Castor Oil Polyoxyethylene Ether EL-90 (CAS: 61791-12-6) is a chemically stable nonionic surfactant, and its storage conditions directly affect the retention of product performance. According to the safety instructions of Guoli Chemical, the recommended long-term storage temperature for this product is 5°C to 40°C. At low temperatures (below 5°C), the product may solidify or become turbid, which is a normal physical change and not a sign of product deterioration—simply warm it slowly within the recommended temperature range (e.g., using indirect heating in a warm water bath) and stir evenly to restore normal performance; do not use an open flame to directly heat the container.
The choice of packaging container is equally critical. It is recommended to use containers made of stainless steel, high-density polyethylene (HDPE), or polypropylene (PP), and the containers must be clean, dry, and well-sealed. Ordinary carbon steel should not be in long-term direct contact with the product. The product should be kept away from incompatible substances such as strong acids, strong bases, strong oxidizers, and hypochlorites. Warehouse management should follow the "first in, first out" principle.
Regarding shelf life, the product database does not officially specify a specific shelf life. Based on the chemical structure of this product (polyoxyethylene ether nonionic surfactant) and industry practice, under strict compliance with the above storage conditions and keeping the original sealed packaging, it is recommended to use within 2 years from the date of manufacture to ensure optimal performance. For the exact shelf life, please refer to the product's certificate of analysis (COA) or label markings.
The following are key technical indicators related to storage and use:
| Parameter Item | Technical Indicator |
|---|---|
| Appearance | Light yellow to yellow paste or viscous liquid |
| Melting Point/Freezing Point | 35~40°C |
| Recommended Storage Temperature | 5°C to 40°C |
| Effective Content | ≥99% |
| Moisture | ≤1.0% |
| pH Value (1% Aqueous Solution) | 5.5~7.5 |
| Chemical Stability | Good chemical stability against acids, alkalis, hard water, and oxidizing agents |
| Hygroscopicity | Hygroscopic |
| Flash Point | >250°C |
| Packaging Specifications | 50kg plastic drum, 200kg plastic drum, IBC tote |
This product is widely used in industrial fields such as chemical fiber oil agents, pesticide emulsifiers, textile auxiliaries, and metalworking fluids. It is recommended that users check the batch number and production date after receiving goods and prioritize using earlier batches for production. For large-quantity purchases (e.g., IBC tote packaging), consider sub-packaging into smaller containers to reduce the frequency of opening the main container and minimize moisture absorption and contamination risks. If the product solidifies due to low temperatures, place the entire drum in a room at 20~35°C for natural warming, or use indirect heating with a water bath not exceeding 50°C, stirring periodically; avoid localized overheating.