Product Details
CasNo： 36290-04-7
MF： (C10H8O3S)n.(CH2O)n.xNa
Appearance： liquid
Delivery Time： 15 days
Packing： 200kg/drum
Purity： 99%
1. Chemical and Physical Properties
- Chemical Type: It belongs to the category of alkylnaphthalene sulfonate formaldehyde condensates, anionic surfactants specifically designed as high-efficiency emulsifying and wetting agents for pesticide oil-dispersible suspensions (OD) and emulsifiable concentrates (EC).
- Appearance and Physicochemical Indicators: It appears as a yellow-brown to dark brown viscous liquid with a density of approximately 1.05~1.15 g/cm³ (at 20℃). The pH value (1% aqueous solution) ranges from 6.0 to 8.0. It is miscible with most organic solvents (e.g., xylene, mineral oil) and water in any proportion.
2. Mechanism of Action
- Synergistic Emulsification and Wetting: The alkylnaphthalene sulfonate groups in the molecule can quickly penetrate the surface of pesticide technical particles and the oil-water interface. They simultaneously reduce the solid-liquid and oil-water interfacial tension, enabling the technical material to disperse and emulsify rapidly in the oil or aqueous phase, preventing particle agglomeration or oil-phase stratification.
- Stable System Construction: Through electrostatic repulsion and steric hindrance effects, a dense adsorption layer is formed on the surface of pesticide dispersed particles to prevent aggregation between particles. At the same time, it maintains the stability of the oil-water emulsification system, ensuring that the formulation does not stratify or break emulsion during storage and transportation.
3. Key Application Technical Points
- Addition Amount: Generally, it accounts for 3%~6% of the pesticide formulation mass (the specific amount needs to be adjusted according to the characteristics of the technical material). For example, in abamectin 5% OD, the addition amount is approximately 4.5%.
- Addition Method: During the emulsification and dispersion stage of oil-dispersible suspensions/emulsifiable concentrates, it is uniformly mixed with technical materials, solvents, emulsifiers and other components to ensure uniform distribution in the formulation.
- Compatibility: It can be used synergistically with most non-ionic emulsifiers (e.g., castor oil ethoxylates) and anionic dispersants. Direct mixing with strong cationic adjuvants should be avoided.
4. Performance Advantages and Market Value
- High-Efficiency Emulsification and Dispersion: In OD/EC formulations of hard-to-emulsify technical materials such as abamectin and emamectin benzoate, after adding TERWET 1221, the emulsification and dispersion time can be controlled within 3 minutes, and the emulsion stability (30 days of normal temperature storage) is ≥99%. This is better than traditional emulsifying and wetting agents (which usually have an emulsification time of 5~8 minutes and an emulsion stability of ≤95%).
- Outstanding Cost-Effectiveness: Compared with imported similar adjuvants (such as a certain brand's Atlox series), it has a 12%~20% lower procurement cost. Meanwhile, its lower dosage (reduced by 1%~2%) can effectively reduce the formulation cost of pesticide preparation enterprises.
- Excellent Storage Stability: After 14 days of high-temperature storage at 54℃, the emulsification performance and dispersion stability attenuation of formulations containing TERWET 1221 are ≤4%, which can meet the long-term storage and transportation requirements of major global agricultural markets.
