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Chemical Name: 1-Hexyl-3-Methylimidazolium Hexafluorophosphate
Chemical Family: Ionic Liquid
Other Names: [Hmim][PF6], HMIHFP
Appearance: Colorless to pale yellow liquid
Odor: Slight, not especially noticeable
Synonyms: Hexylmethylimidazolium hexafluorophosphate
Hazard Class: Causes serious eye irritation, skin irritation, possible respiratory tract irritation
Pictograms: Exclamation mark commonly used for these hazards
Main Risks: Prolonged or repeated contact may cause dermatitis; Inhalation of vapors or aerosol causes nose and throat discomfort
Environmental Concern: Avoid release to aquatic systems; ionic liquids can be persistent
Main Component: 1-Hexyl-3-Methylimidazolium Hexafluorophosphate (HMIM PF6)
Chemical Formula: C10H19N2PF6
CAS Number: 155371-19-0
Percentage: Typically listed at or near 100% as pure material
Inhalation: Move outside for fresh air immediately, provide oxygen if breathing is labored, call for medical help if symptoms continue
Skin Contact: Wash with soap and water for at least 15 minutes, remove contaminated clothing and wash before reuse
Eye Contact: Rinse gently with water for at least 15 minutes, keep eyelids apart, and seek medical attention
Ingestion: Do not induce vomiting, rinse mouth with water, get medical help if any discomfort or symptoms develop
Flammability: Most ionic liquids show low volatility and limited flammability but thermal decomposition can release toxic vapors
Extinguishing Media: Use dry chemical, CO2, water fog, or foam
Hazardous Byproducts: May produce hydrogen fluoride, phosphorus oxides, imidazole vapors under combustion
Protective Equipment: Firefighters need self-contained breathing apparatus and full protective gear due to toxic decomposition products
Personal Precautions: Wear chemical-resistant gloves, goggles, and lab coat; prevent skin or eye contact
Environmental Precautions: Avoid release near surface water, storm drains, or soil
Cleanup Methods: Absorb spillage with inert material like vermiculite or sand, collect in tightly closed containers for disposal; ventilate the area
Handling Advice: Only use in well-ventilated settings, avoid contact with skin, eyes, and clothing; practice good industrial hygiene
Storage Conditions: Keep in a tightly closed container, store in cool, dry, well-ventilated space, protect from moisture and strong acids or bases
Incompatibles: Avoid storing near strong oxidizers or acids, as ionic liquids can decompose and generate hazardous gases
Recommended PPE: Laboratory gloves made of nitrile or natural rubber, safety goggles, lab coat
Engineering Controls: Work under local exhaust ventilation or in a chemical fume hood to keep airborne levels low
Hygiene: Wash hands thoroughly after handling, never eat or drink nearby, launder contaminated clothing before reuse
Appearance: Clear, slightly viscous liquid
Melting Point: Roughly -69 °C
Boiling Point: Decomposes before boiling
Solubility: Negligible in water, miscible with many organic solvents
Density: About 1.2 g/cm³ (can vary with purity and temperature)
Vapor Pressure: Very low
Odor Threshold: Not strongly odorous
Stability: Stable under standard laboratory conditions
Decomposition: Releases toxic fumes of HF and PF6 decomposition products if heated strongly or exposed to acids
Reactivity: May slowly decompose in presence of moisture or strong alkalis; avoid using with powerful oxidizers
Routes of Exposure: Mainly skin and eye contact, inhalation of dust or mist
Symptoms: Skin redness or irritation, eye burns or irritation, cough or sore throat on inhalation
Sensitization: Rare, but people with sensitive skin may react more strongly
Chronic Effects: Long-term toxicity data limited; ionic liquids require caution as newer chemicals
Studies: Published rodent studies show low acute toxicity, but caution needed for long-term exposure
Aquatic Toxicity: Ionic liquids can show toxicity toward algae and aquatic life at relatively low concentrations
Biodegradability: Generally persistent, not rapidly biodegradable
Bioaccumulation: Tends to have low bioaccumulation, but limited ecosystem data
Mobility: Low water solubility decreases risk of groundwater contamination, but persistence in soil and sediments poses concern
Recommended Disposal: Treat as hazardous laboratory chemical waste
Methods: Store waste in compatible, labeled containers; dispose via licensed chemical disposal contractor
Do Not: Pour down drain or dispose in municipal trash as ionic liquids may harm water treatment plants and aquatic systems
Transport Classification: Not universally regulated as dangerous, but local guidelines may vary
Packaging: Use tight, leak-proof containers; secondary containment when shipping
Precautions in Transit: Protect from strong sunlight, moisture, heat; avoid breaches that release liquid or vapor
Regulatory Status: Depends on country; considered "new chemical" under many national programs
Worker Protection: Subject to workplace safety regulations that require provision of PPE, access to safety data
Environmental Laws: Disposal and releases subject to environmental protection rules; some jurisdictions require reporting discharges for new chemicals
