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Product Name: Polypropylene Glycol, Molecular Weight 2,000
Chemical Family: Polyethers
Chemical Formula: H-(C3H6O)n-OH
Common Uses: Often shows up in polyurethane production and acts as a base for adhesives, coatings, and sealants.
Physical State: Viscous liquid, colorless to slightly hazy
Route of Exposure: Skin, eyes, inhalation, ingestion
Main Hazards: Mild skin and eye irritation, slippery spills that raise fall risks, inhalation of mist causing mild respiratory irritation
Hazard Class: Not classified as hazardous under typical chemical regulations due to low toxicity
Combustibility: Can catch fire at high temperatures, though flammability falls in the lower-to-moderate range
Main Ingredient: Polypropylene glycol (over 99%)
CAS Number: 25322-69-4
Impurities: Trace amounts of propylene oxide or water may linger from manufacturing, but these sit below exposure limits in well-handled batches
Skin Contact: Wash area with soap and water, discard contaminated clothing if coverage is extensive
Eye Contact: Flush with running water for several minutes, remove contacts if present
Inhalation: Move to fresh air, breathe deeply, and rest if discomfort follows working in misty or poorly ventilated spots
Ingestion: Rinse mouth, seek medical help if a large amount swallowed or discomfort lingers; generally, swelling or chemical burns are rare
Extinguishing Media: Use dry chemical, foam, carbon dioxide, or water spray
Protection: Firefighters suit up with self-contained breathing apparatus due to toxic fume risks if the liquid really heats up
Hazardous Combustion Products: May give off carbon oxides and low levels of acrid smoke
Explosion Risk: Low, though hot surfaces and open flame in confined spaces ought to get avoided
Containment: Block off area, take steps to keep liquid from slipping into drains where it can pool unnoticed
Cleanup Methods: Absorb with inert substance like sand or clay, take care on smooth floors to fight off slips
Protection: Rubber gloves and splash-proof goggles for the cleaning team, ventilate if working in enclosed spots
Environmental Risk: Polypropylene glycol degrades slowly, small spills minimize harm but large, repeated leaks should get handled with urgency
Handling: Keep drums and containers tightly closed, keep product cool and sheltered from strong sunlight
Storage Conditions: Store at ambient temperature, lock away from acids, oxidizers, and moisture
Incompatibilities: Strong oxidizing agents may kick off unwanted reactions
Precautions: Avoid storing above head height, label containers to ensure mix-ups won’t occur
Engineering Controls: Basic local exhaust ventilation in large-scale use, open windows can also help
Personal Protection: Wear chemical-resistant gloves, safety glasses with side shields. For large-volume handling, don chemical aprons and use boots with slip-resistant treads
Occupational Limits: Occupational exposure limits have not been clearly defined for polypropylene glycol, but staying below 10 mg/m3 airborne mist is a safe working target drawn from comparable polyethers
Hygiene Measures: Always wash hands and arms after handling, avoid eating or drinking near the product, and hang up spare clothing
Appearance: Clear, almost oily liquid; can form soft gels in chilly spaces
Odor: Nearly odorless or faintly sweet
Boiling Point: Wide range, typical polyols can pass 200°C
Melting Point: Can become soft solid below 10°C
Solubility: Freely mixes with water and alcohols
Specific Gravity: Ranges 1.0–1.1 at 20°C
Viscosity: Syrupy at room temperature due to the long polymer chains
Vapor Pressure: So low it almost vanishes at room temperature
Chemical Stability: Stays stable under ordinary storage and routine workplace conditions
Conditions to Avoid: Elevated heat, ignition sources, contact with strong acids or peroxides
Decomposition: Smoke, carbon monoxide, and carbon dioxide can come out when strongly heated
Reactivity: Won’t react under typical storage but combining with strong oxidizers or processing above 230°C risks breakdown
Acute Toxicity: Generally low for skin and oral routes, most direct animal data shows low rates of irritation or systemic harm
Chronic Exposure: Repeated skin exposure may lead to dryness, rare allergic reactions have turned up in journal reports
Carcinogenicity: Not listed by IARC, ACGIH, or OSHA
Other Effects: Shortness of breath or minor coughing in settings where mist collects, splash to eyes causes short-lived pain or redness
Aquatic Toxicity: Low compared to other synthetic chemicals, fish and daphnia tolerate modest concentrations
Persistence: Doesn’t break down quickly, so care around water sources matters
Bioaccumulation: Not expected, thanks to high water miscibility and tendency to dilute quickly
Wastewater Concerns: Large releases can stress local treatment systems, shame to let it seep into rivers or lakes
Disposal Method: Pump or soak up and deliver to chemical waste incinerators or treatment centers—never pour directly into sewers
Container Disposal: Rinse away remaining liquid, crush or puncture drums so scavengers can’t reuse
Legal Framework: Disposal falls under regional or national hazardous waste rules, always best to check with local authorities for specifics
UN Number: Not normally assigned since this material doesn’t fall into dangerous goods for road, air, or sea
Shipping Name: Polypropylene glycol, non-hazardous under road and air transport codes
Precautions: Seal containers tight, label for chemical transport, stack only as high as stable to prevent spills or leaks
Special Notes: Drivers and handlers need spill kits, especially in bulk shipments
Regulatory Status: Not classified as hazardous in many regions; chemical inventories in the United States, Europe, and Asia include it
Labeling Requirements: Basic chemical labeling: product identity, hazard statements if any, handling tips
Worker Protection: U.S. OSHA and European REACH standards call for risk assessment, communication, and PPE as practical
Community Right-to-Know: Reporting may be needed if handled in large volumes at factories, not at small workshops or labs
