The detailed physicochemical technical parameters of OP-40 Octylphenol Polyoxyethylene Ether (CAS: 9036-19-5) are summarized as follows, with data derived from the Guoli Chemical Product Database, categorized into basic physicochemical indicators and special surface activity indicators.
| Parameter Name | Technical Indicator |
|---|---|
| Product Full Name | Octylphenol Polyoxyethylene (40) Ether |
| Appearance (25℃) | White to light yellow paste, non-flowable |
| Ionic Type | Nonionic |
| Molecular Formula | C94H182O41 |
| Molecular Weight | ~1968 |
| Active Content | ≥99% |
| Water Content | ≤0.5% |
| pH Value (1% and 5% Aqueous Solution) | 5.0 ~ 7.0 |
| Density (25℃) | ~1.08 g\/cm³ |
| Kinematic Viscosity (25℃, paste) | ~2000 mm²\/s |
| Low Shear Viscosity (25℃) | ~5000 mPa·s |
| Melting Point | 40 ~ 50℃ |
| Refractive Index (20℃) | 1.48 ~ 1.49 |
| Flash Point | >200℃ |
| Hygroscopicity | Slightly hygroscopic |
| Solubility | Easily soluble in water |
| Chemical Stability | Stable in acid, alkali, and salt solutions |
| Heavy Metals | ≤10 mg\/kg |
| Arsenic | ≤2 mg\/kg |
| Parameter Name | Technical Indicator |
|---|---|
| HLB Value | 17 ~ 18 |
| Cloud Point (1% Aqueous Solution) | >100℃ |
| Hydroxyl Value | 27.0 ~ 31.0 mgKOH\/g |
| Acid Value | ≤0.5 mgKOH\/g |
| Amine Value | ≤0.5 mgKOH\/g |
| Iodine Value | ≤1 gI2\/100g |
| Saponification Value | ≈0 |
| Surface Tension (1% Aqueous Solution, 25℃) | 30 ~ 35 mN\/m |
| Critical Micelle Concentration (CMC) | 0.8 ~ 1.0 mmol\/L |
| Foam Characteristics | Low foaming |
| Alkali Resistance | Alkali-resistant, stable in concentrated alkali |
| Free Alcohol Content | ≤0.5% |
| Unsaturation | None |
| Penetration Power | No standard test data available |
The extremely high HLB value (17-18) endows OP-40 with excellent water solubility and O\/W emulsifying ability. Its cloud point exceeds 100℃, making it particularly suitable for high-temperature emulsion polymerization and high-temperature leveling processes in textile dyeing and printing. Additionally, its low foaming characteristics make it an ideal component for industrial circulating water cleaning and metalworking fluids.