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) |
