OP-7 (Octylphenol Polyoxyethylene (7) Ether) has become an irreplaceable key auxiliary in multi-industry formulations due to its moderate HLB value and excellent surface activity. The hydrophobic octylphenol group in its molecular structure forms a good balance with the hydrophilic group of 7 EO chains, enabling outstanding directional adsorption at the oil/water interface, thus achieving efficient emulsification and dispersion.
This product exhibits outstanding chemical stability against acids, alkalis, and hard water ions, maintaining activity in complex industrial environments and offering broad formulation adaptability. Meanwhile, its cloud point characteristic keeps the product transparent at room temperature, facilitating easy blending and use, with excellent penetrability and detergency. A single component can meet multiple process requirements, effectively simplifying formulation design.
According to data from Guoli Chemical, the main applications of OP-7 cover six industry sectors, each serving different functional roles. The following is a detailed explanation.
| Industry | Specific Process/Application | Functional Role |
|---|---|---|
| Industrial and Household Liquid Cleaning | Dishwashing detergents, hard surface cleaners, fabric liquid detergents | Efficient wetting agent, penetrant, and emulsifier, enhancing oil stain removal capability |
| Textile Industry | Desizing, scouring, bleaching pretreatment processes; level dyeing | Detergent, degreasing agent, leveling agent, ensuring dyeing uniformity |
| Pesticide Formulations | Emulsion in water (EW), microemulsion (ME), emulsifiable concentrate (EC) formulations | Emulsifier, promoting stable dispersion of pesticide active ingredients in water or solvents, improving spray adherence |
| Emulsion Polymerization | Acrylate, styrene-acrylic, vinyl acetate-acrylic synthetic emulsion polymerization systems | Monomer emulsifier and stabilizer, controlling latex particle size, ensuring stable polymerization process |
| Metal Surface Treatment and Processing | Acidic/alkaline cleaning systems, ultrasonic/spray cleaning, cutting fluids, grinding fluids, forming lubricants | Cleaning degreasing agent (quickly wetting metal surfaces, removing processing oils and rust preventives); processing fluid additive (emulsification and dispersion, enhancing cooling and compatibility with extreme pressure additives) |
| Paper and Leather Industry | Pulping and papermaking cooking penetration, resin removal; leather soaking, degreasing processes | Degreasing agent and wetting auxiliary, accelerating liquid penetration, promoting removal of fatty substances, improving treatment uniformity |
| Parameter | Specification |
|---|---|
| Product Name | OP-7 Octylphenol Polyoxyethylene Ether |
| CAS Number | 9036-19-5 |
| Chemical Type | Nonionic Surfactant (Alkylphenol Polyoxyethylene Ether) |
| Appearance | Colorless to light yellow transparent oily liquid (room temperature); may be pasty at low temperature |
| pH Value (1% Aqueous Solution) | 5.5 – 7.5 |
| Flash Point | >150°C (closed cup), not classified as flammable |
| Water Solubility | Dispersible and emulsifiable in water; complete dissolution depends on concentration and temperature |
| Shelf Life | Two years (in original sealed container, cool, dry, and ventilated place) |
| Recommended Storage Temperature | 5°C – 35°C |
Usage Method: OP-7 can be directly added to the aqueous or oil phase with stirring for dispersion, or compounded with anionic, cationic, and amphoteric surfactants for synergistic effects. In emulsion polymerization, it is recommended to be added as a monomer emulsifier during the pre-emulsification stage; in metal cleaning formulations, combining with alkaline aids (such as sodium carbonate, sodium metasilicate) can significantly enhance degreasing efficiency.
Compatibility Recommendations: This product has excellent chemical compatibility and can be compounded with various industrial auxiliaries. In pesticide formulations, it is often used in combination with nonionic/anionic emulsifier systems; in textile pretreatment, it can be combined with penetrants, chelating agents, alkali agents, etc., to form a composite working solution.