OP-7 Octylphenol Ethoxylate (English name: Octylphenol ethoxylate (7 EO), also known as emulsifier OP-7, Triton X-114, Igepal CA-620) is a nonionic surfactant belonging to the alkylphenol ethoxylate family. Its molecular formula is C28H50O8, with a molecular weight of approximately 514 g/mol, and a CAS number of 9036-19-5. The product appears as a colorless to light yellow transparent oily liquid with high surface activity.
Due to its unique molecular structure, this product exhibits excellent overall performance: the hydrophilic-lipophilic balance (HLB) value is 11.7, the cloud point range is 25~35°C, and it is transparent at room temperature, making it easy to formulate and use. Its critical micelle concentration (CMC) is about 0.2 mmol/L (25°C), and the surface tension is about 30 mN/m (0.1% aqueous solution), allowing it to rapidly reduce surface tension and provide efficient wetting and penetration effects. Additionally, the product exhibits outstanding chemical stability against acids, alkalis, and hard water ions, maintaining activity in complex chemical environments.
OP-7 is produced by Guoli Chemical, with an active ingredient content of ≥99%. It integrates functions such as emulsification, wetting, dispersion, and cleaning, allowing a single component to meet various process requirements. The pH value (1% aqueous solution) of the product is between 5.0 and 7.0, making it mild in nature and compatible with various additives. It can be widely used in industrial cleaning, textiles, pesticides, metal processing, papermaking, and leather industries.
| Parameter Name | Value/Description |
|---|---|
| Product Name | OP-7 Octylphenol Ethoxylate |
| Chemical Category | Nonionic Surfactant (Alkylphenol Ethoxylate) |
| CAS Number | 9036-19-5 |
| Molecular Formula | C28H50O8 |
| Molecular Weight | Approximately 514 g/mol |
| Appearance | Colorless to light yellow transparent oily liquid |
| Ionic Type | Nonionic |
| HLB Value | 11.7 |
| Cloud Point | 25~35°C |
| Active Ingredient Content | ≥99% |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| pH Value (5% Aqueous Solution) | 5.0~7.0 |
| Density (25°C) | 1.05~1.07 g/cm³ |
| Refractive Index (20°C) | 1.485~1.490 |
| Surface Tension (0.1% Aqueous Solution, 25°C) | Approximately 30 mN/m |
| Critical Micelle Concentration CMC (25°C) | Approximately 0.2 mmol/L |
| Flash Point (Closed Cup) | Approximately 230°C |
| Kinematic Viscosity (25°C) | Approximately 250 mm²/s |
| Hydroxyl Value | Approximately 109 mg KOH/g |
| Acid Value | ≤1 mg KOH/g |
| Saponification Value | ≤1 mg KOH/g |
| Iodine Value | ≤1 |
| Moisture Content | ≤1.0% |
| Free Alcohol | ≤1% |
| Melting Point | <-10°C |
| Foaming Characteristics | Low Foaming |
| Alkali Resistance | Alkali Resistant |
| Solubility | Easily soluble in oil and water |
| Heavy Metals | ≤10 mg/kg |
| Arsenic | ≤2 mg/kg |
| Packaging Specifications | 50kg Plastic Drum / 200kg Plastic Drum / IBC Tote |
| Shelf Life | Two years (stored in original sealed packaging, cool and dry place) |
Industrial and Household Liquid Detergents: As an efficient wetting, penetrating, and emulsifying component, it is recommended for use in formulations such as dishwashing detergents and hard surface cleaners, significantly enhancing oil removal capabilities.
Textile Industry Pretreatment: Used as a scouring agent and degreaser in desizing, scouring, and bleaching processes of gray fabrics, and also as a leveling agent to ensure uniform dyeing.
Pesticide Formulations: Used as an emulsifier in oil-in-water emulsions, microemulsions, and emulsifiable concentrate formulations. The HLB value of 11.7 provides excellent emulsification and dispersion effects for various pesticide active ingredients, improving the spreadability of the spray solution on crop surfaces.
Emulsion Polymerization: Used as an emulsifier or surfactant in emulsion polymerization systems such as acrylates, styrene-acrylic, and vinyl acetate-acrylic copolymers.