Product Name: 1-Butyl-3-Methylimidazolium Methanesulfonate
Synonyms: BMIM Methanesulfonate, [BMIM][MS]
Chemical Formula: C9H18N2O3S
CAS Number: 408819-37-0
Recommended Use: Laboratory chemicals, electrolyte solutions, green solvents
Manufacturer Contact: Contact information of the supplier should be readily available on the product label or certificate of analysis.
Emergency Phone Number: Local poison control or company-provided emergency hotline
GHS Classification: Eye irritation, Category 2A; Skin irritation, Category 2; Specific target organ toxicity – single exposure, Category 3
Signal Word: Warning
Hazard Statements: Causes serious eye irritation, causes skin irritation, may cause respiratory irritation
Pictograms: Exclamation mark
Precautionary Statements: Avoid contact with eyes, skin, clothing; avoid inhalation of dust, vapors, or spray mist; wash thoroughly after handling; use only outdoors or in well-ventilated area
Other Hazards: Not classified as a combustible material, though thermal decomposition releases toxic fumes.
Chemical Name: 1-Butyl-3-Methylimidazolium Methanesulfonate
CAS Number: 408819-37-0
EC Number: Not available
Concentration: ≥98%
Impurities: Trace imidazolium compounds, water content < 0.5%
Eyes: Immediately flush with water for at least 15 minutes, hold eyelids open, seek medical attention if irritation develops or persists
Skin: Remove contaminated clothing, wash affected area with plenty of water and soap, seek medical attention if irritation occurs
Inhalation: Move person to fresh air, keep at rest, seek medical attention if symptoms persist, provide oxygen or artificial respiration if needed
Ingestion: Rinse mouth, do not induce vomiting, give water if conscious, seek immediate medical attention
Self-Protection for First Aiders: Wear nitrile gloves and safety goggles; prevent secondary exposure
Suitable Extinguishing Media: Water spray, carbon dioxide, foam, dry chemical powder
Unsuitable Extinguishing Media: Direct water stream if large quantities spilled; risk of spreading materials
Fire Hazards: Decomposes above 290°C, forms toxic and corrosive gases including oxides of sulfur, nitrogen, carbon monoxide
Protective Equipment for Firefighters: Self-contained breathing apparatus (SCBA) and full protective clothing
Special Procedures: Prevent run-off from entering sewers and waterways, cool containers exposed to fire with water spray
Personal Precautions: Wear appropriate chemical-resistant gloves, goggles, and laboratory coat; avoid dust formation and inhalation
Environmental Precautions: Prevent material from entering drains, sewers, or waterways
Clean-up Methods: Absorb with inert material (sand, diatomaceous earth), place in chemical waste container, ventilate spill area, wash area with water after cleanup
Emergency Procedures: Evacuate unnecessary personnel, provide adequate ventilation, notify responsible authorities if release exceeds local reporting thresholds
Handling Precautions: Wear gloves, goggles, and protective clothing; handle in a chemical fume hood or well-ventilated area; avoid breathing dust, vapor, or mist; avoid contact with skin and eyes
Storage Conditions: Keep tightly closed in original container, store in a cool, dry, well-ventilated place, separate from oxidizers, acids, and moisture
Storage Temperature: Recommended between 2°C and 8°C; avoid freezing or exposure to direct sunlight
Incompatible Materials: Strong oxidizing agents, strong acids, bases
Engineering Controls: Use fume hood, ensure adequate mechanical ventilation in the area of use, have eyewash and safety shower stations available
Personal Protective Equipment: Chemical-resistant gloves (nitrile recommended), safety goggles, lab coat or apron, impervious shoes
Respiratory Protection: Use approved respirator if inhalation risk exists; otherwise use local exhaust ventilation
Exposure Limits: No regulatory exposure limits established
Hygiene Measures: Do not eat, drink, or smoke when using this product, wash hands and face after handling, remove contaminated clothing and wash before reuse
Appearance: Colorless to pale yellow liquid or low-melting solid
Odor: Mild, non-descript
Melting Point: 17°C–25°C
Boiling Point: Decomposes > 290°C, does not distil under atmospheric pressure
Density: 1.13–1.17 g/cm³ at 20°C
Solubility: Miscible with water, soluble in polar organic solvents
Flash Point: Above 190°C
Viscosity: 70–100 mPa·s at 25°C
Vapor Pressure: Negligible at room temperature
pH: Neutral to slightly acidic in aqueous solution
Chemical Stability: Stable under standard conditions, sensitive to strong oxidizing agents
Conditions to Avoid: Moisture, excessive heat, open flames, incompatible materials
Incompatible Materials: Strong oxidizers, strong mineral acids, alkalis
Hazardous Decomposition Products: Sulfur oxides, nitrogen oxides, carbon monoxide, carbon dioxide, methylsulfonic acid
Polymerization: Hazardous polymerization will not occur
Acute Toxicity: Oral LD50 (rat): >5000 mg/kg (estimated); not acutely toxic by ingestion in small quantities
Skin Corrosion/Irritation: Causes skin irritation after prolonged or repeated exposure
Serious Eye Damage/Irritation: Causes eye irritation, may lead to redness, tearing
Respiratory Sensitization: May cause irritation to mucous membranes and upper respiratory tract
Inhalation: Excessive dust or vapor exposure can cause respiratory irritation
Chronic Effects: No information on carcinogenicity, mutagenicity, or reproductive toxicity available; prolonged contact may lead to dermatitis
Target Organs: Eyes, skin, respiratory tract
Ecotoxicity: Not classified as hazardous to the aquatic environment based on available data; aquatic toxicity LC50/EC50 (fish, daphnia, algae): > 100 mg/L (literature reports)
Persistence and Degradability: Readily biodegradable under aerobic conditions (confirmed in closed-bottle tests)
Bioaccumulative Potential: Potential for bioaccumulation low, log Kow estimated below 2
Mobility in Soil: Highly soluble, may leach through soil to groundwater
Other Adverse Effects: Data suggest substitution for volatile organic solvents reduces overall environmental impact, though releases into water systems should be minimized to prevent local effects
Waste Disposal Methods: Collect and transfer to approved chemical disposal facility; treatment methods can involve incineration under controlled conditions
Container Disposal: Triple rinse and offer for recycling or reconditioning if possible, otherwise dispose in accordance with local, regional, national regulations
Environmental Precautions: Avoid discharge to drains, surface waters, and soils
Regulatory Disposal Information: Not classified as hazardous waste under RCRA, but consult local waste disposal authority for full compliance
UN Number: Not regulated as a dangerous good under ADR, IMDG, IATA
Proper Shipping Name: Not applicable
Transport Hazard Class(es): Not applicable
Packing Group: Not applicable
Environmental Hazards: Not considered marine pollutant
Special Precautions: Ship in well-closed, appropriately labeled containers to prevent leakage or contamination
TSCA: Not listed on the U.S. Toxic Substances Control Act (TSCA) inventory; for research and development use only
REACH Status: Not registered, limited to research applications under REACH (European Union)
SARA Title III: Not listed as an extremely hazardous substance, no reporting thresholds
OSHA Hazard Communication: Meets criteria for hazardous chemical; proper labeling and staff training recommended
Other Regulations: Not in state or national chemical control lists; consult with local authorities for use in specific applications
Labeling Requirements: Comply with workplace labeling, safety posters, and hazard communication standards in country of use
