What safety precautions should be taken when using polyethylene glycol PEG-400?

Polyethylene glycol PEG-400 is a non-hazardous chemical, chemically stable at room temperature and non-flammable, but still requires standard operating procedures to ensure safe use.

Detailed Description

Polyethylene glycol PEG-400 (CAS No.: 25322-68-3) is not classified as a hazardous chemical according to the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), with no hazard pictograms, no signal word, and no hazard statements. Its closed-cup flash point is approximately 238°C, giving it a high flash point characteristic, making it non-flammable and non-explosive, and it does not cause serious irritation to skin and eyes, resulting in a low overall safety risk. The Water Hazard Class (WGK) is 1, indicating slight hazard to water bodies, so care must be taken to prevent the product from entering sewers or water bodies.

Although PEG-400 has high safety, good ventilation should still be maintained during actual operation to avoid inhaling vapors or mists. It is recommended to wear chemical safety goggles and nitrile or neoprene protective gloves during operation, and wash hands thoroughly after handling. Contaminated clothing must be thoroughly washed before reuse. Eating, drinking, and smoking are prohibited in the workplace. Avoid contact with strong oxidizers to prevent dangerous reactions.

For storage, containers should be kept sealed and stored in a cool, dry, and well-ventilated warehouse. The recommended storage temperature is between 5°C and 30°C. Keep away from heat sources, sparks, and open flames. Store separately from incompatible substances such as strong oxidizers and strong acids. Avoid prolonged exposure to air to prevent moisture absorption and quality deterioration.

Safety Parameters Overview

Emergency Treatment Guidelines

• Inhalation: Move the person to fresh air and keep breathing unobstructed; if symptoms persist, seek medical attention immediately.
• Skin contact: Immediately remove contaminated clothing and thoroughly wash the affected area with plenty of water and soap.
• Eye contact: Hold eyelids open and rinse continuously with flowing water or saline for at least 15 minutes, then seek medical examination as soon as possible.
• Ingestion: Do not induce vomiting; rinse mouth thoroughly with water and seek medical attention immediately.
• Spill handling: For small spills, cover with inert absorbent material (e.g., sand) and collect in containers; for large spills, build dikes or dig pits to contain, transfer to dedicated closed containers, and dispose of in accordance with local regulations. Prevent the product from entering sewers or water bodies.

Precautions

PEG-400 is hygroscopic; after opening, it should be sealed and stored as soon as possible to avoid quality deterioration due to moisture absorption from the air. If the product solidifies or becomes cloudy at low temperatures, this is a normal physical change; it can be placed in a warm environment to slowly return to room temperature and then used normally without affecting product performance. It is recommended to operate in a fume hood or a well-ventilated area, especially when heating, as attention should be paid to vapor diffusion.