Polyethylene glycol PEG-4000/6000 is a non-hazardous substance, but its physicochemical properties make storage conditions crucial for maintaining product quality. This product has strong hygroscopicity, and exposure to humid air will quickly absorb moisture, leading to caking, reduced purity, and even microbial growth, affecting subsequent use. Therefore, the sealing of the packaging container is the top priority in storage management; it should be resealed promptly after opening.
Regarding temperature, it is recommended to control the storage environment within the range of room temperature 10-30°C. Excessive temperatures may soften and cause flaky or granular products to stick together, affecting material flow. While low temperatures do not directly damage the chemical properties, condensation caused by temperature fluctuations can introduce moisture. The warehouse should be well-ventilated to avoid localized temperature and humidity accumulation.
Additionally, although PEG-4000/6000 is chemically stable and resistant to acids and bases over a wide pH range, it must be kept strictly away from strong oxidizing agents (such as peroxides, potassium permanganate, concentrated nitric acid, etc.) to avoid violent oxidation reactions. Meanwhile, fine dust of the product can form explosive mixtures with air (dust explosion class St1), so the storage area must be free of open flames, sparks, and other ignition sources, and anti-static grounding measures should be implemented.
| Storage Parameter | Requirement |
|---|---|
| Temperature | Room temperature 10-30°C (cool environment) |
| Humidity | Dry environment, strictly moisture-proof |
| Ventilation | Good ventilation to avoid dust accumulation |
| Packaging Sealing | Container must be sealed; reseal promptly after opening |
| Incompatible Materials | Keep away from strong oxidizing agents (peroxides, potassium permanganate, concentrated nitric acid, etc.) |
| Ignition Source Control | No open flames or sparks; equipment grounded for anti-static |
| Stacking | Follow safety regulations to prevent tipping and packaging damage |
It is recommended to adopt the first-in, first-out inventory management principle to avoid long-term product accumulation. Upon receipt, check packaging integrity; if damaged, immediately transfer to a dry, sealed container. Regularly check the temperature and humidity of the storage area, and equip dehumidifiers if necessary. For opened products, desiccant packets can be used to assist moisture prevention, or repackage into smaller sealed containers to reduce air exchange during each opening.