Span S-60 (Sorbitan monostearate) is a chemically stable non-ionic surfactant, but improper storage conditions may still lead to performance changes. Correct storage is essential to maintain its emulsifying efficiency, color, and fluidity.
The core requirements of storage environment are cool, dry, well-ventilated. The product should always be kept in a sealed container to prevent moisture absorption and ingress of foreign materials. Since Span S-60 has certain hygroscopicity, exposure to humid air may cause caking, affecting weighing and dispersion during subsequent use. At the same time, direct sunlight should be avoided, as prolonged UV exposure may darken the product's color.
The product may solidify under low-temperature conditions. This is a normal physical change and not a sign of degradation. If solidification occurs, simply allow the product to return to room temperature before use, and its chemical properties and emulsifying performance will not be affected. After opening, if not fully used, ensure the inner bag is tightly sealed to minimize contact with air.
| Storage Condition | Specific Requirements |
|---|---|
| Storage Temperature | Recommended below 35°C, avoid extreme temperatures and temperature fluctuations |
| Environmental Requirements | Cool, dry, well-ventilated |
| Light Requirements | Avoid direct sunlight |
| Container State | Keep sealed to prevent moisture and ingress of foreign materials |
| Keep Away From | Keep away from strong oxidizing agents (e.g., high-concentration peroxides, hypochlorites, etc.) |
| Packaging Material | Typically paper bags with polyethylene inner lining, multi-layer kraft paper bags, or fiber drums |
| Stacking Limit | Observe the stacking layer limit indicated on the packaging to prevent damage to bottom containers |
| Low Temperature Behavior | Solidification may occur at low temperatures; restore to room temperature before use, quality unaffected |
In actual production use, it is recommended to follow the "First In First Out" inventory management principle to ensure product usage within its optimal shelf life. For users storing large quantities for long periods, consider storing the product in a warehouse with controlled temperature and humidity, especially in humid or rainy seasons in southern regions, where moisture prevention measures should be emphasized.
The product should be used as soon as possible after opening. If it cannot be used up in the short term, it is recommended to tightly seal the inner bag with a closure clip or tie, and optionally add an extra plastic bag as a second layer for moisture protection. If severe caking, discoloration, or off-odor is observed, discontinue use and perform quality inspection.
Empty containers may contain product residues and must follow the same safety handling and disposal procedures as this product. Without thorough cleaning, empty containers must not be used to hold other materials to avoid cross-contamination or unpredictable chemical reactions. Waste disposal should comply with local, national, and regional regulations, and be sent to licensed waste treatment facilities for incineration or landfill, and should not be discarded with household waste.