Polyethylene glycol PEG-800 (CAS No.: 25322-68-3) is a non-ionic water-soluble polymer with high chemical stability, appearing as a white waxy solid at room temperature. The key points for its storage are moisture prevention and temperature control. Since PEG-800 has certain hygroscopicity, prolonged exposure to humid air will gradually absorb moisture, potentially leading to product caking or a decrease in active ingredient content; therefore, container sealing is crucial.
Under recommended storage conditions (cool, dry, well-ventilated, temperature ≤40°C), PEG-800 hardly undergoes chemical degradation. The product is non-flammable, non-volatile, and does not react with common packaging materials, endowing it with excellent long-term storage potential. If the packaging is intact and uncontaminated, the product can maintain its key performance indicators (such as hydroxyl value, viscosity, pH value) within qualified range for many years after production.
| Storage Factor | Specific Requirements |
|---|---|
| Temperature | Not exceeding 40°C. Low-temperature storage can maintain stable properties (melting point 28~32°C. High ambient temperature may cause product softening or partial melting). |
| Humidity | Maintain dry environment; container must be sealed to prevent moisture absorption (moisture content indicator ≤1.0%). |
| Light | Avoid direct sunlight; store in a cool place in the warehouse. |
| Container | Keep original packaging sealed; reseal promptly after opening. Common packaging specifications: 50kg plastic drum, 200kg plastic drum, IBC tote. |
| Isolation Requirements | Keep away from strong oxidizers, strong acids, strong bases, and other incompatible substances; stay away from heat sources and open flames. |
| Safety Management | Floor should be treated for slip resistance (solid PEG leakage may cause slip hazard); storage area should be equipped with inert absorbent materials. |
To ensure usage effects, it is recommended to follow the "first-in, first-out" principle. After each use, immediately seal the container to avoid prolonged exposure to air. If the product shows obvious discoloration, odor, or severe moisture-caking due to improper storage, quality testing is recommended before deciding whether to continue using. In applications with high purity requirements, such as pharmaceuticals and personal care products, storage conditions should be strictly controlled.