Octadecyl polyoxyethylene ether AC-1830 (CAS number: 26635-75-6) is a nonionic surfactant produced by the addition polymerization of natural fatty amine—octadecylamine (also known as stearylamine) as the initiator with ethylene oxide (EO). Its average molecular formula can be expressed as C18H39N·(C2H4O)30 (or C78H159NO30), with an average molecular weight of approximately 1590. The tertiary amine content in the product is as high as ≥95%, reflecting its high purity structural characteristics.
From the chemical structure, the product molecule consists of two parts: the long-chain octadecyl group (C18) forms the hydrophobic tail, providing affinity for oils and non-polar substances; the polyoxyethylene chain segment (average 30 EO units) forms the hydrophilic head, endowing the product with excellent water solubility and interfacial activity. This unique "hydrophobic-hydrophilic" block structure gives it dual characteristics of nonionic and weakly cationic—it is mainly nonionic under neutral and alkaline conditions, while under acidic conditions the nitrogen atom can be protonated to exhibit weakly cationic features, thus having good adsorption capacity on negatively charged solid surfaces (such as fibers and metals).
The product appears as a light yellow to yellow paste or solid (melting point approximately 20-30°C), easily soluble in water and organic solvents, with an HLB value of approximately 16~17, cloud point >100°C (1% aqueous solution), belonging to typical hydrophilic nonionic surfactants.
| Parameter | Technical index |
|---|---|
| Chemical name | Polyoxyethylene (30) octadecylamine / N-octadecyl polyoxyethylene amine |
| CAS number | 26635-75-6 |
| Average molecular formula | C18H39N·(C2H4O)30 |
| Average molecular weight | ~1590 |
| Active content | ≥99% |
| Tertiary amine content | ≥95% |
| Ionic nature | Nonionic (weakly cationic) |
| HLB value | 16~17 |
| Amine value | 35~45 mg KOH/g |
| Hydroxyl value | Approximately 35~45 mg KOH/g |
| Cloud point (1% aqueous solution) | >100°C |
| pH value (1% aqueous solution) | 6.0~8.0 |
Based on the characteristics of its main components, AC-1830 is widely used in the following fields:
This product has an active content ≥99%, belonging to high purity surfactant. It is recommended to wear protective gloves and goggles during operation, avoid direct contact with eyes and skin. Store in a cool, dry, well-ventilated place, with storage temperature recommended ≤40°C, avoid freezing and high temperature environments. Keep away from strong oxidizers and fire sources. The above technical parameters are from the measured data of the Guoli Chemical product database.