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Lauryl Alcohol Ethoxylate (AEO), also known as Fatty Alcohol Ethoxylate or Alcohol Ethoxylate (CAS No. 9002-92-0), is a nonionic surfactant produced by ethoxylating fatty alcohols with ethylene oxide. The number after AEO indicates the average number of ethylene oxide units — and this number has a direct effect on how the surfactant behaves in a formulation.
Customers often hesitate between AEO-3, AEO-7 and AEO-9 because each grade has a different balance of HLB value, solubility and application performance. The choice is not simply about which one is “better.” Selecting the wrong grade may affect cleaning efficiency, foam behavior, cloud point and compatibility with other ingredients in the system.
To make the comparison clearer, Dotachem has summarized the main differences between these three grades and the applications where each one is more commonly used.
Understanding AEO Grades Through HLB
HLB helps explain why AEO grades behave differently in oil- and water-based systems. As the EO number changes, the balance between oil affinity and water compatibility changes with it.
Grades with fewer EO units, such as AEO-3, stay closer to the oil phase and are more often used for emulsification. AEO-7 sits nearer the middle, while AEO-9 is more hydrophilic and easier to use in water-based cleaning systems.
This HLB difference is what drives the application split between these three grades.
When AEO-3 Makes More Sense
Among these three grades, AEO-3 is the most oil-oriented. Its lower HLB makes it a better fit when the main job is emulsification rather than cleaning.
It is often discussed for agricultural emulsifiable concentrates, metalworking fluids and other systems containing mineral oil or synthetic oil. In these applications, the surfactant needs to help the oil phase disperse after water is added, without making the system excessively foamy or overly water-soluble.
AEO-3 is therefore usually evaluated together with the oil type, emulsifier package and required emulsion stability. The grade name alone is not enough to predict how the finished system will behave.
Where AEO-7 Is Commonly Used
AEO-7 offers a more even balance between wetting, emulsification and detergency. This makes it useful in industrial cleaning and textile processing, especially where the system needs effective wetting but should not generate too much foam.
Common examples include hard-surface and equipment cleaners, textile scouring auxiliaries, spray-cleaning products and some CIP systems. In these cases, customers tend to look at wetting speed, oil removal, foam level and performance at the actual working temperature.
AEO-7 is also considered in some NPE replacement projects. A similar HLB range can make it a useful starting point, although cloud point and emulsification performance still need to be checked in the customer’s own system.
AEO-9: When Better Water Compatibility Is Needed
AEO-9 is more hydrophilic than AEO-3 and AEO-7, so it is more commonly selected for water-based detergent and cleaning products.
It can be used in laundry detergents, general-purpose cleaners, industrial washing products and emulsion polymerization. Better water compatibility may improve dispersion and product clarity, particularly when the material needs to perform at different dilution levels.
For many water-based systems, AEO-9 is a practical grade to test first. The final choice may still change after checking foam, viscosity, cloud point and compatibility with the other surfactants in the formulation.
Key Indicators to Confirm Before Sourcing
When sourcing AEO grades, buyers typically confirm:
For customers switching from NPE to AEO grades, it is also worth testing cloud point and emulsification performance in the actual formulation before committing to bulk orders, since AEO and NPE do not always perform identically at equivalent HLB values.
Sourcing AEO from Dotachem
Dotachem supplies Lauryl Alcohol Ethoxylate grades from AEO-1 to AEO-9 for industrial cleaning, textile, agricultural and metalworking applications. The series features controlled color, low moisture content and a stable pH range of 6.0–7.0, with hydroxyl values matched to different EO grades.
Products are REACH compliant and supplied with COA, TDS and SDS. Free samples are available for grade evaluation before bulk purchase.
For customers comparing Nonylphenol Ethoxylate (NPE) and AEO grades, Dotachem can support product selection, grade matching and sample arrangement based on HLB requirements, application conditions and target market needs.
As a one-stop chemical raw material supplier in China, Dotachem also provides related surfactants and polyether materials, including Alkyl Polyglucoside (APG), Polyethylene Glycol (PEG), Polypropylene Glycol (PPG) and Octylphenol Ethoxylate (OPE). These products support different needs in cleaning, emulsification, wetting and industrial processing, giving customers more options for product selection and combined sourcing.
Contact Dotachem for product specifications, samples and sourcing support from China.
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