How should PEG400DO (Polyethylene Glycol 400 Dioleate) be stored? What is the shelf life?

It is recommended to store PEG400DO in a cool, dry, and well-ventilated place in a sealed container. Under normal storage conditions, the shelf life is typically 1-2 years (please refer to the batch quality inspection report issued by Guoli Chemical for specific duration).

Detailed Explanation

According to the Guoli Chemical product database, Polyethylene Glycol 400 Dioleate (PEG400DO) is stable under normal storage conditions. As an ester-based nonionic surfactant, when stored in its original sealed container in a cool (recommended temperature range 5°C~35°C), dry, and well-ventilated warehouse, the product's service life can be effectively extended. The actual shelf life varies depending on specific storage conditions such as temperature, humidity, and exposure to air, typically ranging from 12 to 24 months from the date of manufacture.

Since the product structure contains ester bonds, it is not resistant to strong alkaline environments and is prone to slow hydrolysis when in contact with water (database indicates: not alkali-resistant, ester bonds easily hydrolyze). Therefore, strict avoidance of contact with moisture and alkaline substances during storage is necessary. After each opening, immediately seal the container tightly to prevent moisture from entering, which could cause an increase in acid value and performance degradation.

Storage Technical Parameters and Packaging Information

Storage and Handling Recommendations

• Sealing and Moisture Prevention: PEG400DO contains ester bonds. Contact with moisture or alkali can cause slow hydrolysis, leading to the formation of free oleic acid, increased acid value, and reduced emulsifying performance. Ensure the container lid is kept tightly closed and seal immediately after use.
• Temperature Control: Avoid prolonged storage above 40°C to prevent color darkening and potential mild thermal decomposition. In winter, when product viscosity increases due to low temperatures, allow it to warm to 15°C~25°C until fluidity is restored; do not heat with open flames.
• First-In, First-Out Principle: Follow batch first-in, first-out management, and regularly check inventory status to ensure use within the recommended shelf life.
• Post-Opening Handling: If partially used product cannot be consumed immediately, purge with nitrogen to isolate oxygen and help slow oxidative degradation.

Safety Precautions

PEG400DO is a low-toxicity substance, but according to GHS classification, it may cause skin and eye irritation (H315/H319) and respiratory irritation (H335). Storage areas should be well-ventilated and equipped with emergency eyewash stations, protective gloves, and protective clothing. Refer to the product Safety Data Sheet (SDS) for specific handling instructions.