PEG-200 should be stored sealed in a cool, dry, and well-ventilated place; recommended temperature 15–30°C; under compliant storage conditions, the shelf life is typically 2 years.
Detailed Explanation
Polyethylene glycol PEG-200 is chemically stable but highly hygroscopic. Therefore, the key point for storage is moisture-proof sealing. The product itself is non-flammable and non-explosive, not classified as dangerous chemicals, making storage relatively safe and simple. It is important to note that prolonged exposure to air will cause PEG-200 to absorb moisture, potentially leading to decreased purity and performance degradation.
Regarding shelf life, the product database of Guoli Chemical does not explicitly specify the exact shelf life of PEG-200. According to industry general standards, the shelf life for polyethylene glycol series products, when unopened and strictly following storage requirements, is generally 2 years from the date of manufacture. It is recommended that users refer to the production batch number and expiration date on the product packaging. After opening, use as soon as possible and seal immediately after each use.
Storage Conditions Overview
| Storage Element | Specific Requirement |
|---|
| Storage Temperature | Recommended 15°C to 30°C (cool environment) |
| Environmental Requirements | Dry, well-ventilated, avoid moisture |
| Container Sealing | Must keep container sealed to prevent moisture absorption |
| Recommended Container Material | Stainless steel, polyethylene (PE), or epoxy-lined carbon steel container |
| Substances to Avoid | Strong acids, strong oxidizers, and other incompatible chemicals |
| Fire Protection Requirements | Non-flammable, any fire extinguishing medium is suitable (water spray, dry powder, carbon dioxide, foam) |
| Storage Area | Should have spill containment facilities, away from ignition sources |
Application Recommendations
To ensure PEG-200 maintains optimal performance during its usage cycle, it is recommended:
- Sub-packaging Management: When purchasing in large quantities, divide into smaller containers according to estimated usage to reduce the moisture absorption risk from frequent opening of the main package.
- First-In, First-Out: Follow the principle of "first in, first out" to avoid uncertain quality due to prolonged storage.
- After Opening: Seal immediately after taking material. If any abnormal phenomena such as turbidity, layering, or odor are found, stop use and conduct quality testing.
- Keep Labels: Always retain labels and batch number information on the original product packaging for traceability and emergency reference.
Precautions
- The product database does not explicitly mark shelf life data. The above 2-year shelf life is an industry general reference value. Please refer to the product factory inspection report and packaging markings for specifics.
- If the storage temperature is too low (below 10°C), PEG-200 may experience increased viscosity or slight crystallization. This is a physical change. After warming to room temperature and stirring evenly, it can still be used normally without affecting product quality.
- Do not discharge into sewers, soil, or any water bodies during disposal. Dispose of in authorized waste treatment facilities in accordance with regulations.
- In case of major leakage, contain the source of leakage, prevent entry into sewers or water bodies, and promptly notify environmental protection authorities.
