Product Name: N-Methylimidazolium Dihydrogen Phosphate
Chemical Family: Ionic liquid
Recommended Use: Laboratory reagent, industrial solvent
Supplier: Manufacturer or distributor details
Emergency Contact: Local emergency response or poison control center
CAS Number: 255474-81-8
Synonyms: N-Methylimidazolium phosphate, 1-Methylimidazolium dihydrogen phosphate
Product Code: IMS-0123
Relevant Identified Uses: Specialty solvent, electrolyte, catalysis
Restrictions of Use: Not for food, drug, or household use
Classification: Acute toxicity (oral, category 4), Skin irritation (category 2), Eye damage (category 1)
Signal Word: Danger
Hazard Statements: Harmful if swallowed, causes skin irritation, causes serious eye damage
Pictograms: Exclamation mark, Corrosive
Precautionary Statements: Avoid breathing dust or vapors, wash hands thoroughly after handling, wear protective gloves and eye/face protection, rinse skin or eyes immediately in case of contact
Routes of Exposure: Inhalation, ingestion, skin, eye
Potential Health Effects: Coughing, burning sensation, redness, serious eye injury
Environmental Hazards: May be harmful to aquatic life
OSHA Hazards: Corrosive, harmful if swallowed or inhaled
Chemical Name: N-Methylimidazolium Dihydrogen Phosphate
CAS Number: 255474-81-8
Concentration: ≥ 98%
Molecular Formula: C4H9N2O4P
Hazardous Components: None established above reportable levels aside from main substance
Impurities: Less than 2%, not classified
Description: Homogeneous ionic liquid salt, clear or pale yellow color
General Advice: Move affected person to fresh air, seek medical help immediately
Inhalation: Remove to fresh air, monitor for respiratory distress, call for medical attention if symptoms persist
Skin Contact: Remove contaminated clothing, wash thoroughly with soap and water, contact doctor for persistent irritation
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, hold eyelids open, get medical attention
Ingestion: Rinse mouth with water, do not induce vomiting, seek medical help
Most Important Symptoms: Eye and skin burns, gastric irritation, shortness of breath
Protective Measures: Medical staff should use personal protection and avoid direct exposure
Notes to Physician: Treat symptomatically, monitor airway and breathing
Suitable Extinguishing Media: Dry chemical, foam, carbon dioxide, water spray
Extinguishing Media Not to Use: Direct water jets can spread material
Specific Hazards: Decomposition releases toxic fumes of phosphorus oxides, nitrogen oxides, carbon monoxide
Protective Equipment: Full protective gear and self-contained breathing apparatus
Fire Fighting Methods: Approach from upwind, contain run-off
Thermal Decomposition: Risk of irritating or corrosive gases during combustion
Explosion Risk: Not expected under normal conditions
Personal Precautions: Evacuate area, ventilate, avoid breathing vapors or dust, wear chemical resistant gloves and goggles
Spill Containment: Stop leak if safe, prevent entry into drains or waterways, build dikes for large spills
Cleanup Methods: Absorb with inert material (sand or earth), collect in closed containers for disposal
Decontamination: Wash reusable gear with plenty of water before next use
Environmental Protection: Notify authorities if material enters water or soil, use booms for containment
Emergency Procedures: Restrict area to trained personnel only, refer to fire-fighting section for possible hazards
Handling: Use adequate ventilation, avoid contact with skin and eyes, never eat, drink, or smoke when handling chemical
Personal Hygiene: Wash hands and exposed skin after use, remove contaminated clothing and wash before reuse
Storage Conditions: Store away from heat, sparks, and open flame, keep tightly closed in original container
Temperature Requirements: Store at ambient temperature, keep dry
Incompatible Materials: Strong oxidizers, strong bases, strong reducing agents, water-reactive substances
Container Requirements: Use corrosion-resistant, leak-proof containers, label containers clearly
Packaging Materials: Compatible with glass, high-density polyethylene
Occupational Exposure Limits: None established specifically for this material
Engineering Controls: Local mechanical exhaust, safety showers, eyewash stations in area
Personal Protection - Eyes: Chemical safety goggles with side shields
Personal Protection - Hands: Impermeable gloves (nitrile or neoprene)
Personal Protection - Clothing: Laboratory coat, chemical-resistant apron for larger quantities
Respiratory Protection: Use NIOSH-approved respirator if vapor or dust exceeds permitted levels
Environmental Controls: Closed systems, prevent unnecessary release to the environment
Other Safety Measures: Do not permit contact with unprotected skin or mucous membranes
Physical State: Liquid
Appearance: Colorless to pale yellow
Odor: Mild, characteristic
Molecular Weight: 180.10 g/mol
Melting Point: Below room temperature
Boiling Point: Not determined, decomposes
Vapor Pressure: Negligible at ambient temperatures
Density: Approximately 1.30–1.35 g/cm³
Solubility: Miscible with water, limited solubility in non-polar solvents
pH (solution): 2–3 (aqueous solution)
Flash Point: No data available
Viscosity: High relative to water
Partition Coefficient: Not available
Decomposition Temperature: Above 180°C
Auto-ignition Temperature: Not established
Evaporation Rate: Very slow, due to ionic nature
Chemical Stability: Stable under normal handling and storage conditions
Reactivity: May react with strong oxidizing agents or bases, liberates toxic fumes under fire
Conditions to Avoid: Excessive heat, open flames, moisture, incompatible chemicals
Hazardous Decomposition Products: Phosphoric acid, nitrogen oxides, carbon monoxide, methylamine under extreme heat
Polymerization: Not anticipated
Incompatible Materials: Metals, organometallic compounds, peroxides
Corrosivity: Corrosive to certain metals, especially under humid conditions
Likely Routes of Exposure: Ingestion, skin, eyes, inhalation
Acute Toxicity: LD50 (oral, rat): Estimated 300–2000 mg/kg
Skin Irritation: Causes redness, irritation, burns with prolonged exposure
Eye Damage: Causes severe damage, possible irreversible injury
Respiratory Sensitization: May cause coughing, throat irritation
Chronic Effects: No reliable long-term studies, repeated exposures may cause dermatitis
Carcinogenicity: Not listed as carcinogenic by IARC, NTP, OSHA
Mutagenicity and Reproductive Toxicity: No data
Target Organs: Eyes, skin, mucous membranes
Eco-toxicity: Harmful to aquatic organisms at elevated concentrations
Persistence and Degradability: Ionic liquid, potential for persistence in soil/water if not diluted or neutralized
Bioaccumulation: No specific bioaccumulation expected due to hydrophilicity
Mobility in Soil: High mobility in water, can leach to ground and affect aquatic systems
Aquatic Toxicity: Estimated (based on similar compounds): LC50 (fish, 96h) < 50 mg/L
Degradation Products: Phosphate ions, low molecular organics
Other Adverse Effects: Ingredient phosphate can contribute to eutrophication in large spills
Soil Exposure: May alter soil properties and bioactivity if spilled
Disposal Methods: Dispose through permitted chemical waste contractor, comply with local environmental regulations
Unused Product: Treat as hazardous waste unless neutralized
Contaminated Packaging: Rinse, soak with water, dispose of as hazardous chemical waste
Sewage Disposal: Do not pour into drains or waterways
Incineration: Suitable for destruction only in licensed facilities
Special Precautions: Prevent mixing with incompatible waste streams
Regulatory Requirements: Label all containers, provide proper documentation for transport and disposal
UN Number: Not classified under UN transport rules in small quantities
Proper Shipping Name: Chemical, n.o.s. (contains N-Methylimidazolium Dihydrogen Phosphate)
Transport Hazard Class: 8 (Corrosive), if classified in bulk or concentrated solutions
Packing Group: III
Environmental Hazards: Not a marine pollutant under current regulations
Special Precautions for Transport: Avoid contact with acids and bases during transport, protect from mechanical damage
Road/Rail (ADR/RID): Regulated as corrosive
Marine (IMDG): Check classification for large shipments
Air (IATA): Subject to limitations, must declare corrosive if shipping bulk quantities
Container Labeling: UN standard corrosive pictograms, emergency contact details
Regulatory Status: Not specifically listed on TSCA, EINECS, or AICS, used for research and industrial applications
OSHA: Classified as hazardous chemical under worker protection rules
SARA Title III: Not listed under specific SARA sections for chemicals at routine quantities
RCRA Classification: Subject to hazardous waste rules if discarded in bulk
REACH Registration: Consult supplier for pre-registration status
WHMIS Classification (Canada): D2B (toxic material causing other effects), E (corrosive products)
Right-to-Know Information: Included as corrosive material in many state chemical right-to-know lists
Local Requirements: Check local chemical safety and environmental compliance obligations
Label Elements: Product name, hazard symbols, signal word, hazard statements, safety instructions
