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Chemical Name: 2,3-Dimethyl-2-butene
Synonyms: Tetramethylethylene
CAS Number: 563-79-1
Appearance: Colorless liquid, slight petroleum-like odor
Molecular Formula: C6H12
Physical Hazards: Highly flammable liquid and vapor; catches fire easily from open flame, sparks, static discharge, or even strong heat
Health Hazards: Inhalation brings on dizziness, headaches, and irritation to respiratory tract. Skin contact can trigger dryness and irritation, especially if exposure goes on long enough. Eyes sting and water up quickly after a splash. Swallowing brings on stomach discomfort and, for vapor-heavy environments, risk of lung injury
Environmental Hazard: Liquid run-off seeps into soil and water, carrying risks for aquatic life in nearby bodies. Not as widely known as household chemicals, but still does a number on water-loving species
Main Ingredient: 2,3-Dimethyl-2-butene, usually makes up the entire volume, with impurities rarely listed or significant. For a lot of folks studying chemicals, pure samples matter, and this one shows up pretty direct and uncut on most MSDS reports. This clarity makes the risks easier to identify, but that pure nature also means undiluted hazards
Inhalation: Carry person into fresh air and loosen tight clothing. If breathing falls off, encourage slow, deep breaths or use oxygen when available in a lab. Dizziness and drowsiness often clear up out in open air, but fainting or long-lasting headaches call for medical help
Skin Contact: Wash thoroughly with soap and water right away. Remove contaminated clothing and shoes; launder before reuse, because residue sticks around. Any rash or irritation that lasts should prompt a trip to a doctor
Eye Contact: Flush with plenty of water for at least fifteen minutes. Do not rub, and keep eyelids apart for full washout. Blurred vision, stinging, or redness longer than a few minutes isn’t something to brush off—see an eye doctor
Ingestion: Rinse mouth; don’t force vomiting unless told by medical staff. Seek medical attention for ongoing pain, drowsiness, or confusion
Suitable Extinguishing Media: Dry chemical, foam, or carbon dioxide put out most small fires. Never use water in a big stream on the liquid itself; goes right over the top and spreads flames. Spray water onto containers nearby only to cool them
Fire Hazards: Vapors form explosive mixtures with air and travel long distances to ignition sources. Closed containers can burst in heat. Burning brings off thick, irritating smoke, possibly sending out carbon monoxide or other gases
Protective Equipment for Firefighters: Firefighters must wear self-contained breathing apparatus and full protective gear to block vapor exposure. Keep upwind to avoid inhalation of fumes
Personal Precautions: Shut off ignition sources. Ventilate area to promote fresh airflow. Don’t breathe fumes; keep out anyone without gloves, goggles, or a respirator
Environmental Precautions: Prevent entry into drains and watercourses. Dike the spill area with earth or absorbent pads to catch leaks
Cleanup Methods: Absorb spill with inert material like sand or vermiculite, not sawdust. Collect residues in a steel drum sealed tight for disposal. Scrub surfaces with water and detergent, aiming to wash away all traces for safety
Handling: Use spark-proof tools, ground all equipment. Work in areas with solid ventilation or fume hoods. Wearing gloves, splash goggles, and flame-resistant lab coats isn’t just cautious—it’s the difference between routine work and quick disaster
Storage: Store in cool, dry, well-ventilated spaces away from sun, heat, and any ignition sources. Keep containers tightly closed, labeled clearly. Don’t stack flammable liquids too high, or leave them near exits or emergency paths
Engineering Controls: Fume hoods or local exhaust fans cut down risk of inhaling harmful levels, especially during transfer or open work
Personal Protective Equipment: Nitrile or butyl rubber gloves keep the stuff off the skin. Safety goggles guard the eyes against splashes. Lab coats or aprons block drips and spills. For work in tight, vapor-heavy spots, a proper respirator picks up the slack for the lungs
Occupational Exposure Limits: No well-documented government exposure limits widely set for this compound, yet common sense and standard flammables protocol keep workers from breathing much of it
Physical State: Liquid
Color: Clear, colorless
Odor: Mild, petroleum-like
Boiling Point: Roughly 79–80°C
Melting Point: Falls below room temperature, so usually stays liquid
Flash Point: Reports vary, but typically below 0°C—very flammable territory
Density: About 0.68 g/cm³
Solubility: Does not mix with water; dissolves in organic solvents
Vapor Pressure: High enough to make fume build-up a worry in closed spaces
Chemical Stability: Stays stable in closed containers kept away from extremes of heat or direct sunlight. Extended warmth or contact with air brings on slow breakdown and evaporation
Conditions to Avoid: Avoid flames, sparks, or static electricity nearby. Mixing with strong oxidizers or acids sets off dangerous reactions
Hazardous Reactions: Forms peroxides over time if left exposed to air
Decomposition Products: Burning or overheating ships out carbon monoxide, carbon dioxide, and possibly toxic smoke
Inhalation: High concentrations turn up headaches, drowsiness, irritation of nose and throat. Chronic exposure ramps up risk of organ or nervous system effects, although most folks who handle the solvent in labs try to limit contact significantly
Skin Contact: Repeated exposure leaves skin cracked, dry, and chapped
Eye Contact: Stings, blurs vision, reddens the whites
Ingestion: Stomach pain, nausea, possible drowsiness or confusion. Enough exposure lands a person in the hospital
Long-Term Effects: Data from long-term studies stays thin, but similar hydrocarbons raise alarm for chronic nervous system effects if used daily without care.
Environmental Impact: Spilled liquid runs along concrete, drains down into stormwater and hits rivers and streams. Wildlife in and around these waterways face tough odds; aquatic species especially feel the stress from lack of oxygen and chemical buildup
Biodegradability: Breaks down over time in the environment, but not fast enough to rule out buildup. Cleanup teams need to move fast; left untouched, it lingers
Persistence and Bioaccumulation: Not known to build up in fish or food chains, but water contamination is still a serious concern
Waste Treatment: Never dump leftovers in the sink or regular trash. Most labs turn their hazardous waste over to licensed handlers who burn, treat, or bury it far away from homes and schools
Container Disposal: Improperly cleaned drums keep vaporizing long after the liquid seems gone. Rinsed, drained, and held for professional removal always beats backyard methods
UN Number: 1159
Proper Shipping Name: 2,3-Dimethyl-2-butene
Hazard Class: Flammable Liquid
Packing Group: II or III depending on volume and method of containment
Transport Guidance: Trained staff use steel drums, fully closed, clearly labeled, and keep logs for every batch. Transportation crews avoid smoking, sparks, and carry fire extinguishers on board. On highways or in cargo planes, placement stays away from strong oxidizers or acids.
Classified: As a flammable liquid under established chemical hazard laws. Reportable quantities and workplace guidelines often trace back to OSHA and EPA standards for flammable organic solvents
Worker Safety: Supervisors train new hires on risks and responses before opening the first bottle. Some regions set exposure levels under flammable substances, and each workplace shows how to report accidents and access emergency equipment
Labeling Requirements: Labels include chemical name, flammability icon, and risk statements about inhalation, ignition, and medical response planning. Consumer products rarely carry this compound, but in labs, the bright warning labels show just how crucial respect for proper handling can be
