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Name: Octafluoro-2-butene
Formula: C4F8
Synonyms: Perfluoro-2-butene
State: Colorless gas at room temperature
Odor: Faint, slightly sweet odor
Common Use: Found in specialty chemical manufacturing, sometimes introduced in refrigeration systems and certain plasma etching applications
Acute Risks: Simple asphyxiant from oxygen displacement, especially in enclosed spaces
Chronic Risks: Lack of thorough long-term studies, but many perfluorinated compounds show bioaccumulation; risk cannot be ignored
Physical Effects: Nonflammable, but decomposes to toxic gases at high temperatures
Health Effects: Inhalation may lead to dizziness or drowsiness, discomfort, or—at higher levels—respiratory distress due to reduced oxygen
Environmental Warnings: Highly persistent in atmosphere due to strong carbon-fluorine bonds; can contribute to global warming owing to stable, long-lived molecules
Single substance: Octafluoro-2-butene, present at high purity in industrially-prepared materials
Contaminants: Small amounts of other perfluorinated byproducts may be present depending on manufacturing controls
Inhalation: Move to fresh air, ensure breathing is easy; oxygen support if severe exposure occurs
Skin Contact: Wash the affected area with plenty of water; no notable corrosivity but flush out liquefied gas for frostbite risk
Eye Contact: Rinse immediately with plenty of water, seek medical advice if irritation persists
Ingestion: Highly unlikely due to gaseous state; basic medical supervision is enough if symptoms develop after accidental swallowing
Suitability: Not itself flammable, but fire may break out from surroundings; dry chemical, carbon dioxide, or water fog are deemed suitable for adjacent fires
Special Hazards: Decomposition yields hydrogen fluoride and other toxic fluorine gases under intense heat
Protective Equipment: Self-contained breathing apparatus and full protective suit stand necessary for any responders near fire
Evacuation: Move unaffected personnel away from the affected area to reduce risk of exposure to decomposition gases
Personal Protection: Ventilate area thoroughly, wear protective gloves and goggles, and avoid breathing vapor
Small Spills: Use forced-air ventilation; if possible, capture with engineering controls or safe exhaust systems
Large Releases: Evacuate area, contact emergency responders trained for gas containment, employ leak detectors if available
Environmental Protection: Prevent release to soil, watercourses, and drains to avoid uncontrolled atmospheric accumulation
Handling: Keep containers tightly closed and use only in well-ventilated spaces to avoid accidental buildup
Storage: Store in cool, dry, and stable environments, with adequate measures to prevent high-temperature exposure
Segregation: Separate from incompatible chemicals, such as strong alkalis and oxidizers
Engineering Controls: Employ forced ventilation or local exhaust systems in spaces where concentration can rise
Respiratory Protection: For high concentrations, use approved respirators or supplied air systems
Hand Protection: Chemical-resistant gloves
Eye and Face Protection: Safety goggles or face shields
Other: Wear antistatic clothing and avoid direct contact with liquefied gas due to frostbite hazard
Appearance: Colorless gas
Boiling Point: Close to atmospheric ambient temperature
Vapor Pressure: High at standard conditions, underlines rapid dispersal
Solubility: Low in water, mostly nonpolar solvent affinity
Density: Greater than air; tends to collect in low-lying areas
Odor: Mildly sweet
Chemical Stability: Stable under ordinary conditions, non-reactive with common container materials
Thermal Decomposition: Generates toxic fluorinated gases and hydrogen fluoride above roughly 200°C
Incompatible Materials: Strong bases, reactive metals, strong oxidizers
Hazardous Reactions: No explosive reactivity under normal use, though subjected to electrical discharge or heating can cause dangerous breakdown products
Acute Effects: Exposure to high concentrations causes asphyxiation due to displacement of oxygen
Chronic Effects: Insufficient data for long-term toxicity in humans; animal studies on related compounds suggest potential for bioaccumulation
Sensitization: No reported cases of skin or respiratory sensitization
Target Organs: Central nervous system symptoms following overexposure
Mutagenicity/Carcinogenicity: Not classified, but long carbon-fluorine chains demand caution due to persistence
Persistence: Strong fluorinated structure makes rapid environmental degradation unlikely, ensures accumulation in the atmosphere
Bioaccumulation: Related perfluorinated compounds have shown buildup in animals, risk of biomagnification in ecological systems
Mobility: Can travel long distances atmospherically before settling
Toxicity: Direct aquatic toxicity remains unquantified, but indirect risks from persistence and accumulation deserve strong consideration
Best Practices: Incinerate with adequate scrubbers for hydrogen fluoride capture; landfill only as a last resort with proper containment
Recycling: Industrial reclamation of unused product can reduce waste
Regulatory Requirements: Adhere to hazardous waste controls designed for perfluorinated chemicals
Transport Classification: Compressed gas under pressure; risk from rupture, rapid escape of gas
Packaging: Must be tightly sealed, transported in suitable high-pressure cylinders with clear hazard labeling
Restrictions: National and international rules exist for handling, placarding, and emergency response drills during transport
Incompatibles: Keep separate from food, animal feed, and common oxidizers
Legislation: Subject to chemical registration requirements and reporting under environmental protection laws targeting fluorinated gases
Labeling: Required hazard symbols for asphyxiant gas and environmental risk
Restrictions: Likely to come under tighter controls as agencies react to environmental persistence and global warming potential; ongoing research into fluorinated compound regulation means new rules could take shape
Worker Safety: Needs strict enforcement of workplace exposure monitoring through air testing and health reporting for those regularly exposed
