Product Name: 1-Butyl-3-Methylimidazolium Hydrogen Sulfate
Chemical Formula: C8H16N2O4S
Chemical Family: Ionic liquid
Synonyms: BMIM Hydrogen Sulfate, 1-Butyl-3-Methylimidazolium Bisulfate
CAS Number: 262297-13-2
Supplier Name: Listed on packaging or shipping documentation
Emergency Contact: Local or national poison center, supplier's 24-hour emergency line, or chemist team
GHS Classification: Skin irritation (Category 2), Eye irritation (Category 2A), Specific Target Organ Toxicity (single exposure, Category 3), Aquatic Chronic (Category 3)
GHS Label Elements: Pictogram: Exclamation Mark, Signal Word: Warning
Hazard Statements: Causes skin irritation, causes serious eye irritation, may cause respiratory irritation, harm to aquatic life with long-lasting effects
Precautionary Statements: Avoid breathing vapor/mist/dust, wash hands thoroughly after handling, wear appropriate protective gloves and eye protection, avoid environmental release
Component: 1-Butyl-3-Methylimidazolium Hydrogen Sulfate
Concentration: ≥98 percent
CAS Number: 262297-13-2
Impurities: Minimal, typically water content below 2 percent, trace metals possible based on synthesis
Inhalation: Remove person to fresh air, keep comfortable for breathing, seek medical attention if symptoms persist
Skin Contact: Wash with soap and water for at least 15 minutes, remove contaminated clothing, consult physician if irritation develops
Eye Contact: Rinse cautiously with water for at least 20 minutes, ensure thorough flushing, remove contact lenses if present, seek immediate medical advice
Ingestion: Rinse mouth, do not induce vomiting, seek medical attention for discomfort
Most Important Symptoms and Effects (acute and delayed): Burning pain, stinging, redness, possible respiratory irritation, abdominal pain if ingested, prolonged exposure may damage organs
Suitable Extinguishing Media: Dry chemical, carbon dioxide, alcohol-resistant foam, or water spray
Special Hazards from Fire: May release toxic gases including CO, CO2, SOx, and nitrogen oxides
Firefighter Protective Measures: Firefighters need to wear full protective gear and self-contained breathing apparatus
Advice for Firefighters: Remove containers from fire area if it can be done without risk, avoid inhalation of decomposition products
Personal Precautions: Use chemical-resistant gloves, goggles, and suitable protective clothing, avoid contact with skin, eyes, and clothing
Environmental Precautions: Prevent entry into sewers or waterways, contain leak or spill using non-combustible absorbent materials
Methods for Cleanup: Collect spill with inert absorbent (e.g., sand, earth), place in chemical waste container, ventilate area, clean with water and detergent after material pickup
Safe Handling Recommendations: Keep containers tightly closed, handle in a well-ventilated area, avoid generating mist or aerosols, keep away from incompatible materials
Storage Recommendations: Store in a cool, dry place, keep container sealed, isolate from strong oxidizing and reducing agents, acids, and bases, protect from moisture and direct sunlight, store under inert atmosphere where possible
Other Considerations: Use only non-sparking tools, ground containers during transfer, label all containers clearly with content and hazard information
Occupational Exposure Limits: No established OSHA or ACGIH exposure limits for this compound
Engineering Controls: Use with local exhaust ventilation, keep workplace air clean to minimize exposure, use fume hoods or chemical extraction systems for open transfers
Personal Protective Equipment: Chemically resistant gloves (nitrile or neoprene), safety goggles or face shield, lab coat or apron, suitable respiratory protection in poorly ventilated areas, closed-toe footwear
Hygiene Measures: Wash hands, forearms, and face after handling, do not eat, drink, or smoke during work with this substance
Appearance: Clear to pale yellow liquid
Odor: Faint sulfurous or musty odor
pH: Acidic, typically below 2 in aqueous solution
Melting Point: Below room temperature (varies by purity and water content)
Boiling Point: Decomposes before boiling
Flash Point: > 180°C (closed cup, varies by sample and method)
Evaporation Rate: Negligible
Flammability: Not classified as flammable liquid
Vapor Pressure: Low, negligible at ambient temperature
Solubility: Miscible with water, soluble in polar organic solvents
Viscosity: High relative to water, varies with temperature and water content
Density: Approx. 1.2-1.3 g/cm³ at 25°C
Partition Coefficient (n-octanol/water): Expected low, ionic compounds do not partition significantly into octanol
Autoignition Temperature: Not established
Chemical Stability: Stable under normal storage and handling conditions, hydrolytically decomposes under strong acid or base
Reactivity: May react with strong oxidizing agents, strong acids, strong bases
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, sulfur oxides, nitrogen oxides, imidazole derivatives
Incompatible Materials: Strong oxidizers, reducers, Lewis acids, strong bases
Conditions to Avoid: Excessive heat, moisture, direct sunlight, sources of ignition
Acute Toxicity: Not fully characterized for this compound, but ionic liquids often present moderate toxicity by ingestion, inhalation or skin exposure
Skin Corrosion/Irritation: Causes irritation, risk of dermatitis upon prolonged contact
Eye Damage/Irritation: Serious risk for eye irritation, possible burns with concentrated material
Respiratory Sensitization: Extended or repeated inhalation may provoke cough, sore throat, or respiratory discomfort
Chronic Effects: Laboratory studies on imidazolium-based ionic liquids have shown potential effects on liver and kidney with chronic overexposure
Carcinogenicity: Not listed as a known or probable human carcinogen by IARC, NTP, or OSHA
Mutagenicity: No specific data, structurally related compounds do not indicate mutagenic potential in standard tests
Reproductive Toxicity: Insufficient data; standard laboratory precautions should be taken to minimize unnecessary exposure
Ecotoxicity: Imidazolium ionic liquids show moderate toxicity towards aquatic organisms, including daphnia and algae, may disrupt aquatic environments at high concentration
Persistence and Degradability: Not readily biodegradable, persists under normal landfill conditions, may undergo slow hydrolysis
Bioaccumulation Potential: Low; ionic materials tend to remain in water phase and show little tendency for bioaccumulation in aquatic food chains
Mobility in Soil: High, especially in wet environments, may migrate into groundwater
Other Adverse Effects: Caution warranted for disposal into aquatic systems; long-term environmental impact data remain limited
Disposal Methods: Collect liquid and absorbent waste into separate, clearly labeled hazardous waste container, handle using licensed chemical waste disposal contractor, comply with local, regional and national regulations
Contaminated Packaging: Decontaminate if possible or treat as hazardous waste, do not reuse empty containers
Additional Disposal Instructions: Do not discharge into drains, waters, or environment, incineration recommended only in permitted facilities with proper gas scrubbing to capture sulfur and nitrogen byproducts
UN Number: Not assigned for most forms; check recent transport regulations
Proper Shipping Name: Chemical, n.o.s. (contains 1-Butyl-3-Methylimidazolium Hydrogen Sulfate)
Transport Hazard Class: Not regulated under DOT, IMDG, or IATA for most shipments
Packing Group: Not assigned or not regulated commonly, verify based on local or international guidelines
Marine Pollutant: Not specifically regulated as a marine pollutant, limit release to environment
Special Precautions: Protect packaging from moisture and rough handling, label all shipments clearly with hazard information, carry material safety data sheet with all bulk shipments
TSCA Inventory: Not always listed, check supplier notification
EU REACH Status: May not be registered, verify with supplier or REACH database
OSHA Hazard Communication: Treated as hazardous chemical per criteria, use industrial hygiene controls
Other National/Regional Regulations: Varies; ensure compliance with chemical safety, handling, and waste laws of jurisdiction factored into site safety plan
Labeling Requirements: Ensure correct pictograms, risk phrases, and emergency contact details are always visible on use and storage containers
