Stearylamine Polyoxyethylene Ether AC-1830 (CAS No.: 26635-75-6) is a high molecular weight nonionic surfactant obtained by adding 30 ethylene oxide (EO) units to stearylamine as the starting agent, with an average molecular weight of approximately 1590. The polyoxyethylene chain segment in its molecular structure imparts good water solubility and surface activity, while the tertiary amine group provides weak cationic characteristics, resulting in unique adsorption behavior at interfaces. At room temperature, the product is a light yellow to yellow paste with a freezing point of approximately 20-30°C. Its fluidity significantly increases when the temperature rises above 40°C.
The most prominent technical feature of this product is its high HLB value (16~17), which determines its excellent emulsifying capability in oil-in-water (O\/W) systems. Meanwhile, the cloud point exceeds 100°C (1% aqueous solution), indicating that the hydrogen bonding between its nonionic chain segments and water molecules is extremely stable in atmospheric water-phase systems, making it suitable for high-temperature operating environments. The product's surface tension is approximately 32 mN\/m (1% aqueous solution, 25°C), and the critical micelle concentration (CMC) is between 0.02-0.05 g\/L, demonstrating its ability to effectively reduce interfacial tension at very low concentrations.
From chemical indicators, the solid content is ≥99%, water content ≤1.0%, and the active ingredient is extremely high. Both amine value and hydroxyl value are controlled within the range of 35~45 mg KOH\/g. The tertiary amine content is ≥95%, free alcohol content ≤1%, indicating a clear chemical structure with minimal by-products. Iodine value ≤1 and unsaturation ≤0.04 mol\/kg confirm high saturation of the fatty chain and good oxidation resistance. Acid value ≤1 mg KOH\/g and saponification value ≤2 mg KOH\/g indicate stable chemical properties, making the product resistant to hydrolysis or rancidity.
| Parameter Category | Parameter Name | Typical Value\/Indicator |
|---|---|---|
| Basic Information | Chemical Name | Stearylamine Polyoxyethylene Ether (30EO) |
| CAS Number | 26635-75-6 | |
| Molecular Formula | C18H39N·(C2H4O)30 or C78H159NO30 (average) | |
| Average Molecular Weight | ~1590 | |
| Ionic Type | Nonionic (with weak cationic characteristics) | |
| Appearance (25°C) | Light yellow to yellow paste | |
| Surface and Interfacial Properties | HLB Value | 16~17 |
| Cloud Point (1% Aqueous Solution) | >100°C | |
| Surface Tension (1% Aqueous Solution, 25°C) | Approximately 32 mN\/m | |
| Critical Micelle Concentration (CMC, 25°C) | 0.02-0.05 g\/L | |
| Chemical Property Indicators | Amine Value | 35~45 mg KOH\/g |
| Hydroxyl Value | Approximately 35~45 mg KOH\/g | |
| Tertiary Amine Content | ≥95% | |
| Acid Value | ≤1 mg KOH\/g | |
| Saponification Value | ≤2 mg KOH\/g | |
| Iodine Value | ≤1 | |
| Physical Properties | Freezing Point | Approximately 20-30°C |
| Density (25°C) | Approximately 1.0 g\/cm³ | |
| Kinematic Viscosity (40°C) | Approximately 150 mm²\/s | |
| Low Shear Viscosity (25°C) | Approximately 300 mPa·s | |
| Refractive Index (40°C) | Approximately 1.465 | |
| Flash Point (Closed Cup) | >200°C | |
| Composition and Stability | Solid Content | ≥99% |
| Water Content | ≤1.0% | |
| pH Value (1% Aqueous Solution) | 6.0~8.0 | |
| pH Value (5% Aqueous Solution) | 6.0~8.0 | |
| Chemical Stability | Stable at room temperature; avoid prolonged contact with strong oxidizers | |
| Functional Indicators | Foam Characteristics | Low foam |
| Solubility | Easily soluble in water and organic solvents | |
| Unsaturation | ≤0.04 mol\/kg | |
| Safety and Quality | Heavy Metal Content | ≤10 mg\/kg |
| Arsenic Content | ≤2 mg\/kg |
Data Source: Guoli Chemical Product Database
Based on the above technical parameters, the recommended usage of AC-1830 in different fields is as follows: As a textile leveling agent, the recommended dosage is 0.5~2.0 g\/L (based on dye bath volume), leveraging its high cloud point advantage to maintain stable dispersion under high temperature and high pressure dyeing conditions. When used in pesticide emulsifier formulations, 3%~8% of the product can be directly added to the oil phase to obtain a stable oil-in-water emulsion using the HLB value of 16~17. In metalworking fluids as a lubrication\/corrosion inhibition component, the recommended addition amount is 5%~15%, which can produce a synergistic effect when compounded with anionic rust inhibitors. In household laundry detergents or fabric softeners, it is recommended to add 1%~5%, utilizing its weak cationic characteristics to achieve fiber adsorption and softening effects.