OP-7 octylphenol ethoxylate (CAS number: 9036-19-5) has an HLB value of 11.7, making it a nonionic surfactant with a moderate hydrophilic-lipophilic balance. Its cloud point ranges from 25~35°C. At room temperature, it can be dispersed and emulsified in water, with the degree of complete dissolution depending on concentration and temperature. At room temperature, the product is a viscous liquid and is recommended to be used in environments above 15°C. If the product becomes cloudy or solidifies at low temperatures, it can slowly recover at room temperature without affecting its performance.
According to the Guoli Chemical product database, OP-7 is suitable for various industrial formulation systems. This product can be compounded with anionic, cationic, and other nonionic surfactants, demonstrating outstanding stability against acids, alkalis, and hard water ions, maintaining activity in complex chemical environments. When preparing the actual solution, it is recommended to pre-mix OP-7 with the oil phase components of the formulation, then gradually add the water phase, or directly disperse it into water under stirring.
| Parameter Item | Value | Remarks |
|---|---|---|
| HLB Value | 11.7 | Hydrophilic-lipophilic balance value |
| Cloud Point | 25~35°C | Key parameter affecting dissolution state |
| Appearance | Colorless to light yellow liquid | May appear paste-like depending on temperature |
| Active Content | ≥99% | High-purity product |
| pH Value (1% aqueous solution) | 5.0~7.0 | Weakly acidic to neutral |
| Density (25°C) | 1.05~1.07 g/cm³ | — |
| Surface Tension (0.1% aqueous solution, 25°C) | Approximately 30 mN/m | Indicates excellent wetting and penetration ability |
| Critical Micelle Concentration (CMC, 25°C) | Approximately 0.2 mmol/L | Surfactant activity can be achieved at low concentrations |
| Flash Point (Closed Cup) | Approximately 230°C | Not classified as flammable |
| Foam Performance | Low foaming | Suitable for spray cleaning systems |
| Alkali Resistance | Alkali resistant | Suitable for alkaline cleaning formulations |
Industrial and household liquid detergents: Used as a wetting, penetrating, and emulsifying component to enhance the formulation's ability to remove oily soils. Typically compounded with anionic surfactants (e.g., LAS, AES), with OP-7 added as a nonionic auxiliary.
Textile pretreatment: Provides washing and degreasing effects during desizing, scouring, and bleaching processes, while acting as a leveling agent to ensure dyeing uniformity. Can be used in alkaline baths, leveraging its alkali resistance.
Pesticide emulsifiers: Used in formulations of water emulsions, microemulsions, and emulsifiable concentrates to promote stable dispersion of active pesticide ingredients. It is recommended to compound with anionic emulsifiers (e.g., pesticide emulsifier 500#) for optimal emulsification results.
Emulsion polymerization: Serves as a monomer emulsifier and stabilizer in systems such as acrylate, styrene-acrylic, and vinyl acetate-acrylic, controlling latex particle size. Can be used alone or in synergy with anionic emulsifiers.
Metal cleaning and degreasing: Quickly wets metal surfaces in acidic or alkaline cleaning systems, effectively removing processing oils and anti-rust greases. Works best with ultrasonic cleaning, and its low-foaming property is particularly suitable for spray cleaning processes.
Metalworking fluids: Acts as an emulsifier and dispersant in cutting fluids and grinding fluids, improving cooling performance and compatibility with extreme pressure additives.
Paper and leather industries: Accelerates the penetration of cooking liquor, promoting the removal of resins and oils; used in soaking and degreasing processes in leather processing.
Regarding specific recommended dosages: The Guoli Chemical database does not provide specific dosage parameters for each application field. In practical use, the addition amount of OP-7 is generally determined based on formulation objectives and process conditions, typically ranging from 0.1% to 5% of the total formulation. It is recommended that users verify the optimal dosage through small-scale experiments or contact the Guoli Chemical technical team for formulation support tailored to specific application scenarios.