Stearylamine Polyoxyethylene Ether AC-1812, chemically named Stearylamine Polyoxyethylene (12) Ether, has a molecular formula of approximately C₁₈H₃₇N(CH₂CH₂O)₁₂H and a molecular weight of about 800. It belongs to nonionic surfactants but can exhibit cationic characteristics under acidic conditions. The product appearance is a light yellow to yellow paste or viscous liquid, slightly hygroscopic. It remains stable over a wide pH range, resistant to dilute acids and alkalis, and has excellent hard water resistance, unaffected by calcium and magnesium ions.
This product is highly soluble in water and various organic solvents. The pH value of its 1% aqueous solution is stable between 6.0 and 8.0. As a low-foaming surfactant, the cloud point of its 1% aqueous solution is not less than 90°C, indicating its suitability for high-temperature and high-pressure process environments. Its surface tension is approximately 30-35 mN/m, and the critical micelle concentration (CMC) ranges from 0.01 to 0.1 g/L, demonstrating efficient interfacial activity.
According to actual product data from the Guoli Chemical database, the effective substance content (solid content) of this product is not less than 99%, and the moisture content is controlled below 0.5%. The tertiary amine content is as high as 95% or more, with extremely low acid value and iodine value (both ≤1), indicating high product purity and good color stability. Its melting point is between 30-40°C, and the flash point is above 100°C, ensuring safety during storage, transportation, and thermal processing.
Below are the detailed physicochemical technical parameters of Stearylamine Polyoxyethylene Ether AC-1812 (data source: Guoli Chemical Product Database):
| Parameter Category | Item | Specification/Typical Value |
|---|---|---|
| Basic Information | CAS Number | 26635-75-6 |
| Ionic Type | Nonionic (cationic under acidic conditions) | |
| Appearance (25°C) | Light yellow to yellow paste or viscous liquid | |
| Physicochemical Indicators | Active Substance Content (Solid Content) | ≥99% |
| Moisture | ≤0.5% | |
| pH Value (1% Aqueous Solution) | 6.0 ~ 8.0 | |
| HLB Value | Approx. 13.5 | |
| Melting Point | Approx. 30 ~ 40°C | |
| Solubility & Stability | Solubility | Easily soluble in water and organic solvents |
| Cloud Point (1% Aqueous Solution) | ≥ 90°C | |
| Chemical Stability | Stable, resistant to dilute acids and alkalis | |
| Surface & Interfacial Properties | Surface Tension (25°C) | Approx. 30-35 mN/m |
| Critical Micelle Concentration (CMC, 25°C) | Approx. 0.01-0.1 g/L | |
| Foaming Properties | Low foam | |
| Penetration Power | Moderate | |
| Hygroscopicity | Slightly hygroscopic | |
| Characteristic Values & Composition | Tertiary Amine Content | ≥ 95% |
| Amine Value | 70 ~ 85 mg KOH/g | |
| Hydroxyl Value | 65 ~ 85 mg KOH/g | |
| Acid Value | ≤ 1 mg KOH/g | |
| Iodine Value | ≤ 1 (extremely low unsaturation) | |
| Saponification Value | None | |
| Physical Parameters | Density (20°C) | Approx. 1.0 g/cm³ |
| Kinematic Viscosity (40°C) | Approx. 200-400 mm²/s (approx. 200-400 mPa·s) | |
| Refractive Index (20°C) | Approx. 1.460-1.470 | |
| Flash Point | > 100°C | |
| Safety & Packaging | Heavy Metal Content | ≤ 10 mg/kg |
| Arsenic (As) Content | ≤ 2 mg/kg | |
| Shelf Life | Two years (original sealed packaging) | |
| Conventional Packaging | 50kg plastic drum / 200kg plastic drum / IBC tote |
Based on its physicochemical properties, AC-1812 performs exceptionally well in high-temperature and high-pressure environments (e.g., polyester dyeing, cloud point >90°C). Its low-foaming characteristic is beneficial for industrial cleaning and circulating systems, while its high HLB value (approx. 13.5) makes it highly suitable as an O/W emulsifier. In pesticide formulations, textile leveling agents, and plastic antistatic treatments, the recommended dosage is typically 0.2% to 2.0% of the total formulation weight, which should be determined through compatibility tests.