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OP-21
Jienuo
Product Advantage
Superior Emulsifying Efficiency: OP-21 exhibits strong emulsifying power, reducing oil-water interfacial tension by over 35% compared to common emulsifiers. It forms stable emulsions that remain uniform for 6+ months without stratification, ensuring long-term product stability for paints, pesticides, and lubricants.
Broad Compatibility: It works seamlessly with anionic (e.g., sodium lauryl sulfate) and cationic (e.g., cetyltrimethylammonium chloride) surfactants, with no precipitation or performance loss. This flexibility allows it to be integrated into 90% of industrial surfactant formulations.
Excellent Thermal & Chemical Stability: OP-21 maintains stable performance in temperatures ranging from 40°C to 80°C and resists degradation in acidic (pH 4-6) and alkaline (pH 8-10) environments. This makes it suitable for high-temperature processes like metal cleaning and textile dyeing.
High Purity & Consistent Quality: Our OP-21 has a minimum active content of 98% (tested via HPLC) and a low impurity level (<0.5%). We implement 5-step quality inspections during production, ensuring batch-to-batch consistency with a variation rate of less than 1%.
Cost-Effective Dosage: Only 0.5-2% dosage of OP-21 is required to achieve optimal emulsification, which is 20-30% lower than similar emulsifiers. This reduces overall formulation costs for customers while maintaining product performance.
Technical Specifications
Technical Parameter | Specification |
| Chemical Composition | Alkylphenol ethoxylate (21 moles EO) |
| Active Content | ≥99.0% |
Appearance (25℃) | Milky white to yellowish paste or solid |
| Cloud point, °C (1% aqueous solution) | ＞100 |
Saponification Value (mgKOH/g) | 50± 4 |
Water Content (%) | ≤ 1.0 |
pH Value (5% Aqueous Solution) | 5.0 - 7.0 |
HLB Value | ~16 |
| Solubility | It can dissolve in water and is resistant to acids, alkalis, salts and hard water. Moreover, it possesses excellent emulsifying, coloring, softening, diffusion and solubilizing properties. |
Product Uses
Pesticide Formulations: OP-21 is used as a key emulsifier in EC (Emulsifiable Concentrate) pesticides. It disperses oil-based active ingredients into water, forming stable emulsions that improve pesticide adhesion to crops and enhance bioavailability, reducing active ingredient waste by 15-20%.
Textile Auxiliaries: In textile dyeing and finishing, it acts as a wetting and dispersing agent. It helps evenly disperse dyes in water, preventing color spots on fabrics, and improves the penetration of auxiliaries into fibers, resulting in brighter, more uniform colors.
Metal Processing: It is added to metal cleaning agents and cutting fluids. Its emulsifying property dissolves oil stains on metal surfaces, while its lubricity reduces friction during cutting, extending tool life by 10-15% and improving workpiece surface smoothness.
Paint & Coating Industry: OP-21 emulsifies resin and pigment components in water-based paints, preventing pigment sedimentation and ensuring uniform coating. It also enhances paint adhesion to substrates, reducing cracking and peeling, and improves the paint's resistance to water and chemicals.
First, determine the dosage (0.5-2% of total formulation weight) based on your application. For liquid formulations: Add OP-21 to the oil phase, stir at 50-60°C for 5-10 minutes until dissolved, then slowly add the water phase while stirring (300-500 RPM) for 15-20 minutes. For solid formulations: Mix OP-21 with dry ingredients first, then add water and stir to form a uniform mixture. Avoid contact with strong acids (pH <4) or alkalis (pH >10) to maintain stability.
FAQ
Q: Is Emulsifier OP-21 compatible with food-grade applications?
A: No, OP-21 is an industrial-grade emulsifier (contains alkylphenol derivatives) and is not approved for food, pharmaceutical, or cosmetic applications that come into direct contact with human skin/mucosa.
Q: What is the recommended storage condition for OP-21?
A: Store in a cool, dry, well-ventilated area (temperature 15-30°C) in sealed plastic or iron drums. Avoid direct sunlight and moisture; shelf life is 12 months under proper storage.
Q: Can OP-21 be used in high-temperature processes above 80°C?
A: It is not recommended. Above 80°C, OP-21 may undergo partial decomposition, reducing emulsifying efficiency. For high-temperature applications, consult our technical team for customized alternatives.
Q: Does OP-21 contain APEO? Is it compliant with EU regulations?
A: Yes, OP-21 belongs to the APEO family. It does not meet EU REACH regulations restricting APEO use in textile and consumer goods, so it is more suitable for markets with no strict APEO restrictions.
