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Chemical Name: 1-Butyl-3-methylimidazolium chloride
Chemical Family: Ionic liquid
Molecular Formula: C8H15ClN2
Common Use: Seen in labs for solvent extractions, electrochemistry, cellulose processing; valued for low volatility, high thermal stability, and ability to dissolve polymers
Potential Hazards: Eye and skin irritation, respiratory tract irritation possible with dust, unknown long-term health effects
Major Concerns: Noted in literature for low vapor pressure, so inhalation risk stays lower but not absent in powder or fine mist situations; acute toxicity considered low, though chronic effects are not well documented
Relevant Classifications: Not listed as a carcinogen, mutagen, or reproductive toxin by major agencies, but comprehensive toxicological data is limited
Main Exposure Routes: Skin contact, ingestion, inhalation of particles
Active Ingredient: 1-Butyl-3-methylimidazolium chloride (CAS Number: 79917-90-1)
Purity: Laboratory and industrial samples usually above 95%
Skin Contact: Rinse off with plenty of water and mild soap, remove contaminated clothing
Eye Contact: Flush eyes cautiously with water for several minutes, lift eyelids to remove any residue
Inhalation: Move to fresh air quickly, monitor for cough or irritation, seek medical advice if discomfort persists
Ingestion: Rinse mouth, don’t induce vomiting unless directed by medical professionals
Suitable Extinguishing Media: Water spray, foam, dry chemical, CO2 all prove useful against burning packaging or surrounding materials
Key Fire Hazards: Product doesn’t ignite easily by itself, but heating can cause decomposition and release of potentially irritating gases like hydrogen chloride
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective gear
Personal Precautions: Use chemical-resistant gloves and safety goggles to avoid direct contact
Spill Response: Contain and absorb spills with inert material such as sand or vermiculite; avoid creating dust; ventilate area
Cleanup: Collect for proper disposal, wash affected surface thoroughly with water and detergent
Handling Tips: Avoid unnecessary dust generation, ventilate workspaces, and keep direct contact to a minimum
Storage Advice: Keep container tightly closed in cool, dry location; avoid strong oxidizers and moisture, as the salt can be hygroscopic and clump or degrade; keep incompatible materials away
Ventilation: Ensure good local exhaust ventilation, especially during transfers or when powder is handled
Personal Protective Equipment: Use nitrile or neoprene gloves, splash goggles, and consider protective lab coats
Hygiene: Avoid eating, drinking, or smoking around material; always wash hands and face after handling
Respiratory Protection: Use dust mask or respirator if airborne material becomes significant; check local occupational exposure limits where available, though OELs are often not formally established for this compound
Appearance: Typically white to off-white crystalline solid
Odor: Odorless or slight odor
Solubility: Highly soluble in water and many polar solvents
Boiling Point: Decomposes before boiling
Melting Point: Reported near 70–80°C
Density: Approximately 1.1–1.2 g/cm³
Vapor Pressure: Negligible at room temperature
Other Notable Factors: Hygroscopic, tends to absorb moisture from air
Chemical Stability: Fairly stable at ambient temperature, best kept dry
Conditions to Avoid: Prolonged contact with moisture, strong oxidizers, high heat
Incompatibility: Strong acids, bases, oxidizers, materials that react with chlorides
Decomposition Products: Heating may yield hazardous products including hydrogen chloride and organic fragments
Acute Toxicity: Data remains sparse; animal studies suggest low acute toxicity by ingestion, limited skin penetration
Chronic Exposure: Unknown—a reason for minimizing unnecessary exposure and reinforcing laboratory safety
Irritation Potential: May cause skin and eye irritation, respiratory tract discomfort with dust exposure
Carcinogenicity / Mutagenicity: Unclassified due to insufficient studies
Professional Experiences: Working in chemical research, it’s common to treat unknowns with the protections reserved for more hazardous salts; this salt’s low volatility does not erase the risk from dust or solution splashes
Environmental Fate: Limited published studies, but ionic liquids often show moderate to high aquatic toxicity compared to traditional organics; persistent in water due to high solubility
Aquatic Toxicity: Research signals risk to aquatic organisms—experiments show adverse effects at relatively low concentrations, which underscores importance of preventing release to sewers or waterways
Bioaccumulation: Data generally indicates low tendency to bioaccumulate, though breakdown pathways and products receive far less study
Disposal Methods: Keep separate from regular waste streams, follow hazardous waste protocols as advised for laboratory chemicals
Waste Minimization: Reduce waste by careful scaling of experiments and reuse when possible
Local Compliance: Coordinate with certified electronics or chemical disposal vendors; don’t pour into drains or mix with incompatible substances
Classification: Not regulated as a dangerous good under most common transportation listings
Packaging: Use well-sealed packaging, protect from moisture, and label clearly; ship in compliance with institutional and carrier guidelines for chemicals
Relevant Laws: Few countries have specific rules for ionic liquids like 1-butyl-3-methylimidazolium chloride; rely on general chemical safety and hazardous substance regulations
Worker Safety: Employers and academic supervisors should set protocols covering personal protective equipment and exposure monitoring, even in the absence of targeted national rules
Community Right-to-Know: It helps to consult environmental and workplace hazard lists because regulatory status may evolve with further research; open communication between handling staff and safety officers matters most to ensure everyone stays safe
