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Chemical Name: 3-Methyl-1-Butene
Synonyms: Isoamylene, 1-Butene, 3-methyl-
Chemical Formula: C5H10
Molecular Weight: 70.13 g/mol
Physical Form: Colorless liquid or gas, depending on temperature and pressure
Odor: Mild hydrocarbons, often a faint gasoline-like smell
Uses: Intermediate in making antioxidants, synthetic rubber, flavors, and fragrances; also important in many lab and chemical settings
Main Hazards: Highly flammable, forms explosive mixtures with air, causes respiratory irritation, may lead to drowsiness or dizziness if inhaled in high amounts
Health Effects: Inhalation leads to headaches, dizziness, or even loss of coordination; can irritate skin and eyes; central nervous system can be affected in cases of overexposure
Environmental Effects: Volatile organic compound, contributes to ground-level ozone formation; vapor heavier than air, collects at low points
Primary Ingredient: 3-Methyl-1-Butene (C5H10), typically present at 98% or higher
Impurities: Other butenes or pentenes, usually trace levels, vary by production method
Inhalation: Move to fresh air quickly, keep affected person warm and at rest, get medical attention if symptoms linger
Skin Contact: Wash exposed area with plenty of water and mild soap, remove contaminated clothing, seek medical advice for irritation
Eye Contact: Rinse with gentle water stream for several minutes, lift eyelids for full coverage, consult a doctor if redness persists
Ingestion: Unlikely under normal use, rinse mouth, seek immediate medical help, avoid inducing vomiting if material is swallowed
Extinguishing Media: Use foam, dry chemical, or carbon dioxide; water spray helps cool nearby surfaces
Special Hazards: Vapor forms explosive mixtures with air, risk of flashback along vapor trail, burns with a luminous flame
Protective Equipment: Full protective gear and self-contained breathing apparatus needed in significant fire situations
Advice for Firefighters: Stay upwind to avoid vapors; use water to cool containers but avoid direct jet on burning liquid; evacuate area if large fire threatens
Personal Precautions: Remove all ignition sources, evacuate non-essential personnel, ventilate area thoroughly
Protective Equipment: Respiratory protection recommended for large spills; gloves and eye protection reduce risk of contact
Cleanup Methods: Absorb with non-combustible materials like sand or earth, transfer to a suitable container for disposal, wash area with water afterward to evaporate residues
Environmental Precautions: Stop leaks if safe, prevent further spillage into drains or soil, notify authorities in case of widespread contamination
Handling: Work in a well-ventilated area, avoid ignition sources or static discharge, ground and bond containers when transferring material, use explosion-proof equipment for pumps and ventilation
Storage: Keep containers tightly closed in a cool, dry, and well-ventilated space, separate from incompatible chemicals (like strong oxidizers), store away from direct sun or heat, ensure good labeling and access for inspection
Occupational Exposure Limits: Some regulatory bodies recommend restricting workplace air levels, often referencing total hydrocarbons or similar alkenes
Engineering Controls: General and local exhaust ventilation keep vapors below exposure limits, fume hoods in labs
Personal Protective Equipment: Nitrile or other chemical-resistant gloves, splash-resistant safety goggles, flame-retardant lab coats, respiratory protection if airborne concentrations exceed recommended levels, eyewash stations and safety showers should be kept nearby
Appearance: Colorless liquid at ambient conditions, volatile
Odor: Faint gasoline or hydrocarbon-like
Boiling Point: Around 63°C (145°F)
Melting Point: Below -120°C (-184°F)
Vapor Pressure: High at room temperature
Density: Less than water, floats on water surfaces
Solubility: Insoluble in water, mixes with most organic solvents
Flash Point: Below 0°C (less than 32°F)
Autoignition Temperature: May ignite at temperatures above 230°C (446°F)
Chemical Stability: Stable at standard temperatures and pressures under normal storage and handling
Incompatible Substances: Strong oxidizers, acids, halogens, can cause hazardous reactions, possible violent polymerization if catalysts present
Hazardous Decomposition: Burning produces carbon monoxide, carbon dioxide, possible traces of unburned hydrocarbons
Conditions to Avoid: Heat, flames, sparks, static electricity, strong sources of UV radiation, and mixing with incompatible substances
Acute Effects: High concentrations cause short-term health problems like headaches, dizziness, or nausea; risk rises in enclosed spaces
Chronic Effects: No clear evidence of long-term health damage with routine handling, but persistent exposure to hydrocarbon vapors has raised concerns over time in occupational studies
Carcinogenicity: Not classified as carcinogen by major agencies, but prudent workplace practice always treats hydrocarbon exposure with caution
Routes of Exposure: Primarily inhalation, less commonly skin or eye contact, nearly never by ingestion in controlled settings
Persistence: Breaks down fairly quickly in atmosphere due to reactivity, especially with ozone-forming reactions
Bioaccumulation: Unlikely, as it degrades and volatilizes rapidly
Aquatic Impact: Toxicity to aquatic life considered moderate, but main risk comes from oxygen depletion and contribution to smog if released in large spills
Soil Mobility: Moves easily through soils as a vapor, may not remain long in water or sediment
Waste Handling: Combust at an approved incineration facility, observe local and national hazardous waste codes, never dispose down the drain or regular landfill
Packaging: Decontaminate empty containers, puncture or crush before recycling or final disposal
Spill Wastes: Handle as hazardous waste, keep in sealed drums pending disposal, detailed labeling prevents accidents or confusion later in the process
Class: Flammable liquid or gas under transport regulations
Labeling: Requires flammable symbol and clear name
Precautions: Ensure upright secure containers, avoid stacking, separate from oxidizers, no smoking or open flames during loading/unloading
Bulk Shipments: Specialized tanks resist chemical attack; ventilation reduces vapor build-up
Documentation: Shippers need detailed descriptions for carrier safety and emergency responders
Registration: Regulated by various worker safety agencies as a hazardous material
Reportable Quantities: Exceeding set release thresholds often must be reported to environmental authorities
Labeling Harry: OSHA and similar agencies require hazardous communication on containers and Safety Data Sheets
Worker Protections: Personal protective gear, workplace exposure limits, and training rules strictly enforced in many regions
