© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Chemical Name: 1,3-Pentadiene
Synonyms: piperylene, 1,3-divinyl methane
CAS Number: 504-60-9
Molecular Formula: C5H8
Appearance: colorless, flammable liquid with a gasoline-like odor
Intended Uses: manufacture of plastics, resins, adhesives, and sometimes in organic synthesis
Hazard Classification: flammable liquid and vapor, skin irritant, eye irritant, possible respiratory irritant
Signal Words: Danger
Hazard Statements: causes skin and eye irritation, may cause respiratory discomfort, may form explosive mixtures with air
Health Risks: exposure can lead to symptoms such as dizziness, headache, nausea, skin redness, or eye discomfort — repeated exposure without protection can hurt lungs and skin
Fire Risks: low flash point, ignites easily in the presence of spark or flame, vapors travel far and reach ignition sources, can result in flashback fire
Main Ingredient: 1,3-pentadiene (>95%)
Other Components: may include minor hydrocarbon impurities if byproduct-derived
Inhalation: move to fresh air, breathe deeply, seek medical attention if symptoms persist
Skin Contact: remove contaminated clothing, rinse skin with water and mild soap, get medical help if irritation continues
Eye Contact: flush eyes with water for several minutes, remove contact lenses if present, obtain medical advice if irritation remains
Ingestion: do not induce vomiting, rinse mouth, seek emergency medical help
Suitable Extinguishing Media: dry chemical powder, carbon dioxide, alcohol-resistant foam
Unsuitable Media: direct water jets can spread the fire
Special Hazards: emits flammable vapors heavier than air, may decompose under heat into toxic gases like carbon monoxide
Firefighting Advice: wear self-contained breathing apparatus, keep containers cool with water spray, avoid inhaling fumes
Spill Control: eliminate all ignition sources, ventilate area, contain spill with non-combustible absorbent
Personal Precautions: wear gloves, goggles, and respirator if inside or if large quantity
Clean-up: absorb with inert material, shovel into container for disposal, ventilate area well afterward, use spark-proof tools
Environmental Protection: prevent entry into drains, sewers, or waterways; report large releases to authorities
Handling: ground containers to prevent static, keep away from hot surfaces or flames, use in ventilated area
Storage Conditions: store in tightly closed, labeled container in a cool, well-ventilated space away from oxidizers or acids
Storage Recommendations: segregate from food, keep out of sunlight and incompatible materials, ensure secondary containment for large volumes
Engineering Controls: use fume hoods, explosion-proof exhaust fans
Exposure Limits: some countries set workplace limits for hydrocarbons; monitoring exposure ensures safer air quality at work
Personal Protection: chemical-resistant gloves, safety glasses, flame-retardant clothing, respiratory protection in confined areas
Hygiene Measures: wash hands after use, remove contaminated clothing promptly
Physical State: liquid
Color: colorless or light yellow
Odor: gasoline or petroleum-like
Boiling Point: between 42°C to 44°C
Melting Point: approximately -138°C
Flash Point: below -18°C
Density: roughly 0.68 g/cm³
Vapor Pressure: high at room temperature, allowing rapid evaporation
Solubility: insoluble in water, miscible with many organic solvents
Chemical Stability: remains stable under recommended storage; heat, light, peroxides can trigger polymerization or decomposition
Reactivity: reacts strongly with oxidizing agents and acids, may form peroxides on standing with oxygen
Hazardous Decomposition: burning releases carbon monoxide and carbon dioxide, with risk of other toxic compounds
Routes of Exposure: inhalation (main risk), skin contact, accidental eye contact, ingestion in rare cases
Health Effects: short-term exposure leads to dizziness, nausea, eye and skin irritation; long-term or repeated exposure may affect nervous system and lungs
Cancer Risk: no firm classification as a carcinogen, but hydrocarbons as a group require caution
Other Effects: exposure above recommended limits has connected to headaches, fatigue, and shortness of breath
Aquatic Toxicity: can be toxic to aquatic life, persistence in water leads to bioaccumulation in organisms
Environmental Fate: volatile, rapidly evaporates from surfaces, but spills still pose hazard for surface water and air
Biodegradability: breaks down in air and soil over several days, though not instantly removed
Waste Handling: collect liquid and absorbent material in proper, clearly marked hazardous waste container
Disposal Methods: send to licensed chemical disposal facility, follow regional and national waste rules
Precautions: avoid dumping in drains, land, or natural water bodies
UN Number: assigned for flammable liquids containing 1,3-pentadiene
Hazard Class: flammable liquid
Packing Group: based on flash point and boiling range, typically II or III for pentadienes
Transport Notes: label as flammable, keep away from heat and sparks, secure caps tightly, check transport vehicle compliance
Workplace Safety: most regulatory agencies rank 1,3-pentadiene as a hazardous substance due to fire, exposure, and spill risks
Labeling Requirements: flammable symbol, hazard phrases, keep away from children, personal safety guidance
Additional Restrictions: restrictions vary by nation on emissions, discharge, and workplace handling, sometimes requiring permits for high volumes
