Span S-80 (Sorbitan monooleate) is a nonionic surfactant with relatively stable chemical properties, but proper storage conditions are crucial for maintaining its product performance and extending its shelf life. The core goal of storage is to prevent oxidation, hydrolysis, or deterioration caused by high temperature, humidity, contamination, or prolonged exposure to air.
During storage, the container should be kept strictly sealed and avoid contact with incompatible substances such as strong oxidizers. After use, opened containers must be resealed tightly and stored upright to prevent leakage and ingress of external contaminants. Although the flash point of Span S-80 is above 149°C (closed cup), it should still be kept away from heat sources, sparks, and open flames to minimize safety risks.
In terms of product form, Span S-80 appears as an amber to brown viscous liquid. At low temperatures, it may become more viscous or even partially solidify, which is a physical change and does not affect product quality. If normal fluidity needs to be restored, it can be slowly warmed to room temperature or slightly higher (e.g., 30-40°C) with gentle stirring before use, but avoid local overheating or direct heating with open flames.
| Storage Parameter | Specific Requirement |
|---|---|
| Storage Temperature | Recommended below 40°C (to prevent product deterioration) |
| Environmental Requirement | Cool, dry, well-ventilated |
| Container Status | Keep sealed; reseal tightly after opening and store upright |
| Incompatible Substances | Avoid contact with strong oxidizers, etc. |
| Fire Safety Requirement | Keep away from heat sources, sparks, and open flames (flash point >149°C) |
| Storage Location | Dedicated chemical warehouse with explosion-proof ventilation and lighting equipment |
In practical operations, it is recommended to follow the "first-in, first-out" inventory management principle to avoid long-term product accumulation. For ton drums or large packages, use the bottom discharge valve to reduce the frequency of opening and air exposure. If the product shows significant color darkening, stratification, or unusual odor, quality testing should be conducted before deciding whether to continue use. In high-hygiene applications such as cosmetics, food, and pharmaceuticals, the cleanliness of the storage environment should be strictly controlled.