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Name: Propylene Glycol Monomethyl Ether
Chemical Formula: C4H10O2
Common Uses: This liquid finds a spot in paint thinners, industrial cleaners, and inks for printers. Its ability to dissolve both water-based and oil-based substances grabs attention in factories, workshops, and laboratories. The versatility of this solvent continues to attract demand across cleaning, automotive, and electronics industries.
Main Hazards: Breathing in high vapor concentrations brings irritation to eyes, nose, and throat. Direct skin contact, especially during spills or clean-up work, can result in dryness and redness. In confined or poorly ventilated zones, headache and nausea can show up after too much exposure. Fire risk rises around ignition sources due to flammability. Spilled liquid on floors increases slip accidents.
GHS Classification: Flammable liquid (Category 3); causes eye irritation (Category 2A); may cause drowsiness or dizziness.
Notable Symptoms: Dizziness, eye redness, coughing, lightheadedness.
Component: Propylene Glycol Monomethyl Ether
Chemical Identity: 1-Methoxy-2-propanol
CAS Number: 107-98-2
Concentration: Usually above 98%. Tiny amounts of stabilizers can exist in certain formulations.
Inhalation: Remove the person to fresh air. Help them calm their breathing and loosen any tight clothing. If dizziness or headaches linger, seek medical advice right away.
Skin Contact: Rinse thoroughly with water and mild soap. Take off contaminated clothes. Watch for persistent irritation.
Eye Contact: Hold eyelids apart and flush gently with clean water—keep this up for at least 15 minutes. If the burning or stinging does not ease up, get help from a health professional.
Ingestion: Rinse the mouth. Don't drink fluids to dilute unless instructed by medical staff. In serious cases, reach out for professional medical help.
Suitable Extinguishing Media: Use alcohol-resistant foam, dry chemical, or carbon dioxide. Water spray can knock down fumes, but direct water jets spread the burning liquid.
Hazardous Combustion Products: Carbon monoxide and carbon dioxide can form during a fire. These gases pose health dangers for response crews.
Advice for Firefighters: Wear self-contained breathing apparatus and full protective clothing. Cool containers from a safe distance to prevent pressure build-up and possible explosions.
Fire Risks: Vapors flow downhill—ignition can easily happen away from a spill, especially around pilot lights or electrical tools.
Personal Precautions: Evacuate the area if the vapor is strong or if fire risk is present. Limit entry to essential personnel wearing appropriate protective equipment.
Environmental Precautions: Keep spilled substance out of drains, surface water, and soil—clean-up needs prompt attention to reduce environmental harm.
Methods for Cleanup: Absorb spills with inert materials like sand or commercial absorbent pads, place in containers for proper disposal. Wash spill area with plenty of water once bulk liquid is picked up.
Ventilation: Air out the space to help dissipate lingering vapors.
Safe Handling: Wear gloves and splash protection for eyes. Work with this solvent only in well-ventilated spaces to prevent fume build-up. Avoid breathing in the vapor directly.
Storage: Keep tightly sealed in corrosion-resistant containers, away from heat, sparks, and open flames. Secure in a cool area with reliable fire protection systems. Store separate from strong oxidizers or acids that can trigger unwanted reactions.
Preventative Measures: Train staff to recognize and handle risks. Post signs and keep spill clean-up kits nearby.
Occupational Limits: National and local agencies set limits such as 100 ppm (TWA) to reduce health risks among workers. Short, high concentrations call for extra care.
Engineering Controls: Mechanical ventilation or fume hoods get rid of vapor pockets and improve indoor air quality. Closed handling systems protect both workers and bystanders.
PPE: Gloves (nitrile, neoprene), tight-fitting goggles, long-sleeve aprons. In high vapor or spill scenarios, use organic vapor respirators as added protection.
Work Practices: Wash hands after use and avoid touching face. Change dirty work clothes promptly.
Appearance: Clear, colorless liquid
Odor: Light, ether-like (sweet)
Boiling Point: Around 120 °C
Melting Point: Not applicable since it stays liquid at routine workplace temperatures
Flash Point: Roughly 31–33 °C (closed cup)
Explosive Limits: Lower: about 1.5%, Upper: about 13% in air
Solubility: Mixes well with water
Vapor Pressure: Moderate; higher temperatures drive up vapor output
Evaporation Rate: Faster than water, slower than most acetates
Chemical Stability: Stays stable under standard use and storage away from heat and sources of ignition.
Incompatible Materials: Steer clear of strong acids, bases, and oxidizers—mixing can lead to exothermic or hazardous reactions.
Hazardous Decomposition: Excessive heating can produce toxic vapors such as carbon monoxide.
Hazardous Polymerization: Not expected under everyday conditions.
Exposure Risks: Short-term exposure can irritate eyes, nose, and airways. Prolonged skin exposure dries or cracks the skin. Workers who breathe in too much vapor over long shifts may experience headaches, dizziness, and fatigue.
Acute Effects: Eyes and respiratory tract respond the quickest—burning, watering, coughing. Oral exposure in animals shows low toxicity, but practical workplace exposure usually comes by skin or inhalation.
Chronic Effects: No evidence links this solvent to cancer, but repeated overexposure ramps up chances of liver or kidney impacts (mostly documented in animal testing).
Sensitization: Shows little tendency to trigger allergies compared to harsher industrial solvents.
Aquatic Risks: Spills into water streams carry danger for fish or tiny organisms by reducing oxygen present in the water. Most solvents like this evaporate fast, but large leaks overwhelm local water treatment systems.
Soil Risks: Leaching into soil can speed up the movement of other pollutants. Broken-down products from sunlight do not linger a long time and break up into smaller, less hazardous pieces.
Bioaccumulation: This chemical does not build up in plants or animals as much as heavier industrial toxins, but it still calls for vigilance.
Degradability: In water and open air, bacteria rapidly chew through smaller amounts.
Disposal: Take used or contaminated solvent to qualified hazardous waste facilities. Never pour it down sinks, storm drains, or the street. Liners and gloves soiled in clean-up should head for sealed waste containers for later collection.
Recycling: For workplaces with high solvent use, local programs offer collection and treatment for safe recycling into industrial-grade fluids.
Regulations: Pay attention to regional waste codes and rules, as unapproved disposal can bring penalties and environmental damage.
UN Number: Classified as dangerous goods for road, rail, air, or sea transport under chemical safety codes.
Packing: Use guards and secondary containment during shipping to prevent container breakage or spill.
Labeling: Boxes and drums need clear flammable liquid warnings—this chemical’s boiling and flash point means accidents during transit can escalate.
Storage During Transport: Keep packages upright—tie down containers and shield them from direct sun or heat during loading.
Applicable Laws: Various national work safety and chemical control rules demand hazard communication through labels and workplace postings. GHS and OSHA in the U.S., REACH in Europe, and similar global systems treat propylene glycol monomethyl ether as a regulated material.
Reporting Requirements: Large spills, air releases, or workplace incidents require quick reporting to environmental and occupational safety authorities.
Worker Training: Workers in manufacturing and chemical management roles get specialized safety education, including annual refreshers, to keep up with rules and address emergency scenarios.
