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Product Name: 2-Ethyl-1-Butene
Chemical Formula: C6H12
CAS Number: 563-79-1
Synonyms: 2-Ethylbut-1-ene, Ethylbutylene
Recommended Use: Organic synthesis, chemical manufacturing
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Classification: Flammable liquid (Category 2), Acute toxicity – inhalation (Category 4), Skin and eye irritant (Category 2)
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor. May cause respiratory irritation. May cause skin and eye irritation. Harmful if inhaled.
Pictograms: Flame, Exclamation Mark
Precautionary Statements: Keep away from heat, sparks, open flames, and hot surfaces. Use explosion-proof equipment. Use only outdoors or in a well-ventilated area. Wear protective gloves, clothing, and eye/face protection. Avoid breathing vapor or mist.
Label Elements: Retain all hazard and precautionary language on containers.
Chemical: 2-Ethyl-1-Butene
CAS Number: 563-79-1
Percent: >98% pure
Impurities: Trace amounts of other butenes or isomers, typically less than 2%
Inhalation: Move person to fresh air immediately. Keep at rest in a position comfortable for breathing. Seek medical attention if symptoms persist. Provide oxygen or artificial respiration if needed.
Skin Contact: Remove contaminated clothing. Wash skin immediately with mild soap and plenty of water for at least 15 minutes. If irritation continues, get medical attention.
Eye Contact: Rinse cautiously with water for several minutes, lifting upper and lower eyelids occasionally. Remove contact lenses if present and easy to do. Get medical help immediately if symptoms persist.
Ingestion: Do not induce vomiting. Rinse mouth. Seek medical attention without delay. If person is unconscious, do not give anything by mouth.
Most important symptoms and effects: Dizziness, headache, drowsiness, skin or eye irritation, coughing or respiratory difficulty.
Indication of immediate attention needed: Respiratory distress or persistent irritation require rapid medical evaluation.
Advice for physicians: Treat symptomatically, monitor for respiratory and central nervous system effects.
Suitable Extinguishing Media: Dry chemical, foam, carbon dioxide. Use water spray only to cool containers.
Unsuitable Media: Do not use water jets directly on fire.
Specific Hazards: Vapors may form explosive mixtures with air. Containers exposed to fire may rupture violently. Thermal decomposition produces irritating and toxic fumes.
Protective Equipment and Precautions: Firefighters must wear self-contained breathing apparatus and full protective gear.
Special Instructions: Move containers from fire area if it can be done safely. Cool containers with water mist. Prevent runoff from entering sewers or waterways.
Personal Precautions: Evacuate personnel to safe areas. Remove all sources of ignition. Ensure adequate ventilation. Avoid breathing vapors or contact with skin and eyes.
Environmental Precautions: Prevent further leakage or spillage if safe. Stop release to drains, soil, surface water, or groundwater.
Methods for Cleanup: Absorb spill with non-combustible absorbent (e.g., sand, earth, or vermiculite). Use spark-proof tools and equipment. Collect in tightly sealed, labeled containers for disposal. Clean area thoroughly after material pickup.
Notification: Report large spills to local, regional, and national authorities as required.
Safe Handling: Handle only in well-ventilated locations away from heat, sparks, static electricity, or open flames. Avoid inhaling vapors or allowing material to contact skin and eyes. Use proper grounding and bonding when transferring this liquid.
Hygiene Measures: Do not eat, drink, or smoke while using this product. Wash hands thoroughly after handling.
Safe Storage: Store in tightly closed, clearly labeled containers. Keep away from oxidizers, acids, and direct sunlight. Use flammable liquid-approved storage. Store at recommended temperatures below 30°C, in dry, well-ventilated facilities.
Incompatible Materials: Strong oxidizing agents, acids, halogens.
Occupational Exposure Limits: None established specifically for 2-Ethyl-1-Butene, but handle as a volatile hydrocarbon (consult local regulations and general hydrocarbon limits).
Engineering Controls: Work in properly functioning fume hoods or with local exhaust ventilation. Install flame-proof electrical systems in areas with risk of vapor release.
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene), tight-fitting chemical safety goggles, long-sleeved clothing or lab coats, and flame-resistant overalls.
Respiratory Protection: In poorly ventilated spaces or if vapor levels may exceed safe limits, use approved air-purifying respirators with organic vapor cartridges.
Environmental Controls: Collect and manage all waste streams containing this chemical as hazardous waste.
Appearance: Colorless liquid
Odor: Mild hydrocarbon
Odor Threshold: Not determined
pH: Not applicable (non-aqueous hydrocarbon)
Melting Point / Freezing Point: -135°C
Boiling Point: 63-66°C
Flash Point: -20°C (closed cup)
Evaporation Rate: Rapid
Flammability: Highly flammable
Upper/Lower Flammability or Explosive Limits: 1.1% (LEL), 7.5% (UEL)
Vapor Pressure: ~185 mmHg at 20°C
Vapor Density: 2.5 (air=1)
Relative Density: 0.68 (water=1)
Solubility: Insoluble in water
Partition Coefficient (n-octanol/water): 3.3
Auto-ignition Temperature: 230°C
Decomposition Temperature: Not determined
Viscosity: Low, typical of hydrocarbons in this category
Chemical Stability: Stable under typical temperatures and pressures, if kept away from ignition sources.
Reactivity: Readily reacts with strong oxidants. Can polymerize under certain conditions in the presence of acids.
Possibility of Hazardous Reactions: May react violently with oxidizers; may form peroxides. Polymerization possible at elevated temperature or with strong acids.
Conditions to Avoid: Heat, open flames, sparks, static discharge, incompatible materials.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, possible aldehydes and ketones under incomplete combustion.
Likely Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Effects: Breathing vapor may cause dizziness, headache, nausea, respiratory irritation. Liquid can cause skin or eye redness and irritation.
Chronic Effects: Prolonged or repeated exposure may dry skin or cause dermatitis. No evidence of carcinogenicity or reproductive hazard found in available literature, but detailed long-term data are limited.
Toxicity Data: Not extensively studied; similar alpha-olefins (C6) show low acute toxicity (oral LD50 in rats >2000 mg/kg). Inhalation LC50 (rat, 4h) estimated >10,000 ppm.
Symptoms: Central nervous system effects at high vapor concentrations, skin or eye irritation.
Medical Conditions Aggravated by Exposure: Pre-existing respiratory, skin, or eye disorders.
Ecotoxicity: Harmful to aquatic organisms. May cause long-term adverse effects in the aquatic environment.
Persistence and Degradability: Expected to be readily biodegradable in the environment, but volatility leads to rapid loss to the atmosphere.
Bioaccumulative Potential: Moderate, log Kow of 3.3 suggests some potential for bioaccumulation, but rapid biodegradation and evaporation mitigate environmental persistence.
Mobility in Soil: Low water solubility limits movement through soil. Most material vaporizes quickly if released.
Other Adverse Effects: Air emissions contribute slightly to ground level ozone formation.
Waste Disposal Methods: Collect and incinerate in approved chemical incinerators with afterburner and scrubber. Dispose of all waste according to federal, state, and local regulations. Do not dispose in drains, natural waterways, or open land.
Container Disposal: Empty containers may contain residue or vapors. Do not reuse. Dispose as hazardous waste.
Precautions for Disposal: Consult with licensed hazardous waste disposal companies for best practice and regulatory compliance.
UN Number: UN2457
Proper Shipping Name: 2-Ethyl-1-Butene
Transport Hazard Class: 3 (Flammable Liquids)
Packing Group: II
Environmental Hazards: Marine pollutant in bulk quantities
Special Precautions: Keep containers upright and secure. Use proper labeling and documentation. Avoid transport with incompatible substances.
Regulatory Transportation Details: Refer to ADR, DOT, IATA, IMDG rules for flammable liquids for further information.
OSHA: Classified as hazardous. Covered under Hazard Communication Standard.
TSCA: Registered for commercial use in the United States.
SARA 302/304: Not listed as extremely hazardous for accidental release.
SARA 311/312: Categorized for fire hazard and acute health hazard.
SARA 313: Not subject to toxic chemical release reporting.
WHMIS Classification (Canada): B2 (Flammable liquid); D2B (Toxic by skin/eye contact)
EU (REACH): Registration required as a phase-in substance.
Other Regulations: Check with local, state, and international regulations for additional controls or restrictions.
