Tween T-80 (Polyoxyethylene (20) sorbitan monooleate) is a nonionic surfactant with generally good chemical stability. However, improper storage conditions may still lead to moisture absorption, oxidation, or degradation, affecting its core properties such as emulsification and solubilization. Therefore, following standard storage requirements is essential to maintain product quality.
Firstly, the warehouse environment should be kept cool, dry, and well-ventilated. Tween T-80 has certain hygroscopic properties; exposure to humid air will gradually absorb moisture, potentially causing turbidity or microbial growth. Secondly, containers must be tightly sealed, and after each use, they should be immediately resealed with clear labels to prevent moisture absorption and contamination from external pollutants.
Regarding temperature control, the recommended storage temperature range is 10–30°C, avoiding freezing and excessively high temperatures. Low temperatures may cause layering or turbidity (which usually recover upon warming), while sustained high temperatures will accelerate oxidation, leading to darker color and increased acid value. Additionally, the warehouse should be kept away from heat sources, sparks, open flames, and strong oxidizing agents and other incompatible substances to eliminate safety hazards.
| Storage Parameter | Specific Requirement |
|---|---|
| Recommended Storage Temperature | 10–30°C |
| Environmental Requirement | Cool, dry, well-ventilated |
| Container Status | Tightly sealed, reseal promptly after opening |
| Materials to Keep Away From | Heat sources, sparks, open flames, strong oxidizing agents |
| Warehouse Type | Dedicated warehouse with clear labeling |
| Avoid Conditions | Freezing, excessively high temperature, humidity, direct sunlight |
| GHS Classification | Non-hazardous substance or mixture |
In practical use, it is recommended to manage inventory following the "first in, first out" principle. If the product becomes turbid or layered after low-temperature storage, allow it to rest at room temperature (20–25°C) before use to recover, and gently stir if necessary to ensure uniformity. Direct heating is not recommended. For batches stored long-term, it is advisable to periodically inspect key indicators such as appearance, acid value, and hydroxyl value to ensure no significant degradation before use.
Tween T-80 is widely used in industries with high hygiene requirements such as pharmaceuticals, food, and cosmetics. Therefore, the cleanliness and airtightness of storage containers are particularly critical. For large packaging (e.g., drums), it is recommended to use dedicated clean sampling tools to avoid cross-contamination.