Nonyl Phenol Ethoxylates – Physical & Chemical Properties

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Nonyl phenol ethoxylates (NPEs) are a group of synthetic surfactants widely used in industrial and household cleaning products due to their excellent detergent and emulsifying properties. These compounds consist of nonylphenol molecules bonded to ethylene oxide chains, which can vary in length, leading to diverse physical and chemical characteristics. Understanding the specific properties of NPEs is crucial for their safe and effective application across various sectors.


Property Status
Appearance Clear liquid
Odor Phenol-like
pH 6 to 7
Concentration 10 g/l
Melting point 5 °C
Pour point 6 °C
Freezing point 5 °C
Boiling point > 200 °C
Flash point 237 °C
Flash point method Open cup
Relative density 1.06
Density 1.06 g/cm³ (25 °C)
Water solubility Soluble
Solubility in other solvents Solvent: Methanol – Soluble
Autoignition temperature 425 °C
Viscosity, dynamic 330 mPa.s (20 °C)


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