Product Name: 1-Ethyl-1H-Imidazole
Synonyms: N-Ethylimidazole
Chemical Family: Heterocyclic organic base
Recommended Uses: Chemical synthesis, research, pharmaceutical intermediate
CAS Number: 709-07-3
Supplier Details: Usually listed by a lab chemical provider, including address, phone, and emergency number
Emergency Phone Number: CHEMTREC International: +1 703-527-3887 or equivalent national emergency contact
GHS Classification: Flammable liquid, Skin irritation, Eye irritation, Acute toxicity oral
Pictograms: Flame, Exclamation Mark
Signal Word: Warning
Hazard Statements: Highly flammable liquid and vapor, causes skin irritation, causes serious eye irritation, harmful if swallowed
Precautionary Statements: Keep away from heat/sparks/open flames, avoid breathing fumes, wear protective gloves, eye protection, use only outdoors or in a well-ventilated area
Potential Health Effects: Skin contact may result in redness and irritation, eye contact can cause burning and watering, inhalation may cause coughing, ingestion can lead to gastrointestinal distress
OSHA Classification: Hazardous chemical
Chemical Name: 1-Ethyl-1H-Imidazole
Common Name: N-Ethylimidazole
Concentration: 98% or higher (technical grade or above)
Impurities: Water (<1%), minor imidazole derivatives (<0.5%)
Molecular Formula: C5H8N2
Molecular Weight: 96.13 g/mol
General Advice: Move affected person from exposure, keep at rest
Inhalation: Move victim to fresh air, administer oxygen if breathing is difficult, seek medical attention if symptoms persist
Skin Contact: Wash thoroughly with plenty of water and soap for at least 15 minutes, remove contaminated clothing
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses, continue rinsing, seek medical help
Ingestion: Rinse mouth with water, do not induce vomiting, seek immediate medical attention
Note to Physicians: Treat symptomatically, ensure supportive care
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, alcohol-resistant foam
Unsuitable Extinguishing Media: Water jet (may spread fire)
Special Hazards: Vapors may form explosive mixtures with air, container may rupture in heat
Hazardous Combustion Products: Nitrogen oxides, carbon monoxide, carbon dioxide, imidazole vapors
Protective Equipment: Firefighters should wear self-contained breathing apparatus with full protective gear
Fire-Fighting Instructions: Cool containers with water spray to prevent pressure build-up
Personal Precautions: Evacuate unnecessary personnel, ventilate area, use chemical-resistant gloves, splash goggles, lab coat
Environmental Precautions: Prevent spillage from entering drains, soil, or water bodies
Cleanup Methods: Absorb spill with inert material like sand or vermiculite, place in chemical waste container
Decontamination: Wash spill site with plenty of water and neutral detergent after material pickup
Reporting: Notify environmental authorities if large spills occur
Precautions for Safe Handling: Avoid breathing vapors or contact with skin and eyes, use in well-ventilated area or fume hood, keep away from heat/sparks/flames, do not eat, drink, or smoke when handling
Storage Conditions: Store in tightly closed original container, in cool, dry, well-ventilated area away from incompatible materials like oxidizers, acids, and bases
Incompatibilities: Strong oxidizers, strong acids, alkali metals
Storage Temperature: Recommended below 25°C
Shelf Life: Up to two years if stored properly
Occupational Exposure Limits: No official OSHA or ACGIH limits established for this specific compound
Engineering Controls: Use chemical fume hood, equipment with explosion-proof electrical fixtures
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene), safety goggles or face shield, lab coat, appropriate respiratory protection in case of insufficient ventilation or overexposure
Hygiene Measures: Wash hands thoroughly after handling, remove and wash contaminated clothing before reuse
Monitoring: Regular checks of air quality and surface contamination as good practice
Appearance: Clear, colorless to pale yellow liquid
Odor: Ammonia-like, irritating
Odor Threshold: Not determined
pH: Weakly basic in aqueous solution
Melting Point: -60°C
Boiling Point: 206°C
Flash Point: 97°C (closed cup)
Evaporation Rate: Not available
Flammability: Flammable liquid
Upper/Lower Flammability Limits: No data available
Vapor Pressure: 0.5 mmHg @ 25°C
Vapor Density: 3.3 (air = 1)
Relative Density: 0.999 g/cm³
Solubility in Water: Miscible
Partition Coefficient (log Kow): 0.03
Auto-Ignition Temperature: 470°C
Decomposition Temperature: Not specifically determined
Viscosity: Not available
Chemical Stability: Stable under recommended storage conditions
Possibility of Hazardous Reactions: Can react violently with strong oxidizing agents, may form explosive mixtures with air
Conditions to Avoid: Heat, sparks, flames, sources of ignition, contact with incompatible materials
Incompatible Materials: Strong oxidizers, acids, alkali metals
Hazardous Decomposition Products: Carbon oxides, nitrogen oxides, toxic fumes
Polymerization: Not known to occur
Acute Toxicity: LD50 (oral, rat): >300 mg/kg; oral exposure may cause nausea, vomiting, abdominal pain
Skin Corrosion/Irritation: Causes irritation with possible dermatitis
Eye Damage/Irritation: Risk of serious damage, redness, and severe irritation
Respiratory Sensitization: Not classified, but vapors may irritate mucous membranes
Skin Sensitization: No data
Germ Cell Mutagenicity: No relevant data available
Carcinogenicity: Not listed by NTP, IARC, OSHA
Reproductive Toxicity: No systematic studies; use precaution
Target Organ Effects: Eyes, skin, respiratory tract
Chronic Effects: Long-term repeated exposure may cause drying and cracking of skin, possible kidney or liver stress with large or repeated ingestion
Ecotoxicity: Little data; expected moderate toxicity to aquatic organisms due to basic nitrogen content
Persistence and Degradability: Readily biodegradable under typical environmental conditions
Bioaccumulative Potential: Low (log Kow = 0.03)
Soil Mobility: Likely moderate mobility due to solubility in water
Other Adverse Effects: Possible increase in nutrient loading or pH if large spill reaches freshwater
Special Precautions: Prevent release to the environment beyond laboratory or industrial use
Waste Disposal: Use chemical waste containers, do not pour into drains
Disposal Methods: Incinerate in accordance with local, regional, and national regulations
Contaminated Packaging: Rinse thoroughly, offer for recycling if possible, otherwise treat as chemical waste
Environmental Caution: Avoid uncontrolled disposal to surface water, sewer system, or soils
Document Disposal: Maintain records according to best practice, especially for larger quantities
UN Number: UN 1993
Proper Shipping Name: Flammable liquid, n.o.s. (contains 1-Ethyl-1H-Imidazole)
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: III
Marine Pollutant: Not classified as marine pollutant
Special Precautions: Keep container tightly sealed, handle with care, secure to prevent leaks
Regulatory Transport Label: Flammable liquid, keep away from oxidizers
OSHA Status: Considered hazardous chemical under OSHA Hazard Communication Standard
TSCA Status: Listed in the US Toxic Substances Control Act Inventory
SARA Section 313: Not subject to reporting
REACH/EU: Included on REACH registered substances, consult ECHA database
California Proposition 65: Not on the Proposition 65 list
WHMIS (Canada): Flammable liquid, moderate/acute toxicity
Other National/International Regulations: Review each country’s requirements for registration, transport, and workplace control
