Polyethylene glycol PEG-800 has extremely high safety and is actually non-toxic, but it still requires following standard operating procedures, proper storage, and emergency handling principles.
Detailed Description
Polyethylene glycol PEG-800 (CAS number: 25322-68-3) is a non-ionic water-soluble polymer. According to the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), this product is not classified as a hazardous substance or mixture , with no physical, health, or environmental hazard label elements. Its acute oral toxicity is extremely low (rat LD50 > 5,000 mg/kg), non-irritating to skin and eyes, non-sensitizing, and negative in the Ames test. Despite its high safety, attention should still be paid to operating procedures during actual use to ensure personnel safety and product quality.
PEG-800 is a white waxy solid at room temperature, hygroscopic, chemically stable, non-flammable (closed cup flash point approx. 240–270°C), but can melt and burn at high temperatures. It is widely compatible, resistant to acids and alkalis, and maintains high performance even in hard water environments. During use, attention should be paid to its physical state changes and hygroscopic properties to avoid affecting product performance or causing safety hazards due to improper operation.
Technical Parameters
| Parameter Category | Specific Indicator |
|---|
| Appearance | White waxy solid (can transform into a colorless viscous liquid when temperature rises) |
| Acute Oral Toxicity (Rat LD50) | > 5,000 mg/kg (practically non-toxic) |
| Skin Irritation (OECD 404) | Non-irritating |
| Eye Irritation (OECD 405) | Non-irritating |
| Skin Sensitization (OECD 406) | Non-sensitizing |
| Mutagenicity (Ames Test) | Negative |
| Closed Cup Flash Point | Approx. 240–270°C |
| Biodegradability | Readily biodegradable, no bioaccumulation potential |
| Solubility | Soluble in water and various organic solvents |
Application Recommendations
- Operating Environment: Maintain good ventilation to avoid dust accumulation. Avoid generating dust as much as possible when handling the product. If dust generation is unavoidable, wear a dust mask meeting NIOSH N95 standard (or equivalent certification).
- Personal Protection: It is recommended to wear chemical safety goggles, protective gloves (e.g., nitrile rubber), and general work clothing. Do not eat, drink, or smoke during operation, and thoroughly wash hands and exposed skin after work.
- Heating Control: If melting or heating is required, control the temperature below the flash point to avoid overheating which may produce irritating vapors or degradation products, and keep away from ignition sources.
- Storage Conditions: Store in a cool, dry, well-ventilated warehouse, away from direct sunlight, with a recommended storage temperature not exceeding 40°C. Containers must be kept sealed to prevent moisture absorption and contamination by foreign matter. PEG-800 has certain hygroscopicity; reseal promptly after opening.
- Incompatible Substances: Keep away from strong oxidizers, strong acids, strong bases, etc., to prevent reactions or degradation.
Emergency Handling Precautions
- Spill Handling: For small spills, collect with a broom or shovel into a sealed container to avoid dust dispersion, then rinse residues with a damp cloth or water; for large spills, contain with inert materials (e.g., sand, vermiculite) and collect, avoiding direct discharge into sewers or the environment. Note that solid PEG spills may cause slipping hazards.
- Fire Fighting: Suitable extinguishing media include water spray, foam, dry powder, or carbon dioxide. Firefighters should wear self-contained breathing apparatus and full protective clothing. Combustion products may include carbon monoxide, carbon dioxide, and small amounts of irritant organic vapors; collect and treat firefighting wastewater.
- Skin Contact: Immediately rinse with plenty of water and soap, remove contaminated clothing, and seek medical help if irritation or allergic reaction occurs.
- Eye Contact: Hold eyelids open and rinse continuously with running water or saline for at least 15 minutes; if discomfort persists, seek medical examination.
- Ingestion: Do not induce vomiting (unless instructed by medical personnel), rinse mouth with water, slowly drink 200-300 ml of water, seek medical attention and present the product label. Large ingestion may cause gastrointestinal discomfort.
- Waste Disposal: Follow local chemical waste management regulations. Uncontaminated product can be disposed of by authorized facilities via incineration or landfill. Contaminated packaging materials should be disposed of as chemical waste and not mixed with household waste.
Key Reminder
Although PEG-800 is low in toxicity to aquatic organisms and readily biodegradable, large spills into water bodies or soil should be avoided to maintain ecological safety. The above precautions are based on current scientific knowledge and data; users should conduct risk assessments based on actual application conditions and comply with all applicable laws and regulations.
