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Chemical Name: 1-Chloro-2,2,2-Trifluoroethane
Common Names: HCFC-133a, R-133a
Chemical Formula: C2H2ClF3
CAS Number: 75-88-7
Classification: Compressed Liquefied Gas, Non-flammable Gas under normal atmospheric conditions
Health Risks: May cause drowsiness, dizziness, or narcotic effects if inhaled in large concentrations; skin contact with liquid may lead to frostbite due to rapid evaporation and cold temperature; high concentrations may displace oxygen in confined spaces
Environmental Impact: Contributes to greenhouse gas effect; has a moderate ozone depletion potential; impacts increase sharply with spills or leaks in closed facilities
Label Elements: Gas under pressure—precaution for handling containers and cylinders is vital; inhalation can depress the central nervous system; rapid skin contact can cause burns by freezing tissues instead of surface chemical irritation
Substance: 1-Chloro-2,2,2-Trifluoroethane
Purity: Often above 99% in technical grades; contaminants are rare but may include related halogenated hydrocarbons
Impurities: Trace acid or moisture contamination can change stability and might trigger unwanted decomposition
Inhalation: Move affected person to fresh air and provide support if breathing has stopped; exposure to elevated concentrations may cause rapid onset of confusion, headache, or loss of coordination
Skin Contact: Remove contaminated clothing, do not rub affected area, and rinse thoroughly with lukewarm water for at least fifteen minutes; avoid direct contact with liquid; serious frostbite may require medical attention
Eye Contact: Flush eyes with water for several minutes, holding eyelids apart; call a physician for assessment if irritation or burns occur
Ingestion: Not expected due to gaseous state at room temperature, though accidental contact with cryogenic liquid should follow procedures similar to frostbite; do not induce vomiting
Fire Hazards: Not easily combustible as a vapor; decomposition in high heat or flame can produce hazardous gases including hydrogen chloride and hydrogen fluoride, both highly toxic and corrosive
Suitable Extinguishing Media: Use dry chemical, carbon dioxide, or water spray for small fires; always target the fuel source, as the gas itself sustains little combustion risk
Special Firefighting Procedures: Wear full protective gear and self-contained breathing apparatus to avoid inhaling decomposition products; cylinders may rupture violently when exposed to fire
Explosion Risk: Pressure build-up in confined containers may cause rupture or explosion if directly heated; ensure rapid cooling with water streams from a safe distance
Spill or Leak Response: Evacuate area, ventilate well, and contain release with nonsparking tools; avoid direct contact with liquid coolant and steer clear of low-lying vapors which may displace oxygen in pits, tanks, or basements
Personal Precautions: Ensure use of protective clothing and gloves resistant to cold burns; rescue teams may require respiratory protection if concentrations rise above recommended exposure limits
Environmental Steps: Prevent releases into drains, sewers, and confined environments due to risks of atmospheric accumulation and soil or water contamination
Handling: Keep cylinders upright, secure from physical impact and heat sources; transfer with specialized, pressure-tested equipment due to risk of pressurized jetting
Storage: Store in cool, dry, well-ventilated places separated from incompatible chemicals; temperatures must remain under 52°C to prevent excess pressure buildup; keep away from reducing agents and alkali metals
Incompatibilities: Alkali metals, finely divided metals, and strong oxidizers can trigger dangerous reactions
Occupational Exposure Limit: No long-established global consensus, but typical recommendations often suggest keeping airborne concentrations below 1000 ppm for chronic exposure
Engineering Controls: Use of mechanical exhaust and general ventilation essential for processing or transferring this gas
Personal Protective Equipment: For personal safety, select gloves resistant to cryogenic burns, standard safety goggles or a full face shield for splash hazard, and chemical-resistant clothing when dealing with large volumes or leaks
Respiratory Protection: Employ self-contained breathing apparatus in low-oxygen spaces or during spill response; regular operations may not require respiratory protection if ventilation is sufficient
Appearance: Colorless, clear, non-flammable compressed gas or liquefied gas depending on storage
Odor: Faint, slightly sweet or ether-like
Boiling Point: About -26°C
Vapor Pressure: Approximately 4200 mmHg at room temperature
Solubility: Slightly soluble in water, much more so in organic solvents
Density: Nearly 1.35 g/cm³ as liquid at 25°C
Chemical Stability: Remains stable under most storage and handling conditions
Hazardous Polymerization: Does not polymerize
Decomposition Risk: High temperatures or open flames break down the gas into hydrogen fluoride and hydrogen chloride, both health hazards and corrosive in moist air
Reactivity: Contact with magnesium, potassium, sodium, or burning metals can set off violent reactions
Corrosiveness: Decomposition by metal surfaces or electric sparks results in highly corrosive halogen acids
Acute Effects: Dizziness, headaches, nausea, vomiting, and possible central nervous system depression after short-term high exposure; at levels above 10,000 ppm, loss of consciousness and cardiac irregularities noted in animal studies and industrial incidents
Chronic Exposure: No conclusive studies have linked low-level chronic exposure to lasting health detriment in humans, but long-term effects on liver or heart function seen in rodent models
Carcinogenicity: Not proven to cause cancer; agencies like IARC and NTP have not classified as human carcinogen
Mutagenicity and Reproductive Effects: Mutagenic potential appears low, but long-term reproductive impact remains under assessment
Aquatic and Terrestrial Toxicity: No acute toxicity to aquatic life at ordinary environmental concentrations, though breakdown products can acidify water or damage exposed vegetation
Persistence and Degradability: Stays persistent in the atmosphere; contributes to ozone depletion and global warming
Bioaccumulation: Does not bioaccumulate significantly in organisms, but stays in the environment for extended periods
Environmental Mobilization: Rapid vaporization leads most loss to air, not soil or water
Preferred Disposal Method: Reclaim for reuse or controlled incineration under strict conditions to limit formation of hazardous products
Waste Management: Leaks or leftover contents require specialized hazardous material handlers
Environmental Protection: Never dump or vent directly to the environment; professional facilities have processes to destroy or recycle halocarbons
UN Number: 1022 is widely used for pressurized cylinders
Transport Hazard Class: Class 2.2 (compressed, nonflammable gases)
Packaging Guidelines: Only transport in sealed, DOT-approved cylinders; protect from dropping, impact, or tampering; placard as hazardous compressed gas
Special Precautions: Emergency response guides suggest evacuation of spill areas, immediate reporting, and restriction of public access in the event of transportation incidents
International Restrictions: Monitoring of import, export, and use under international agreements tracking hydrochlorofluorocarbons due to ozone depletion
Workplace Use: Many regions have workplace exposure guidelines—OSHA, ACGIH, and similar agencies reference best practices for engineering controls, ventilation, and periodic monitoring to safeguard worker health
Environmental Regulation: Ongoing efforts to phase out or strictly control usage in developed economies, with periodic review of refrigerant alternatives supporting environmental progress
