Octylphenol Ethoxylates

Octylphenol Ethoxylates (CAS Number: 27193-28-8) are nonionic surfactants formed by the reaction of octylphenol with ethylene oxide, producing a series of ethoxylated derivatives with varying chain lengths. The degree of ethoxylation determines their physical and chemical characteristics. These products range in appearance from clear to slightly hazy, colorless liquids to waxy white solids. Lower-mole ethoxylates (up to 6 moles of ethylene oxide) are typically water-dispersible, while higher-mole ethoxylates (7 moles and above) exhibit full water solubility and are also soluble in many polar solvents.

As the length of the ethylene oxide chain increases, several key properties change systematically. Higher ethoxylation leads to an increase in hydrophilic-lipophilic balance (HLB), enhancing water solubility and making the material more suitable for oil-in-water emulsions. Additionally, properties such as pour point, cloud point, density, viscosity, and flash point generally rise with increasing ethylene oxide content. This tunable balance between hydrophobic and hydrophilic segments allows formulators to select specific grades tailored to performance requirements in different environments.

Octylphenol Ethoxylates are widely utilized as emulsifiers and wetting agents across numerous industries. In industrial and institutional cleaning formulations, they assist in removing oils, greases, and particulate soils by reducing surface and interfacial tension. In agricultural applications, they function as adjuvants, improving the spreading and penetration of crop protection products on plant surfaces. They are also employed in textile and leather processing, where they support scouring, dyeing, and finishing operations by enhancing wetting and detergency performance.

Beyond these uses, Octylphenol Ethoxylates serve as intermediates in the manufacture of ether sulfates and ether carboxylates, expanding their versatility in surfactant chemistry. They are also used in selected cosmetic and personal care formulations, as well as in other industrial and agricultural systems. Furthermore, they can be converted into phosphate esters, which act as effective dispersants, low-foam emulsifiers, and antistatic agents. This broad functional profile makes Octylphenol Ethoxylates valuable building blocks in both formulated products and downstream chemical synthesis.