Tween T-20 coconut acid (Polyoxyethylene (20) sorbitan monolaurate, CAS No.: 9005-64-5), as a mature nonionic surfactant, may encounter several typical issues in practical applications. It is recommended to investigate step by step as follows:
1. Poor emulsification effect or emulsion layering
First, check whether the HLB value matches the oil phase system — the HLB value of Tween T-20 coconut acid is approximately 16.7, suitable for O/W emulsion systems. If the oil phase has low polarity, it may need to be compounded with a low-HLB emulsifier (such as Span series) to adjust the overall HLB value. Next, verify whether the dosage is sufficient; the recommended dosage is generally 5% to 15% of the oil phase weight. Finally, confirm whether the emulsification process parameters (temperature, shear speed, addition sequence) are reasonable. It is recommended to heat the oil phase and water phase separately to the same temperature before mixing and homogenizing.
2. Unsatisfactory solubilization effect
Check whether the ratio of solubilizate to surfactant is appropriate. Typically, the surfactant dosage should be 3 to 10 times that of the solubilizate. Pay attention to the addition sequence: first dissolve the active substance in Tween T-20 coconut acid, then slowly add water. If the system is cloudy, try raising the temperature appropriately or adjusting the pH to neutral range.
3. Product becomes cloudy or precipitates
Tween T-20 coconut acid may become cloudy or even solidify at low temperatures (below 5°C). This is a physical change and does not affect product quality. Simply return the product to room temperature (15°C to 30°C) and stir evenly to restore transparency. If accompanied by a peculiar odor or significant color deepening, it may have deteriorated and should be discarded.
4. Excessive foaming affecting operations
Tween T-20 coconut acid has certain foaming properties. If used in processes requiring low foam, a small amount of defoamer (such as silicone-based) can be added, or an alternative cleaning scheme with a lower cloud point can be adopted to control operating temperature.
| Parameter | Typical Value/Description |
|---|---|
| Product Name | Tween T-20 coconut acid (Polyoxyethylene (20) sorbitan monolaurate) |
| CAS No. | 9005-64-5 |
| Appearance | Light yellow to amber viscous liquid |
| Ion Type | Nonionic surfactant |
| HLB Value | Approximately 16.7 |
| Recommended Storage Temperature | 5°C to 35°C |
| Shelf Life | 24 months from date of manufacture (under recommended storage conditions) |
| Chemical Stability | Excellent in acid, alkali, and hard water media |
Official technical support access methods:
To ensure optimal performance of Tween T-20 coconut acid, it is recommended to: shake well or stir before use; seal and store promptly after opening to prevent moisture absorption; conduct small-scale verification during formulation development to confirm compatibility with other components in the system; for new application areas using this product for the first time, consult with Guoli Chemical technical personnel to confirm suitability before mass production.