Polyethylene Glycol Distearate 400DS (PEG-400 Distearate) is a chemically stable nonionic surfactant that does not undergo polymerization or hazardous decomposition under recommended storage and handling conditions. Its stability primarily relies on protection from heat, moisture, and sealed storage. Under normal storage conditions, the product does not deteriorate, delaminate, or lose performance, and can maintain its emulsifying, dispersing, and thickening functional properties for a long time.
Regarding shelf life: Since the specific shelf life is not explicitly marked in the product database, it is recommended to refer to the production date and expiration date on the product packaging label. According to industry practice and stability data of similar nonionic surfactants, under strict adherence to storage conditions, the recommended usage period for this product is typically 2 years from the date of manufacture. For products beyond the shelf life, it is recommended to conduct small-scale performance verification before use to confirm that key indicators such as emulsifying power and dispersibility have not significantly decreased.
Special attention should be paid to moisture prevention during storage. Due to the hygroscopic nature of the polyethylene glycol segment, the packaging container should be sealed as soon as possible after opening to avoid moisture absorption and caking, which may affect subsequent use and weighing accuracy.
| Storage Factor | Specific Requirement |
|---|---|
| Temperature | It is recommended to control between 5°C and 40°C, avoid prolonged exposure to excessive temperatures |
| Humidity and Environment | Cool, dry, well-ventilated warehouse; keep packaging containers tightly closed to prevent moisture and foreign objects from entering |
| Keep away from ignition sources | Keep away from heat sources, sparks, open flames; combustion or thermal decomposition may release gases such as carbon monoxide and carbon dioxide |
| Incompatible materials | Avoid contact or storage with strong oxidizers |
| Segregation | Avoid storage with food, feed, pharmaceuticals, and personal protective equipment |
| Packaging management | Seal promptly after opening; empty packaging containers should be cleaned and recycled or disposed of as general industrial solid waste |
If the product exhibits slight solidification or hardening due to short-term low temperature, it is a normal physical state change and does not affect product performance. Before use, the sealed package can be placed in an environment of 20°C to 35°C to naturally return to temperature. Once the material returns to a uniform state, it can be used normally without heating to melt. Sampling tools should be kept clean and dry to avoid introducing moisture or other impurities into the packaging container.