What are the storage conditions for polypropylene glycol PPG-400?

Polypropylene glycol PPG-400 should be stored in a cool, dry, and well-ventilated warehouse. The recommended storage temperature is 0–40°C. Keep containers tightly sealed to prevent moisture, and keep away from fire sources and incompatible substances.

Detailed Explanation

The storage of polypropylene glycol PPG-400 requires three key considerations: moisture prevention, temperature control, and isolation. The product has certain hygroscopicity. If exposed to air for a long time, it will absorb moisture, leading to quality degradation. Therefore, packaging containers must be kept sealed. After opening, use as soon as possible and reseal immediately. The product is packaged in clean and dry galvanized iron drums or IBC totes. Under sealed original containers and appropriate temperature, the shelf life is at least 12 months.

The storage environment should be a cool, well-ventilated warehouse, avoiding direct sunlight and high temperature. At the same time, it must be kept away from fire, heat sources, and other potential ignition risks. Although the product has a high flash point (closed cup approx. 220–230°C) and is not classified as a flammable liquid, combustible vapors may still form under high temperature conditions. Therefore, a no-smoking or no-open-flame sign should be posted in the storage area, and appropriate fire extinguishing equipment (such as water mist, foam, dry powder, carbon dioxide fire extinguishers) should be provided.

The product is chemically stable, but to ensure safety, it should be stored separately from incompatible substances such as strong oxidizers, strong acids, and strong bases to prevent dangerous reactions. It is recommended to use anticorrosive, well-sealed containers such as stainless steel drums, polyethylene drums, or resin-lined iron drums, and equip with spill containment facilities in case of accidental leaks.

Storage Condition Parameters

Handling and Maintenance Recommendations

• Immediately seal the container after removing the product to minimize contact with air and prevent moisture absorption and quality degradation.
• Regularly check the sealing of storage containers; if any leakage is found, transfer to a spare container promptly.
• Avoid storing the product outdoors or in environments where freezing may occur. Low temperatures may increase viscosity but do not affect quality; after returning to room temperature, it can be used normally.
• The storage area should be equipped with spill containment facilities (such as spill containment pallets) and keep the floor clean and dry.

Precautions

• Do not store the product together with strong oxidizers, strong acids, or strong bases to avoid unforeseen chemical reactions.
• Although this product has low acute toxicity (rat oral LD₅₀ > 2000 mg/kg), unauthorized personnel should be kept out of the storage area. Eating, drinking, or smoking is strictly prohibited in the storage area.
• Empty containers should be emptied of residue and disposed of by qualified units according to hazardous waste management regulations. Do not discard arbitrarily or mix with domestic waste.
• Avoid large-scale leakage of the product into sewers, surface water, or groundwater. Although it has low toxicity to aquatic organisms (fish, daphnia, algae L(E)C₅₀ all >100 mg/L), environmental pollution should still be prevented.