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Chemical Name: 1-Pentene
Synonyms: Alpha-pentene
Chemical Formula: C5H10
Molecular Weight: 70.13 g/mol
Appearance: Clear, colorless liquid with a mild gasoline-like odor
Uses: Common in organic synthesis, polymer production, and as a chemical intermediate
GHS Classification: Flammable liquid, Category 2
Main Hazards: High flammability, vapor/air mixtures can ignite explosively
Health Hazards: Inhalation triggers headaches, dizziness, or respiratory irritation; high concentrations may cause central nervous system effects
Environmental Hazards: Toxic to aquatic organisms with the potential for long-term harm in water environments
Warning Symbols: Flame, exclamation mark
Signal Word: Danger
Component: 1-Pentene
Concentration: Typically above 95%
Impurities: Minor alkenes and alkanes from production processes can appear as trace contaminants, usually not listed above 1%
Inhalation: Remove person to fresh air, provide oxygen if breathing is difficult, call for medical help
Skin Contact: Rinse skin thoroughly with soap and water, remove contaminated clothing
Eye Contact: Flush eyes gently with water for at least fifteen minutes, seek medical attention for irritation or pain
Ingestion: Rinse mouth, do not induce vomiting, seek immediate medical care
Information for Doctors: No specific antidote, supportive treatment based on symptoms
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam; avoid water jets on fires involving dense vapors
Fire Hazards: Vapors are heavier than air and can travel to sources of ignition
Protective Equipment: Self-contained breathing apparatus and full protective gear
Special Precautions: Containers exposed to fire may rupture from pressure build-up; cool them with water spray
Decomposition: Burning unleashes carbon monoxide, carbon dioxide, possibly toxic hydrocarbons
Personal Protection: Shut off ignition sources, ventilate area, wear appropriate chemical-resistant gloves and goggles
Containment: Dike and soak up spilled liquid with inert material like sand or vermiculite
Cleanup: Gather contaminants in sealed containers for disposal; avoid letting into drains
Precautions for Environment: Prevent from spreading to waterways or soil, pay attention to runoff and storm drains
Handling: Keep away from open flame or sparks, work only with explosion-proof equipment in well-ventilated spaces
Storage: Store in tightly closed, properly labeled containers in a cool, dry, well-ventilated spot
Incompatible Materials: Strong oxidizers, acids, halogens, avoid storage near heat sources
Other Practices: Ground and bond containers during transfers to static build-up, handle only with chemical-safe gloves and goggles
Control Parameters: Occupational exposure limits by OSHA and ACGIH are not well established for 1-pentene, but safe handling practices suggest using tightly closed systems and local exhaust
Engineering Controls: Work in fume hoods or ventilated spaces, keep air concentration low to minimize inhalation risk
PPE for Skin/Eyes: Wear gloves from nitrile or neoprene, splash-resistant goggles or face shields
Respiratory Protection: Use NIOSH-approved organic vapor respirators for high vapor concentrations or spill situations
Industrial Hygiene: Wash hands after handling, avoid eating or drinking around chemicals, regular monitoring of air can catch leaks early
Boiling Point: About 30°C – 36°C
Melting Point: -138°C
Flash Point: About -51°C
Vapor Pressure: High at room temperature
Density: Roughly 0.64 g/mL
Solubility: Almost insoluble in water, mixes well with most organic solvents
Odor: Light gasoline or petroleum-like smell
Stability: Unstable under heat, forms explosive mixtures with air
Chemical Stability: Stable only under recommended conditions; decomposes with heat, sparks, flames
Reactive With: Strong oxidizing agents, halogens, acids
Polymerization Risk: May polymerize with acids or peroxides
Hazardous Byproducts: Carbon monoxide, carbon dioxide, possibly hazardous hydrocarbons if degraded
Acute Toxicity: Data on human exposure remains limited, but studies suggest irritation to eyes, respiratory and nervous systems
Chronic Exposure: No clear correlation with long-term illness, though repeated high exposures could increase risk for organ effects
Routes of Entry: Mainly inhalation, skin contact
Symptoms: Drowsiness, dizziness, skin dryness, eye or throat irritation
Other Effects: No strong evidence for carcinogenicity or genetic toxicity in humans based on available data
Ecotoxicity: Short-term aquatic toxicity can harm fish and invertebrates; potential for long-lasting impacts if released in large spills
Persistence: Does not last long in air, degrades quickly, but may persist in groundwater
Bioaccumulation: Unlikely to accumulate in the food chain due to volatility and low water solubility
Disposal Risks: Not safe for routine release to water bodies, takes extra effort to control runoff and fumes in emergency scenarios
Preferred Disposal: Send to licensed waste treatment facilities specializing in hazardous organic liquids
Precautions: Ensure containers are empty and flushed before recycling or landfill, avoid incinerating unchecked
Prohibited Disposal: Never pour down the drain, sewer, or onto open ground to avoid groundwater and atmospheric contamination
Recycling: Can be considered for chemical recovery where feasible, though specialized processing is necessary
Proper Shipping Name: 1-Pentene
Hazard Class: 3 (Flammable liquids)
UN Number: UN 1265
Packing Group: II
Transport Precautions: Keep containers upright, secure during travel, and mark with proper hazard signage; spill kits and fire extinguishing material should always be within reach during shipment
OSHA Status: Considered hazardous under US workplace safety rules
EPA Listing: Controlled as a volatile organic compound; accidental releases above threshold quantities must be reported
SARA Title III: Classified as a hazardous chemical, reporting required for certain quantities
Other Laws: Restrictions, labeling rules, and emergency planning requirements may differ across regions, but in many states, 1-pentene falls under strict handling rules for flammable solvents
