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Chemical Name: 1,3-Propylene Glycol Butyl Ether
Synonyms: Butoxypropanol, Propylene Glycol Monobutyl Ether
Chemical Formula: C7H16O2
CAS Number: 5131-66-8
Typical Uses: Solvent in cleaning formulations, coatings, inks, and pesticides. Found across factories, workshops, and even in janitorial closets at schools and hospitals. People handling this material should recognize its industrial roots and its tendency to show up in seemingly everyday places.
Acute Health Hazards: Causes eye irritation, sometimes significant if splashed. Can provoke mild skin irritation after repeated contact. Inhalation at high concentrations might cause headaches, dizziness, and respiratory tract irritation.
Chronic Health Hazards: Prolonged contact sometimes leads to dermatitis. Studies highlight toxicity at high exposure, but usual risks come from careless handling.
Hazard Statements: Flammable liquid and vapor. Harmful if swallowed. May cause respiratory irritation.
Main Component: 1,3-Propylene Glycol Butyl Ether, typically at concentrations above 98%.
Impurities: Water or related glycols might appear as residues. Data suggests low concern unless purity is grossly compromised.
Eye Contact: Flush eyes with running water for at least 15 minutes. Remove contact lenses if present.
Skin Contact: Wash affected skin area thoroughly with soap and water. Discard contaminated clothing.
Inhalation: Move person to fresh air. Seek medical attention if breathing becomes difficult.
Ingestion: Rinse mouth with water. Do not induce vomiting. Medical oversight is vital; complications from accidental drinking almost always demand observation.
Suitable Extinguishing Media: Use water spray, foam, dry powder, or carbon dioxide. Approach fires with care, as vapors can ignite quickly.
Fire Hazards: Vapors form explosive mixtures with air. Risk grows in poorly ventilated spaces. Thermal decomposition sometimes releases hazardous fumes.
Protective Equipment: Firefighters use self-contained breathing apparatus and full protective clothing.
Personal Precautions: Proper gloves, goggles, and protective clothing shield skin and eyes. Those cleaning up spills must ventilate the area and avoid inhalation.
Spill Cleanup: Soak up liquid with inert material—sand or earth works well. Gather residue in sealed containers for disposal. Surfaces washed with water reduce residue but need responsible wastewater management.
Environmental Precautions: Blocking the chemical from drains, soil, and waterways matters, as even small amounts result in local water contamination.
Safe Handling: Keeping the chemical away from sparks, flames, and hot surfaces staves off dangerous accidents. Handling in well-ventilated areas always takes top priority.
Storage Recommendations: Store in tightly closed containers in cool, dry places. Direct sunlight and incompatible substances (strong oxidizers and acids) increase risk. Chemical storage policies at facilities must address periodic inspection and labeling for life-cycle traceability.
Engineering Controls: Local exhaust ventilation or general room ventilation provides effective risk reduction.
Personal Protective Equipment: Workers benefit from chemical-resistant gloves, safety goggles, lab coats, and respiratory protection when airborne levels climb.
Exposure Limits: Many jurisdictions assign occupational exposure limits (OEL), with thresholds that change as research develops. Worker health monitoring makes the difference in preventing overexposure.
State: Clear, colorless liquid
Odor: Mild ether-like scent, some describe it as slightly sweet.
Boiling Point: Approximately 170°C
Melting Point: Data points to low freezing points, which lines up with typical glycol ethers.
Flash Point: Around 68°C (closed cup), marking increased fire potential in heated conditions.
Solubility: Miscible with water and organic solvents.
Vapor Pressure: Low at room temperature, but can rise in heat.
Chemical Stability: Stable under normal usage, but breaks down under extreme temperature or strong oxidizers.
Reactivity Hazards: Reacts with strong acids and oxidizing agents, producing heat or hazardous byproducts.
Hazardous Decomposition Products: Combustion or heating can release carbon monoxide, carbon dioxide, and sometimes irritating aldehydes.
Routes of Exposure: Contact comes by inhalation, skin absorption, ingestion, or eye contact.
Acute Effects: Most cases report mild toxicity, eye and respiratory irritation, transient headaches.
Chronic Effects: Animal studies show potential for liver or kidney changes at high doses, but workplace exposure rarely reaches those levels if proper safety measures prevail.
Carcinogenicity: Not listed by IARC, NTP, or OSHA among known human carcinogens.
Aquatic Toxicity: Fish and aquatic invertebrate toxicity remains moderate, with higher concentrations affecting local biota in confined spills.
Biodegradability: 1,3-Propylene Glycol Butyl Ether generally breaks down in the environment, though not instantly—posing persistent risk in slow-moving streams or soil.
Bioaccumulation Potential: Studies show limited potential for bioaccumulation, but even moderate persistence makes environmental stewardship important.
Special Concerns: Avoiding release into surface waters preserves ecosystem health for local communities.
Industrial Waste Disposal: Residues and contaminated absorbents should go to approved hazardous waste handlers.
Drain Disposal: Pouring down the drain without treatment is not acceptable—risk to municipal water supplies demands collection and processing through professionally managed systems.
Recycling: Solvent recovery and reuse possible in some facilities with proper distillation equipment.
Classification: Shipped as a combustible liquid, requiring suitable labeling.
Packing Instructions: Use tightly sealed containers, check compatibility with transportation materials.
Additional Handling: Freight regulations dictate that trucks and ships carrying this material observe all hazardous materials protocols, including placards and manifest documentation, to safeguard logistics workers and emergency responders.
Workplace Regulations: Many countries regulate glycol ethers under workplace safety laws, requiring the maintenance of updated Safety Data Sheets, hazard communication, and exposure monitoring.
Environmental Regulations: Water discharge, chemical storage, and air quality controls may apply through local and national laws.
Right-to-Know Laws: Disclosure of hazardous components empowers workers, nearby residents, and emergency teams to respond quickly in accidents.
