Span S-20 lauric acid (sorbitan monolaurate) is a nonionic surfactant. Although it is not classified as a dangerous good under current regulations, it should still be managed according to chemical specifications in industrial storage. Proper storage conditions are crucial for maintaining the product's emulsifying properties and shelf life.
The product appears as a pale yellow to amber viscous liquid with a typical aliphatic ester odor. Improper storage may cause the product to darken in color, reduce emulsifying efficiency, or undergo deterioration. The recommended storage period should not exceed 24 months from the production date, and the specific expiration date should refer to the Certificate of Analysis (COA).
After opening the packaging, it should be immediately resealed to prevent moisture and impurities from entering the air, and to avoid vapor accumulation. Containers should be placed on corrosion-resistant trays to prevent accidental leakage and spread, and the seal of the container should be periodically inspected.
| Storage Parameter | Specific Requirement |
|---|---|
| Storage Temperature | 5°C to 35°C (avoid freezing or sustained high temperature) |
| Environmental Requirement | Cool, dry, well-ventilated |
| Container Condition | Keep sealed, reseal immediately after use |
| Away From Sources | Heat sources, sparks, open flames |
| Incompatible Materials | Strong oxidizers, strong acids, strong bases (store separately) |
| Recommended Packaging Material | Stainless steel, polyethylene, or coated iron drums |
| Prohibited Packaging Material | Copper and its alloys |
| Storage Period | Not exceeding 24 months from production date (refer to COA) |
| Other Requirements | Place on corrosion-resistant trays to prevent leakage spread |
Before use after long-term storage, it is recommended to visually inspect the product and conduct simple emulsifying performance tests. If the product shows obvious separation, significant color deepening, or abnormal odor, use should be discontinued. For applications with strict hygiene requirements such as food, pharmaceuticals, and cosmetics, it is recommended to follow the "first in, first out" principle and prioritize earlier batches within the shelf life.