Question

What are the storage conditions for polyethylene glycol PEG-300?

Answer

2026-05-27 官方文档聚乙二醇PEG-300

Polyethylene glycol PEG-300 should be stored in a cool, dry, and well-ventilated environment, with a recommended temperature of 5℃ to 40℃, strictly sealed to prevent moisture, and kept away from strong oxidizers and incompatible substances.

Detailed Description

Polyethylene glycol PEG-300 is chemically stable under normal storage conditions, but due to its hygroscopic properties, it has high requirements for the humidity of the storage environment and the sealing of containers. Proper storage methods not only ensure product quality but also effectively extend its service life. This product is not classified as flammable or hazardous, but it still needs to follow conventional chemical storage regulations.

Special attention should be paid to moisture prevention and temperature control during storage. If PEG-300 is exposed to humid air for a long time after opening, it will gradually absorb moisture, leading to product dilution, which in turn affects its formulation accuracy and performance in precision applications such as pharmaceuticals and daily chemicals. At the same time, although this product has a high flash point (closed cup flash point 195℃ to 234℃) and is not a flammable liquid, appropriate electrostatic grounding measures are still recommended when involving large-scale pumping or stirring operations.

Technical Parameters

Storage Condition Category	Specific Requirements
Storage temperature	Recommended 5℃ to 40℃, avoid freezing or prolonged exposure to high temperatures
Storage environment	Cool, dry, and well-ventilated warehouse
Container material	Original sealed container, stainless steel, or polyethylene (HDPE/LDPE) materials
Sealing requirement	Keep container sealed, reseal promptly after opening to prevent moisture absorption
Isolation requirement	Store separately from incompatible substances such as strong oxidizers, strong acids, strong bases, etc.
Fire source control	Keep away from open flames, heat sources, and areas where strong oxidizers are stored
Stacking requirement	Stable stack, stacking height in compliance with safety regulations, clear labeling in storage area

Application Suggestions

Storage suggestions for different application scenarios:

Pharmaceutical use: It is recommended to use stainless steel or HDPE dedicated containers for separate storage, strictly control temperature and humidity, avoid cross-contamination, and use up as soon as possible after opening.
Daily chemical production: For large-scale storage, stainless steel tanks with nitrogen blanketing can be used to reduce contact with air and prevent moisture absorption and deterioration.
Industrial application: If used in fields with low sensitivity to moisture, such as coatings and rubber, storage conditions can be appropriately relaxed, but containers must still be kept sealed.
Agricultural use: Avoid mixing with pesticide technical materials or concentrated formulations to prevent misuse or cross-contamination.

Precautions

This product is hygroscopic. Prolonged open storage will cause it to absorb moisture and dilute, affecting the content of active ingredients.
Avoid contact with strong oxidizers (such as peroxides, permanganates, concentrated nitric acid, etc.) to prevent hazardous reactions.
The floor should be treated with leak-proof measures, and containment berms or trays should be set up in the work area to prevent spilled material from entering drains and soil.
Although it is not a flammable material, the operating temperature should be kept away from the flash point. It is recommended to control it within a safe range below 170℃.
Clear chemical identification and safety warning signs should be set up in the storage area. Work clothes should be cleaned regularly and not taken out of the workplace.

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