OP-40 is a nonionic surfactant with high HLB value, possessing excellent emulsifying, dispersing, and detergency capabilities, widely used in textile, pesticide, emulsion polymerization, and industrial cleaning fields.
Detailed Description
OP-40 Octylphenol Polyoxyethylene Ether (CAS number: 9036-19-5) is a high-performance nonionic surfactant produced by Guoli Chemical. Its chemical name is Octylphenol Polyoxyethylene (40) Ether, with the molecular formula C8H17C6H4O(CH2CH2O)40H (i.e., C94H182O41) and a molecular weight of approximately 1968.
The product appears as a white to pale yellow paste (no fluidity at 25°C), is readily soluble in water, and exhibits excellent chemical stability, tolerating certain concentrations of acids, bases, and hard water environments. Its core characteristics include: outstanding O\/W emulsifying ability, efficiently preparing and stabilizing oil-in-water emulsions; superior dispersing and detergency, effectively dispersing, suspending, and cleaning various solid particles and oil stains; broad chemical compatibility, allowing compounding with anionic, cationic, and nonionic additives.
With its high ethylene oxide addition number (40EO), OP-40 exhibits high HLB value (17-18), high cloud point (>100°C), low foaming, and other properties, particularly suitable for leveling, dispersing, and detergency needs under high-temperature process conditions, making it a reliable general-purpose functional auxiliary in complex formulation systems.
Technical Parameters
| Parameter Item | Specification Value |
|---|
| Product Name | OP-40 Octylphenol Polyoxyethylene Ether \/ Emulsifier OP-40 |
| CAS Number | 9036-19-5 |
| Ionic Type | Nonionic |
| Appearance (25°C) | White to pale yellow paste, no fluidity |
| Active Content | ≥99% |
| HLB Value | 17-18 |
| Cloud Point (1% aqueous solution) | >100°C |
| pH Value (1% aqueous solution) | 5.0~7.0 |
| Hydroxyl Value | 27.0~31.0 mgKOH\/g |
| Density (25°C) | ~1.08 g\/cm³ |
| Melting Point | 40~50°C |
| Surface Tension (1% aqueous solution, 25°C) | 30~35 mN\/m |
| Critical Micelle Concentration (CMC) | 0.8~1.0 mmol\/L |
| Moisture Content | ≤0.5% |
| Acid Value | ≤0.5 mgKOH\/g |
| Iodine Value | ≤1 |
| Flash Point | >200°C |
| Foam Performance | Low foaming |
| Chemical Stability | Stable, stable in acid, alkali, and salt solutions |
| Heavy Metal Content | ≤10 mg\/kg |
| Arsenic Content | ≤2 mg\/kg |
| Packaging Specification | 20kg woven bag |
Application Suggestions
OP-40 is widely used in the following industrial fields:
- Textile Dyeing and Printing: As a key raw material for high-temperature leveling agents, dispersants, and detergents, it enhances dyeing uniformity and prevents dye aggregation, particularly suitable for high-temperature and high-pressure dyeing processes.
- Pesticide Formulations: As a highly effective emulsifier and synergist, it is used to prepare stable emulsifiable concentrates, emulsion concentrates, and other formulations, improving the wetting and spreading ability of the spray liquid.
- Emulsion Polymerization: As the primary emulsifier in emulsion polymerization systems such as acrylates and vinyl acetate, it imparts excellent mechanical and chemical stability to the emulsion.
- Industrial and Household Cleaning: Suitable for metalworking, hard surface cleaning, and household liquid detergent formulations, providing outstanding removal of heavy soiling and oil stains.
- Other Industrial Auxiliaries: Widely used in oilfield chemicals (emulsion viscosity reducers), leather degreasing agents, and paper deinking agents.
The recommended dosage should be adjusted according to the specific application system, typically ranging from 1% to 10% of the total formulation. In O\/W emulsion systems, low dosages can significantly reduce interfacial tension, achieving stable emulsification.
Precautions
- Hazards: Harmful if swallowed and in contact with skin (H302+H312), causes skin irritation (H315), causes serious eye damage (H318), very toxic to aquatic life with long-lasting effects (H410).
- Personal Protection: Must wear chemical safety goggles, chemically resistant protective gloves (e.g., nitrile rubber gloves), and protective clothing when handling; operate in well-ventilated areas.
- First Aid Measures: For skin contact, immediately flush with plenty of soap and water for at least 15 minutes; for eye contact, immediately rinse with flowing water or saline solution for at least 15 minutes and seek immediate medical attention; if ingested, do not induce vomiting, rinse mouth immediately and drink plenty of water, and seek medical attention promptly.
- Storage Conditions: Store in a cool, dry, well-ventilated warehouse, with temperature recommended between 5°C and 30°C, keep containers tightly closed, away from heat and ignition sources, and store separately from oxidizing agents, strong acids, strong bases, and food.
- Environmental Protection: Do not discharge directly into water bodies, soil, or drainage systems without treatment; waste must be disposed of by qualified professional agencies.
