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Product Name: 1,4-Pentadiene, Stabilized
Synonyms: Penta-1,4-diene, Divinylmethane
Chemical Formula: C5H8
CAS Number: 504-60-9
Recommended Use: Intermediate for organic synthesis, research, laboratory chemical
Manufacturer/Supplier: [Supplier information]
Emergency Contact: [Emergency phone number]
Classification: Flammable liquid (Category 2), Acute toxicity (Category 4, oral, dermal, inhalation), Skin irritation (Category 2), Eye irritation (Category 2A)
Label Elements: Danger symbol, Signal word: Danger, Hazard phrases: Highly flammable liquid and vapor, Causes skin and eye irritation, May cause respiratory irritation
Precautionary Statements: Keep away from ignition sources. Use explosion-proof equipment. Avoid breathing vapors. Wear protective gloves, clothing, and eye protection. Wash thoroughly after handling. Use outdoors or in well-ventilated areas only.
Other Hazards: May form explosive peroxides on prolonged storage. Vapors may cause drowsiness and dizziness. Exposure can aggravate existing skin and respiratory conditions.
Chemical Name: 1,4-Pentadiene
Concentration: ≥ 99%
Stabilizer: Traces of inhibitor (TBC or equivalent, approx. 10-50 ppm)
Impurities: Trace hydrocarbons (e.g. butadiene, pentene) may be present at negligible levels.
CAS Numbers: 504-60-9 (1,4-Pentadiene), 88-99-3 (TBC)
Inhalation: Move person to fresh air. Provide oxygen if breathing is difficult. Seek medical attention for respiratory symptoms such as coughing, wheezing, or dizziness.
Skin Contact: Remove contaminated clothing. Wash skin thoroughly with soap and water. Get medical advice if symptoms persist or irritation develops.
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses. Continue rinsing until irritation subsides. Seek immediate medical assistance if irritation persists.
Ingestion: Rinse mouth with water. Do not induce vomiting. Give water to drink if conscious. Immediate medical attention required.
Immediate/Delayed Effects: Rapid onset of respiratory or nervous system effects possible from high concentrations.
Suitable Extinguishing Media: Dry chemical powder, foam, carbon dioxide, water spray for larger fires
Unsuitable Extinguishing Media: Do not use a direct water stream, as this may spread fire
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, possibly irritant vapors
Specific Hazards: Highly flammable. Vapors heavier than air may travel and ignite at distant sources.
Protective Equipment: Self-contained breathing apparatus and full protective gear recommended for firefighters.
Advice: Cool containers with water spray to prevent rupture due to heat.
Personal Precautions: Evacuate non-essential personnel. Eliminate ignition sources. Use personal protective equipment, including gloves, eye protection, and respirator if required.
Environmental Precautions: Prevent further leakage or spillage if safe. Avoid entry to sewers, watercourses, or soil.
Methods for Clean-Up: Absorb small spills with inert, non-combustible material such as sand or vermiculite. Shovel into chemical waste containers. Cover larger spills with foam to reduce vapors. Ventilate the spill area thoroughly.
Disposal: Use licensed chemical waste disposal services as described in Disposal Considerations.
Special Measures: Use explosion-proof equipment during cleanup. Monitor air quality during remediation.
Handling: Handle only in well-ventilated areas. Ground and bond containers. Avoid contact with skin, eyes, and clothing. Do not eat, drink, or smoke during use. Open and handle container with care. Use spark-proof tools and explosion-proof equipment.
Storage: Store in a cool, dry, well-ventilated place. Keep tightly closed in original packaging. Segregate from oxidizers, acids, and ignition sources. Maintain storage temperature below 30°C. Protect from sunlight and humidity. Periodically check for peroxide formation and discard if peroxides are detected.
Other Precautions: Store away from incompatible materials and sources of static discharge. Label storage area clearly.
Occupational Exposure Limits: No specific OSHA/ACGIH exposure limits assigned to 1,4-Pentadiene. Use industry best practices and a local threshold of 1 ppm recommended.
Engineering Controls: Use explosion-proof local exhaust ventilation. Maintain eye wash and safety shower near work area. Enclose operations and provide adequate mechanical ventilation.
Personal Protection: Wear chemical-resistant gloves (nitrile or neoprene recommended), safety goggles, face shield, flame-retardant lab coat, and suitable respiratory protection (organic vapor cartridge or supplied-air respirator for high vapor concentrations).
Hygiene Measures: Launder work clothes regularly. Avoid skin contact. Wash hands thoroughly after handling.
Appearance: Clear, colorless to pale yellow liquid
Odor: Sweetish, gasoline-like
Odor Threshold: Not determined
pH: Not applicable
Melting Point: Less than -100°C
Boiling Point: 42–44°C
Flash Point: -17°C (closed cup)
Evaporation Rate: High
Flammability: Extremely flammable liquid and vapor
Vapor Pressure: Approximately 380 mmHg at 20°C
Vapor Density: 2.5 (air = 1)
Relative Density: 0.65 (water = 1)
Solubility: Insoluble in water, soluble in ethanol, ether
Partition Coefficient (n-octanol/water): Not available
Auto-Ignition Temperature: ~295°C
Decomposition Temperature: Data not available
Viscosity: Low
Chemical Stability: Stable with added inhibitor under recommended storage conditions. Unstable without stabilizer, tendency for peroxide formation.
Possible Reactions: Can react violently with strong oxidizers, acids, or bases. Polymerization possible without stabilizer, especially under heat or light exposure.
Conditions to Avoid: Heat, flames, sparks, UV light, and incompatible materials. Prolonged storage or contamination with incompatible materials increases risk.
Hazardous Decomposition Products: Burning may produce carbon oxides, hydrocarbons, potentially toxic gases.
Incompatibility: Strong oxidizing agents, halogens, peroxides, acids.
Exposure Routes: Inhalation, ingestion, skin and eye contact
Acute Toxicity: Oral LD50 (rat): 800-1200 mg/kg, Dermal LD50 (rabbit): >2000 mg/kg, Inhalation LC50 (rat, 4h): 10,000 ppm (estimated)
Symptoms: Coughing, headache, dizziness, skin redness, eye irritation, drowsiness
Skin/Eye Effects: Causes moderate to severe irritation, risk of chemical burns with prolonged contact.
Sensitization: Not known to cause allergic reactions.
Carcinogenicity: Not classified as carcinogen by IARC, ACGIH, NTP, OSHA.
Mutagenicity/Teratogenicity: No recorded mutagenic or teratogenic effects in animal studies.
Chronic Effects: Prolonged exposure may affect the central nervous system or liver function.
Aquatic Toxicity: Data indicates low to moderate toxicity to aquatic organisms (EC50 Crustacea: ~80 mg/L, 48h).
Persistence and Degradability: Degrades rapidly through photo-oxidation in the atmosphere. Biodegradability in water is moderate.
Bioaccumulative Potential: Log Pow >2 indicates some bioaccumulation may occur.
Mobility in Soil: High volatility leads to evaporation before significant leaching into soil or groundwater.
Other Hazards: Spills or improper disposal can cause fire and environmental hazards due to vapor formation.
Waste Disposal: Collect and contain material in sealed containers for hazardous waste disposal through licensed chemical disposal companies.
Contaminated Packaging: Dispose of empty containers as hazardous waste after triple rinsing. Follow local and federal regulations.
Precautions: Avoid discharge to drains, sewers, or waterways.
Recommended Methods: Incineration in a chemical incinerator equipped with afterburner and scrubber.
UN Number: UN 2457
Proper Shipping Name: 1,4-Pentadiene, stabilized
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: I (great danger)
Labels Required: Flammable liquid
Environmental Hazards: Not regulated as marine pollutant
Special Precautions: Keep away from heat, sparks, open flames during transport. Ensure containers are tightly sealed and upright.
TSCA: Listed on U.S. Toxic Substances Control Act inventory
SARA Title III: Not listed as extremely hazardous substance. Applies to general reporting.
OSHA Hazard Communication: Classified as hazardous.
WHMIS Classification (Canada): B2 (flammable liquid), D2B (toxic material causing other toxic effects)
REACH (EU): Registered substance
Other Regulations: Comply with regional/local chemical safety and use regulations.
