According to the Guoli Chemical product database, the CAS number of octadecylamine polyoxyethylene ether AC-1815 is 26635-75-6, the molecular formula is C48H99NO15 (average EO=15), and the molecular weight is approximately 930. The product appears as a white to light yellow waxy solid or paste. Its chemical structure consists of three parts: a lipophilic long-chain alkyl group (from octadecylamine/stearylamine), a central amine nitrogen atom, and a hydrophilic polyoxyethylene chain (composed of 15 ethylene oxide units). This unique molecular design gives it both the cationic characteristics of an amine group and the nonionic nature of an ether chain.
Notably, this product has an extremely high active content, with active content ≥99%, tertiary amine content ≥95%, and very low residual free alcohol (≤1.0%). It exhibits nonionic properties under neutral or alkaline conditions, while in acidic conditions, the amine group becomes protonated and transforms into a cationic form. This chemical structure endows it with super emulsifying and dispersing capabilities, excellent acid, alkali and hard water resistance, and good antistatic effects.
In terms of purity, the product has an acid value ≤1.0 mgKOH/g and an iodine value ≤2.0 gI2/100g (unsaturation ≈0), indicating that the raw material octadecylamine has been fully hydrogenated and saturated, resulting in stable chemical properties that are not easily oxidized or discolored. The product melting point is approximately 30~40°C, it is easily soluble in water and various organic solvents, with an HLB value of 14-15, leaning towards the hydrophilic side, making it suitable as a primary emulsifier for oil-in-water (O/W) emulsion systems.
| Parameter Name | Specification Standard | Parameter Name | Specification Standard |
|---|---|---|---|
| Chemical Name | Octadecylamine Polyoxyethylene (15) Ether | CAS Number | 26635-75-6 |
| Active Content | ≥99% | Tertiary Amine Content | ≥95% |
| Amine Value | 60~75 mgKOH/g | Hydroxyl Value | 60~75 mgKOH/g |
| HLB Value | 14~15 | Free Alcohol | ≤1.0% |
| pH Value (1% Aqueous Solution) | 6.0~8.0 | Moisture Content | ≤0.5% |
| Cloud Point (1% Aqueous Solution) | ≥90℃ | Melting Point Range | 30~40℃ |
| Iodine Value | ≤2.0 gI2/100g | Molecular Weight | Approx. 930 |
* The above data are all from actual measured parameters in the Guoli Chemical product database.
Since the main component of AC-1815 is high-purity octadecylamine polyoxyethylene (15) ether, the synergistic effect of the amine group and ether chain in its molecule gives it unique application advantages in the following fields:
To determine whether the AC-1815 component meets standards, focus on testing its amine value (60-75 mgKOH/g) and tertiary amine content (≥95%). The amine value is a key indicator reflecting the active content and molecular weight distribution. If the amine value is low, it may indicate high levels of free polyethylene glycol or moisture, indicating insufficient product purity. Additionally, the cloud point of a 1% aqueous solution should be ≥90℃. If the cloud point is significantly lower, it suggests insufficient EO addition number or excessive impurity content.