In comparison with other AEO series products, the greatest advantage of MOA-9 (with an ethylene oxide adduct number of approximately 9) lies in its achievement of a "golden balance point" in application performance. Products with a low EO adduct number (e.g., AEO-3, i.e., MOA-3B) are too lipophilic, almost insoluble in water, and are mainly used as water-in-oil (W/O) emulsifiers or intermediates for the preparation of anionic surfactants (e.g., AES), with limited direct effectiveness as detergents or leveling agents. Products with a high EO adduct number (e.g., AEO-15, AEO-23), although highly water-soluble and with higher cloud points, have reduced emulsifying and degreasing capability toward oils as the EO chain lengthens, and may produce more stable foam that is harder to rinse.
MOA-9 precisely balances the hydrophobic carbon chain and the hydrophilic oxyethylene chain in the molecule. This gives it a strong affinity and stripping power for oils and fats, while also providing good water solubility, allowing it to disperse quickly in water and form stable emulsions. It can offer the excellent wetting and penetrating properties of high-EO products, while efficiently emulsifying mineral oils and animal and vegetable oils like low-EO products. This "multi-functional single agent" property enables it to independently play a core role in demanding scenarios such as textile leveling, industrial degreasing, and hard surface cleaning, without the need for complex blending.
In addition, compared to ionic or other nonionic surfactants (e.g., alkylphenol polyoxyethylene ether TX/NP series), MOA-9 offers better ecological safety, mildness to the skin, and broader chemical compatibility. It is resistant to acids, alkalis, and hard water, and can be freely compounded with cationic and anionic surfactants, providing great convenience for formulation engineers and significantly reducing the amount of adjusting agents needed in formulations.
The following table shows the key differences among some similar products in the AEO series, illustrating why MOA-9's comprehensive balanced performance is more outstanding:
| Product Model | Typical EO Adduct Number | Appearance (25°C) | Water Solubility & Tendency | Core Function Focus |
|---|---|---|---|---|
| MOA-3B (AEO-3) | ≈3 | Colorless to slightly yellow transparent liquid | Insoluble in water (lipophilic) | W/O emulsification, preparation of AES intermediate |
| MOA-9 (AEO-9) | ≈9 | Colorless transparent liquid to white paste | Easily dispersible/soluble in water (balanced hydrophilic-lipophilic) | Efficient O/W emulsification, penetration, leveling, detergency (all-round) |
| OS-15 (AEO-15) | ≈15 | White to slightly yellow paste | Easily soluble in water (more hydrophilic) | High-temperature leveling, strong wetting, dispersing |
| MOA-23 (AEO-23) | ≈23 | White to slightly yellow waxy solid | Very easily soluble in water (extremely hydrophilic) | Emulsification and solubilization, stability in high electrolyte systems |
Note: The above data are based on the product library of Guoli Chemical and the general characteristics of typical fatty alcohol polyoxyethylene ethers in the industry.
If your application scenario requires simultaneous strong oil removal, fabric leveling, and good compatibility with a variety of active ingredients, MOA-9 is undoubtedly the best choice.