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Product Name: 1,3-Pentadiene, Stabilized
Synonyms: Piperylene, 1,3-Divinylmethane
Chemical Formula: C5H8
CAS Number: 504-60-9
Recommended Uses: Industrial applications, chemical synthesis, polymer production
Supplier Details: Full address, emergency phone number, company contact information supplied by the manufacturer
Emergency Contact: For emergency response, a specialized hazardous materials team or local fire department
GHS Classification: Flammable liquid (Category 2), Acute toxicity - inhalation and skin (Category 4), Skin irritation (Category 2), Eye irritation (Category 2), Specific target organ toxicity - single exposure (Category 3, narcotic effects)
Signal Word: Danger
Hazard Statements: High fire risk; mild to severe skin and eye irritation; inhalation may cause headaches, dizziness, drowsiness; repeated or prolonged exposure can cause organ effects
Pictograms: Flame, exclamation mark
Precautionary Statements: Keep away from heat, sparks, open flames; avoid breathing vapors; wear protective gloves, eye and face protection; use only outdoors or in well-ventilated areas; wash thoroughly after handling
Routes of Exposure: Skin, inhalation, eyes, ingestion
Hazard Overview: Highly flammable, forms explosive mixtures with air, irritating to eyes, respiratory and skin systems, can affect central nervous system at high concentrations, may cause headaches, nausea, drowsiness, or loss of coordination
Chemical Name: 1,3-Pentadiene
Common Name: Piperylene
Content: Approximately 99%
Stabilizing Additives: Usually contains small amounts (e.g., 0.1% or less) of polymerization inhibitors such as tert-butylcatechol
Impurities: Residual hydrocarbons, minor isomeric dienes, trace polymerization products
Inhalation: Move affected person to fresh air immediately; check for breathing difficulties; if breathing is irregular or stopped, perform CPR and seek urgent medical assistance; monitor for dizziness, headache, or nausea
Skin Contact: Remove contaminated clothing; wash skin thoroughly with soap and water for at least 15 minutes; seek medical advice for persisting irritation
Eye Contact: Rinse cautiously with water for several minutes, lifting upper and lower eyelids occasionally; remove contact lenses if present and easy; seek medical attention if irritation persists
Ingestion: Rinse mouth; do not induce vomiting; keep person at rest and get immediate medical help
Most Important Symptoms/Effects: Feelings of drowsiness, dizziness, headache, skin and eye redness, nausea from inhalation
Notes for Physicians: Treat symptomatically; monitor respiratory and cardiovascular functions; risk of chemical pneumonitis from aspiration
Suitable Extinguishing Media: Use dry chemical, foam, or CO₂; avoid straight water streams that could spread the fire
Unsuitable Extinguishing Media: Direct water jets
Specific Hazards: Vapors form explosive mixtures with air; containers may explode under fire conditions; produces toxic fumes including carbon monoxide, carbon dioxide
Firefighting Instructions: Evacuate area, wear self-contained breathing apparatus and full protective gear; use water spray to cool exposed containers; contain run-off to prevent environmental contamination
Flash Point: About -39°C (-38°F) (closed cup)
Explosion Hazards: Vapors heavier than air; may travel along ground and flash back to source
Personal Precautions: Wear chemical-resistant gloves, goggles or face shield, flame-retardant clothing, suitable respirator
Emergency Procedures: Evacuate area, ventilate closed spaces, eliminate all ignition sources, prevent entry of vapors into buildings
Spill Response: Cover drains; contain spill with non-combustible absorbent (sand, earth, vermiculite); collect leaking liquid in sealable, non-sparking containers; use explosion-proof equipment
Environmental Precautions: Prevent spillage from entering drains, sewers, waterways, or soil; notify authorities if contamination occurs
Cleanup Methods: Cover with inert material, collect mechanically, dispose of safely, wash spill site after material pickup
Handling: Keep away from ignition sources such as open flames, sparks, static discharge; use non-sparking tools and explosion-proof equipment; avoid inhaling vapors and skin contact; ground and bond containers during transfer
Storage: Store in tightly sealed, properly labeled containers; keep in a cool, well-ventilated area away from direct sunlight, oxidizers, acids; use only approved, fire-resistant materials for storage vessels
Temperature Conditions: Recommended storage under 25°C; never subject to freezing or excessive heat
Special Precautions: Install local exhaust or ventilation; provide designated flammable storage areas; inspect regularly for leaks and corrosion; segregate from incompatible materials (oxidizers, strong acids, alkalis)
Occupational Exposure Limits: OSHA Permissible Exposure Limit (PEL) 5 ppm (17 mg/m³) TWA (as piperylene); ACGIH TLV: 5 ppm TWA
Engineering Controls: Use in closed systems or with local exhaust ventilation to keep airborne concentrations below recommended limits; explosion-proof ventilation required
Personal Protective Equipment: Chemical-resistant gloves (e.g., nitrile); safety goggles; flame-retardant antistatic clothing; appropriate NIOSH-approved respirator for airborne concentrations
Hygiene Measures: Wash hands, face, and exposed skin thoroughly after handling; no smoking, eating, or drinking in area; remove and clean contaminated clothing before reuse
Environmental Protection: Install appropriate containment and recovery systems; monitor air quality in work area
Appearance: Colorless to light yellow liquid
Odor: Mild gasoline-like smell
Odor Threshold: Detectable at concentrations below occupational limits
pH: Not applicable
Melting Point/Freezing Point: Approx. -145°C (-229°F)
Boiling Point: 42°C (108°F)
Flash Point: Approx. -39°C (-38°F)
Evaporation Rate: Very fast
Flammability: Highly flammable liquid and vapor
Vapor Pressure: 270 mmHg at 20°C (68°F)
Vapor Density: 2.1 (air = 1)
Relative Density: 0.679 g/cm³ at 20°C
Solubility: Slightly soluble in water; soluble in most organic solvents
Partition Coefficient n-octanol/water: log Kow ~2.9
Auto-ignition Temperature: 320°C (608°F)
Decomposition Temperature: Not determined
Viscosity: Low, easy to dispense and blend
Explosive Limits: Lower: 1.6% vol; Upper: 9.3% vol in air
Chemical Stability: Stable under recommended storage and handling conditions; susceptible to polymerization without stabilizer
Conditions to Avoid: Heat, open flames, sparks, electrostatic discharge, direct sunlight
Materials to Avoid: Strong acids, strong oxidizing agents, peroxides, alkalis
Hazardous Decomposition Products: On combustion produces carbon monoxide, carbon dioxide, irritating and toxic fumes
Possibility of Hazardous Reactions: Violent polymerization if stabilizer is depleted or material is heated excessively; forms explosive mixtures with air
Polymerization: May occur due to heat, contamination, or loss of inhibitor; risk of vessel rupture if polymerization is in a closed system
Likely Routes of Exposure: Inhalation, skin, eyes, ingestion
Acute Toxicity: LD50 (oral, rat) ~1800 mg/kg; LC50 (inhalation, rat) ~66,000 mg/m³ (4 hr)
Skin Corrosion/Irritation: Causes moderate skin irritation
Serious Eye Damage/Irritation: Causes eye irritation; possible redness, watering
Respiratory Effects: Causes dizziness, drowsiness, headaches, possible narcotic effects at high concentrations
Chronic Effects: May affect the central nervous system with repeated exposure; prolonged contact can cause dermatitis
Mutagenicity/Carcinogenicity: Not listed as carcinogenic by IARC, NTP, or OSHA; limited information available
Other Data: Not expected to cause sensitization or reproductive toxicity at typical exposure levels
Toxicity to Aquatic Life: Harmful to aquatic organisms at elevated concentrations; LC50 (fish, 96hr) ~10-100 mg/L
Persistence and Degradability: Readily biodegradable in the environment; will volatilize rapidly if released
Bioaccumulation Potential: Low to moderate (log Kow ~2.9); unlikely to accumulate in aquatic organisms
Mobility in Soil: High volatility and low water solubility indicate movement through soil as vapor; rapidly evaporates
Other Adverse Effects: High concentrations displace oxygen in confined spaces; ozone formation potential in atmosphere
Material Disposal: Dispose of according to local, state, and federal regulations; incinerate in approved facility; do not discharge to sewer or environment
Container Disposal: Empty containers may contain flammable residues and vapors; ensure complete and proper cleaning; dispose in accordance with hazardous waste guidelines
Recommended Handling for Disposal: Segregate from incompatible waste materials; label and seal securely; transport only by licensed hazardous materials handler
UN Number: UN 2046
UN Proper Shipping Name: Pentadienes, stabilized
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: I
Marine Pollutant: Not classified as marine pollutant by IMDG
Label Required: Flammable liquid
Special Precautions for Transport: Seal tightly, keep upright; segregate from oxidizing substances; transport in ventilated area or closed vehicle; comply with local, national, and international regulations concerning flammable chemicals
Emergency Response Guide: ERG Number 128
Classification under OSHA: Hazardous chemical, flammable liquid category 2
TSCA Status: Listed in US Toxic Substances Control Act (TSCA) Inventory
SARA Title III: Section 302: Not extremely hazardous; Section 313: Not subject to reporting
California Proposition 65: Not listed as causing cancer, birth defects, or other reproductive harm
Additional Regulations: Subject to workplace control under WHMIS (Canada), REACH (EU); regulations may differ depending on local jurisdiction; check state, provincial, or national standards for additional labeling or handling requirements
