properties in acidic media. This duality offers wide application flexibility in textile dyeing and printing, pesticide emulsification, industrial cleaning, and other fields.
Key indicators of this product include: active content ≥99%, HLB value 15.4, cloud point of 1% aqueous solution >100°C, indicating strong hydrophilicity and high-temperature stability. Surface tension is approximately 35 mN/m (1% solution, 25°C), and critical micelle concentration is about 60 mg/L, demonstrating excellent surface activity and wetting/spreading ability. The product exhibits strong tolerance to acidic and alkaline environments, is insensitive to hard water ions, and has low foam, particularly suitable for industrial formulation systems that require stable performance under a wide range of operating conditions.
All technical parameters are derived from actual test data in the product database of Guoli Chemical, serving as technical references for formulation design and quality control.
| Basic Information | |
|---|---|
| Product Name | Octadecylamine Polyoxyethylene Ether AC-1820 |
| Synonyms | Octadecylamine Polyoxyethylene Ether (20), PEG-20 Stearylamine, Ethoxylated Stearylamine, Antistatic Agent AC-1820, Leveling Agent AC-1820 |
| CAS No. | 26635-75-6 |
| Molecular Formula | C58H119NO20 |
| Molecular Weight | Approx. 1150 |
| Ionic Type | Non-ionic (exhibits cationic properties under acidic conditions) |
| Appearance | Light yellow to yellow |
| Solubility | Readily soluble in water and organic solvents |
| Physicochemical Properties | |
| HLB Value | 15.4 |
| Cloud Point (1% Aqueous Solution) | >100°C |
| Melting Point | Approx. 35°C |
| Density (25°C) | Approx. 1.04 g/cm³ |
| Kinematic Viscosity (40°C) | Approx. 200 mm²/s |
| Low Shear Viscosity (25°C) | Approx. 300 mPa·s |
| Refractive Index (20°C) | Approx. 1.460~1.470 |
| Flash Point | >200°C |
| Hygroscopicity | Slightly hygroscopic |
| Surface Tension (1% Solution, 25°C) | Approx. 35 mN/m |
| Critical Micelle Concentration (25°C) | Approx. 60 mg/L |
| Foam Characteristics | Low foaming |
| Penetrating Power (Canvas Sinking Method) | >200 seconds |
| Chemical Stability | Stable at room temperature, avoid strong oxidizing agents |
| Alkali Resistance | Stable under alkaline conditions |
| Quality Specifications | |
| Active Content | ≥99% |
| pH Value (1% Aqueous Solution) | 6.0~8.0 |
| pH Value (5% Aqueous Solution) | 6.0~8.0 |
| Moisture Content | ≤0.5% |
| Acid Value | ≤1 mgKOH/g |
| Iodine Value | ≤2 gI₂/100g |
| Hydroxyl Value | Approx. 98 mgKOH/g |
| Amine Value | 50~60 mgKOH/g |
| Tertiary Amine Content | ≥95% |
| Unsaturation | ≤0.1 mol/kg |
| Free Alcohol | ≤1% |
| Heavy Metals (as Pb) | ≤10 mg/kg |
| Arsenic (As) | ≤2 mg/kg |
| Packaging Specifications | |
| Packaging Options | 50kg plastic drum, 200kg plastic drum, IBC tote |
Based on the physicochemical properties of this product—HLB value as high as 15.4, cloud point >100°C, low foam, and strong resistance to acids and alkalis—the following application scenarios are particularly recommended: