Product Name: Propylene Glycol Butyl Ether
Chemical Formula: C7H16O2
Other Names: 1-Butoxy-2-Propanol, PnB, Dowanol PnB
CAS Number: 5131-66-8
Recommended Use: Solvent for industrial cleaning, coatings, inks, and paints
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Emergency Telephone: [24-hour emergency number connected to transportation and chemical spill advice]
Synonyms: Propylene Glycol Monobutyl Ether, 2-Butoxy-1-Propanol
UN Number: Not regulated under current guidelines for road/rail or sea transport
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GHS Classification: Eye Irritation Category 2
Signal Word: Warning
Hazard Statements: Causes serious eye irritation; may be harmful if swallowed or inhaled; prolonged exposure may cause skin dryness or cracking
Pictograms: Exclamation Mark
Routes of Entry: Eyes, skin, inhalation, ingestion
Symptoms of Exposure: Redness, tearing, or burning sensation in eyes; headache, dizziness, nausea if overexposed through inhalation; skin contact can lead to irritation and dryness
Target Organs: Eyes, skin, respiratory and digestive tract
Safety Precautions: Avoid breathing vapors; use in well-ventilated areas; wear suitable protective gear
Environmental Hazards: Large spills may affect aquatic life, especially if runoff reaches waterways
Chemical Name: Propylene Glycol n-Butyl Ether
Concentration: 99% minimum
CAS Number: 5131-66-8
Impurities: Water (trace), residual starting materials (trace), no hazardous impurities at relevant concentrations
Stabilizing Additives: None required for normal shelf life
Formulation Notes: Delivered as a clear, colorless to pale yellow liquid; not sold in a mixture or with adulterants; multi-purpose solvent in original purity grade
Other Identifiers: EINECS: 225-878-4
REACH Registration: Pre-registered
Inhalation: Remove from exposure, move to fresh air immediately; provide oxygen if breathing is difficult; seek medical help for symptoms like dizziness, headache, or nausea
Skin Contact: Remove contaminated clothes, rinse affected area with plenty of water; use mild soap; seek medical assistance if irritation or redness develops and persists
Eye Contact: Flush eyes with water for at least 15 minutes; remove contact lenses if present and easy to do; call a healthcare provider in case of persistent discomfort
Ingestion: Rinse mouth, drink water; do NOT induce vomiting unless instructed by medical personnel; contact poison control or go to a health facility
Most Important Symptoms: Eye irritation, skin dryness, gastrointestinal upset on ingestion; medical observation may be needed in severe inhalation cases
Recommendations to Physician: Treat symptomatically; monitor for respiratory distress and secondary infections in cases of significant exposure
Suitable Extinguishing Media: Water spray, carbon dioxide, dry chemical, alcohol-resistant foam
Unsuitable Extinguishing Media: Direct water jet (may spread the chemical)
Specific Hazards: Vapors may form explosive mixtures with air at elevated temperatures; thermal decomposition emits carbon monoxide and carbon dioxide
Firefighting Procedures: Isolate area, remove people at risk; wear full bunker gear and self-contained breathing apparatus
Protective Equipment: Firefighters should use standard protection against chemical fires; ventilate after suppression
Combustion Products: Carbon oxides, possibly unidentified organic compounds
Other Information: Keep containers cool with water spray; prevent runoff from firefighting from entering drains or water sources
Personal Precautions: Use appropriate personal protective equipment such as gloves, goggles, and respirator if ventilation is inadequate
Environmental Precautions: Contain spill to prevent it from spreading to drains, surface, or ground water; inform proper authorities if large quantities enter waterways
Methods for Clean Up: Absorb small spills with inert material such as sand, earth, or commercial absorbent; sweep up and place in chemical waste container; clean area thoroughly with water
Large Spill Handling: Dike the area, prevent spread, call trained emergency responders
Decontamination: Wash spill site after pickup, especially if in a workplace with sensitive environments like food processing
Waste Disposal: Follow local regulations for hazardous waste; do not dispose of in normal trash or wash down sink
Handling: Use only with adequate ventilation; avoid breathing vapors or direct contact with skin and eyes; wash thoroughly after handling; keep away from sources of heat and open flame; never eat, drink, or smoke in areas where the chemical is being used
Storage: Store in tightly closed, labeled containers; keep in a cool, dry, well-ventilated place away from strong oxidizers, acids, and bases; segregate from foods and incompatible materials; avoid sunlight exposure to prevent product breakdown
Industrial Practices: Maintain proper labeling and safety signage; use drum pumps or closed transfer systems where possible; rotate stock and use on a first-in, first-out basis
Other Notes: Prevent static discharge with grounding and bonding during transfer
Exposure Limits: No official OSHA or ACGIH limits for this substance, but recommend keeping airborne concentrations as low as possible with engineering controls
Engineering Controls: Use local exhaust or general ventilation to keep vapors below any applicable limit; install eyewash stations and emergency showers where large quantities are handled
Personal Protection: Wear chemical safety goggles, impervious gloves (nitrile or neoprene preferred), and suitable protective clothing; for spills or high vapor concentrations, use NIOSH-approved respirators
Hygiene Measures: Wash hands and face before breaks and after handling; remove contaminated clothing and wash before reuse
Monitoring: Regular workplace air quality checks help ensure exposures stay low
Appearance: Clear colorless to pale yellow liquid
Odor: Mild ether-like scent
Odor Threshold: Detectable at low concentrations
pH: Not applicable (non-aqueous)
Melting Point/Freezing Point: About -65°C (-85°F)
Boiling Point/Range: 171–174°C (340–345°F)
Flash Point: 66°C (151°F) closed cup
Evaporation Rate: Slower than butyl acetate
Flammability: Can burn if heated above flash point
Vapor Pressure: 0.3 mmHg at 20°C
Vapor Density: 4.6 (air=1)
Relative Density: 0.88 (water=1)
Solubility: Mixes well with water; soluble in most organic solvents
Partition Coefficient (n-octanol/water): log Kow 0.56
Auto-Ignition Temperature: 230°C (446°F)
Decomposition Temperature: Above 200°C can break down to hazardous products
Viscosity: 3.6 mPa·s at 25°C
Chemical Stability: Remains stable under normal storage conditions
Possibility of Hazardous Reactions: Reacts with strong oxidizing substances; may form peroxides if exposed to air and light over long periods
Conditions to Avoid: Heat, sparks, flames, direct exposure to ultraviolet light
Incompatible Materials: Strong acids, strong bases, oxidizing agents, certain plastics may soften
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, possibly small amounts of hydrogen gas in a fire or extreme heating
Polymerization: Product does not spontaneously polymerize
Acute Toxicity: Oral LD50 in rats: ~3,300 mg/kg; dermal LD50 in rabbits: >2,000 mg/kg; inhalation toxicity is low at workplace exposure levels over normal working shifts
Skin Corrosion/Irritation: May cause moderate, reversible skin irritation in sensitive individuals with prolonged contact
Serious Eye Damage/Irritation: Causes significant eye irritation, typically resolves with prompt rinsing
Respiratory Sensitization: No evidence of respiratory sensitization
Skin Sensitization: Sensitization uncommon; users with frequent exposure recommend regular glove use
Carcinogenicity: No confirmed cancer risk in humans or animal studies
Reproductive Toxicity: Not expected at normal exposure levels; animal studies show no significant reproductive risk
Mutagenicity: No significant effects detected in genotoxicity studies
Other Health Effects: High vapor concentrations may cause headache, dizziness, sedation
Ecotoxicity: Moderately toxic to aquatic organisms; LC50 (fish, 96h): ~841 mg/l; EC50 (daphnia, 48h): ~1919 mg/l
Persistence and Degradability: Readily biodegradable under aerobic conditions; no significant build-up in environment
Bioaccumulation: Unlikely due to low log Kow
Mobility: High mobility in soil and water due to good solubility
Other Effects: Large volume spills may contribute to oxygen depletion in water bodies, so avoid dumping in bulk
Aquatic Toxicity: Protect stormwater and avoid washing into rivers or lakes
Waste Disposal: Dispose of through licensed hazardous waste contractors using methods approved by local authorities
Container Disposal: Containers should be triple-rinsed, then punctured and sent to licensed drum reconditioners; never re-use for other chemicals
Recommended Disposal Methods: Incinerate in chemical incinerator equipped with afterburner and scrubber
Precautions: Wear PPE while disposing of residues; avoid dust and vapor exposure even during waste handling
Environmental Notes: Do not release into the environment, drains, or sewers; report significant spills as per local regulations
UN Number: Not regulated as a dangerous good under current transport regulations for most regions
Proper Shipping Name: Propylene Glycol n-Butyl Ether
Transport Hazard Classes: Not classified as hazardous for land, air, or sea
Packing Group: Not applicable
Environmental Hazards: Not a marine pollutant
Special Precautions: Keep away from food products during transport; secure load to prevent tipping or breakage during transport
Label Requirements: Standard chemical label, no special placards required
TSCA Status: Listed on US Toxic Substances Control Act (TSCA) Inventory
REACH: Registered in accordance with European REACH regulations
OSHA: Not specifically listed as hazardous; covered by HazCom for eye and skin irritation warning
Other Regulations: No SARA 313 reporting requirements; not on California Proposition 65 list
Labeling Requirements: GHS label required with appropriate H and P phrases for eye irritation; manufacturers must ensure compliance with chemical safety standards
Regional Restrictions: No special restrictions known at present, but always check regional and national regulations for updates
Workplace Controls: Must provide SDS to workers handling the substance per regulatory acts
