OPE-108 (CAS number: 121809-82-3) has the chemical name octylphenol polyoxyethylene ether, molecular formula C8H17C6H4O(CH2CH2O)nH (where n≈8-10), and molecular weight approximately 646. The product appears as a colorless to light yellow transparent liquid, belonging to the nonionic surfactant type, with active matter content ≥99%, easily soluble in water and organic solvents, chemically stable at room temperature, resistant to acid, alkali, and hard water, with strong compatibility.
It exhibits high surface activity in water, with a surface tension of only 29~30 mN\/m for a 1% aqueous solution, a critical micelle concentration (CMC) as low as 0.26 mmol\/L, a cloud point of 61~67°C, excellent penetrating power (standard canvas method ≤60 seconds), and moderate foamability, making it a low-foaming product. These comprehensive properties make it perform excellently in fields such as coatings, inks, plastics, adhesives, and composite materials.
| Parameter Item | Indicator \/ Value | Test Condition |
|---|---|---|
| CAS Number | 121809-82-3 | — |
| Appearance | Colorless to light yellow transparent liquid | Visual |
| Ionic Type | Nonionic | — |
| pH Value | 6.0~8.0 | 1% aqueous solution \/ 5% aqueous solution |
| Active Matter Content | ≥99% | — |
| Water Content | ≤0.5% | — |
| HLB Value | 13.5 | — |
| Density | 1.06 g\/cm³ | 20°C (Data source: Guoli Chemical) |
| Kinematic Viscosity | 250 mm²\/s | 25°C (Data source: Guoli Chemical) |
| Refractive Index | 1.49 | 20°C (Data source: Guoli Chemical) |
| Flash Point | >150°C (Closed Cup) | — |
| Pour Point | <-5°C | — |
| Cloud Point | 61~67°C | 1% aqueous solution |
| Surface Tension | 29~30 mN\/m | 25°C, 1% aqueous solution |
| Critical Micelle Concentration (CMC) | 0.26 mmol\/L | 25°C (Data source: Guoli Chemical) |
| Hydroxyl Value | 85~90 mgKOH\/g | — |
| Acid Value | ≤0.5 mgKOH\/g | — |
| Saponification Value | ≤2 mgKOH\/g | — |
| Iodine Value | ≤1 gI₂\/100g | — |
| Foamability | Initial approximately 110mm \/ after 5min approximately 85mm | 0.25%, 25°C, Ross-Miles method |
| Penetrating Power | ≤60 seconds | 0.5% solution, standard canvas method |
| Free Alcohol | ≤1% | — |
| Heavy Metals (as Pb) | ≤20 mg\/kg | — |
| Arsenic (As) | ≤2 mg\/kg | — |
Due to OPE-108's excellent emulsifying, wetting, and dispersing capabilities, as well as its resistance to acid, alkali, and hard water, it is recommended for use in the following scenarios: (1) As an efficient wetting and dispersing agent for water-based coatings and printing inks, significantly improving pigment dispersion and film leveling; (2) In the processing of PVC, polyolefins, and other plastics, as an internal lubricant and mold release agent to reduce melt viscosity; (3) In adhesive and hot melt adhesive systems, to adjust open time and interfacial wettability. It is recommended to determine the optimal addition amount through experiments based on the specific formulation, with a reference range of 0.1%~1.0% of the total system weight.