Tween T-81 (Polyoxyethylene (5) sorbitan monooleate) is a nonionic surfactant with relatively stable chemical properties, but proper storage conditions are crucial to ensure long-term product performance. This product is an amber oily liquid. Improper storage may lead to oxidative deterioration, stratification, or microbial contamination, affecting its core functions such as emulsification, solubilization, and dispersion.
Regarding the shelf life, no specific duration is indicated in the product database. Based on industry common practice and the characteristics of nonionic surfactants, under strict adherence to storage conditions, the recommended usage period for Tween T-81 is generally 2 years (from the date of production). It is recommended to refer to the specific shelf life indicated on the product packaging or the Certificate of Analysis (COA), and follow the "first in, first out" principle for inventory management.
| Storage Requirement | Specific Instructions |
|---|---|
| Storage Environment | A cool, dry, and well-ventilated place |
| Temperature Range | 5°C to 30°C, avoid freezing and overheating |
| Container Requirements | Keep the container tightly closed, use corrosion-resistant, well-sealed containers, and clearly label them |
| Avoidances | Keep away from heat sources, sparks, open flames, and incompatible substances such as strong oxidizers |
| Regular Inspection | Regularly inspect containers for signs of damage or leakage |
After each use, immediately seal the container to minimize prolonged exposure of the product to air. For bulk storage users, it is recommended to aliquot the product into smaller containers for individual use to avoid repeatedly opening the same package and introducing contamination. If any abnormal changes in appearance (e.g., significant darkening of color, turbidity, or stratification) or odor are observed, discontinue use and perform quality testing.