Product Name: 1-Methylpyrrole
Synonyms: N-Methylpyrrole, Methyl-1H-pyrrole
Chemical Family: Heterocyclic Compound
CAS Number: 96-43-5
Molecular Formula: C5H7N
Recommended Use: Used as a solvent, intermediate in organic synthesis, and research chemical
Supplier Details: Check label for manufacturer and distributor contacts; usually includes address, emergency phone number, email
Emergency Overview: Clear to pale yellow liquid, pungent smell
GHS Classification: Flammable liquid (Category 3), Acute toxicity, oral (Category 4), Skin and eye irritant
Label Elements: Hazard pictograms (flame, exclamation mark); Signal word: Warning
Hazard Statements: Flammable liquid and vapor; Harmful if swallowed; Causes skin and eye irritation
Precautionary Statements: Keep away from sparks and open flames; Wear protective gloves; Avoid breathing vapors; Wash hands thoroughly after handling
Routes of Exposure: Skin, eyes, ingestion, inhalation
Symptoms of Exposure: Eye and skin redness, headache, nausea, dizziness, respiratory discomfort
Chemical Name: 1-Methylpyrrole
Concentration: ≥99%
CAS Number: 96-43-5
Impurities: Usually present at <1%, listed on batch-specific documentation
Other Hazardous Components: None above reporting thresholds
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes; remove contact lenses if present and easy to do; seek medical advice for persistent irritation
Skin Contact: Remove contaminated clothing; wash affected skin with plenty of soap and water; seek medical help for burns or if irritation continues
Inhalation: Move person to fresh air; keep comfortable for breathing; contact physician if symptoms persist
Ingestion: Rinse mouth; never give anything by mouth to an unconscious person; contact poison center or get immediate medical attention
Signs of Acute Exposure: Burning sensation, coughing, upset stomach, breathing difficulty
Suitable Extinguishing Media: Alcohol-resistant foam, carbon dioxide, dry chemical powder; water spray for cooling
Unsuitable Media: Avoid direct water jet; may spread fire
Fire and Explosion Hazards: Vapors may form explosive mixtures with air; containers may burst in heat
Protective Equipment: Full protective gear and self-contained breathing apparatus for firefighters
Special Hazards: Gives off toxic fumes of nitrogen oxides and carbon monoxide during combustion
Instructions: Evacuate area, fight fire from a safe distance, stop leak if possible without risk
Personal Protection: Wear chemical goggles, gloves, long sleeves, respirator if ventilation is poor
Environmental Precautions: Prevent further leakage, keep out of waterways and drains
Containment: Eliminate ignition sources; use sand or inert absorbent material to contain spill
Clean-Up Procedure: Scoop up with non-sparking tools; place waste in labeled, closed container for proper disposal; ventilate area
Decontamination: Wash contaminated surfaces with water and detergent
Precautions for Safe Handling: Work in well-ventilated area; keep away from heat, sparks, open flame; avoid breathing vapors or direct contact; use spark-proof equipment
Hygiene Practices: Wash hands and exposed skin after handling; do not eat, drink, or smoke near product
Storage Conditions: Store in tightly closed container away from sunlight, strong acids, oxidizers, and ignition sources; keep at room temperature in dry, cool, and well-ventilated place; label storage area properly
Incompatibilities: Strong oxidizing agents, acids, halogens
Occupational Exposure Limits: No established OSHA, ACGIH, or NIOSH exposure limits; treat as hazardous chemical; minimize exposure
Engineering Controls: Local exhaust ventilation; use explosion-proof electrical systems; avoid confined spaces
Personal Protective Equipment: Safety goggles, chemical-resistant gloves (nitrile or neoprene), flame-resistant lab coat, and appropriate respiratory protection under low ventilation conditions
General Safety Measures: Emergency shower and eyewash station nearby; keep containers tightly sealed
Appearance: Colorless to pale yellow liquid
Odor: Mildly ammonia-like or pungent
Odor Threshold: Not established
pH: Not available
Melting Point: -24°C
Boiling Point: 111°C
Flash Point: 25°C (77°F, closed cup)
Flammability: Flammable liquid
Explosion Limits: Lower: 1.8%, Upper: 11.5% (estimated)
Vapor Pressure: 10 mmHg at 25°C
Vapor Density: 2.4 (air = 1)
Relative Density: 0.97 (water = 1)
Solubility: Soluble in water, ethanol, ether
Partition Coefficient (Log Pow): 0.43
Viscosity: Not available
Auto-ignition Temperature: >300°C
Decomposition Temperature: Not available
Chemical Stability: Stable under recommended storage conditions; reacts strongly in the presence of acids, oxidizers
Reactivity: Can react dangerously with acid chlorides, strong oxidizers, halogens
Hazardous Decomposition: Produces nitrogen oxides, carbon monoxide, carbon dioxide in fire
Polymerization: Not likely under normal conditions
Other Conditions to Avoid: Avoid static discharge, exposure to air or moisture; containers should remain sealed
Acute Toxicity: Oral LD50 (rat): ~400 mg/kg; inhalation LC50 (rat): not established
Skin Corrosion/Irritation: May cause moderate to severe irritation on contact
Eye Damage/Irritation: Causes irritation, redness, possible burns
Sensitization: Not expected with normal handling, but repeated contact may cause allergic reaction
Chronic Effects: No comprehensive animal or human studies; excessive exposure could cause neurological symptoms
Other Symptoms: At larger doses, drowsiness, disorientation, nausea, liver and kidney stress
Ecotoxicity: Toxic to aquatic organisms, especially in high concentrations
Aquatic Toxicity: LC50 (fish, 96h): estimated 40-70 mg/L
Persistence and Biodegradability: Somewhat biodegradable but may persist at high concentrations
Bioaccumulation Potential: Low to moderate potential; partition coefficient indicates possible mobility
Mobility in Soil: Likely to leach into groundwater if not managed properly
Other Effects: Avoid uncontrolled release into environment, use secondary containment for storage and transfer
Waste Methods: Dispose as hazardous organic solvent in approved facility; comply with local, state, and federal laws
Containers: Triple rinse empty containers and offer for recycling or reconditioning if possible
Precautions: Do not pour down drain, into soil, or storm sewers; incinerate under controlled conditions
Special Instructions: Collect all spill residues and contaminated absorbents as hazardous waste; label and handle according to regulations
UN Number: UN1993
Proper Shipping Name: Flammable Liquid, N.O.S. (contains 1-methylpyrrole)
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: III
Label Requirements: Flammable liquid label; include “Marine Pollutant” if shipping by sea
Environmental Hazards: Not a marine pollutant under IMDG, but avoid any spills
Special Transport Precautions: Store upright, keep containers tightly sealed, segregate from food and strong oxidizers
TSCA: Listed on US Toxic Substances Control Act inventory
SARA Title III: Not listed as extremely hazardous; report releases above threshold limits
OSHA: Regulated as hazardous chemical
DSL/NDSL (Canada): Listed/subject to reporting
REACH (EU): Not registered for high tonnage, use restricted to research and development; safety report recommended
Other International: Meets most national hazardous substance listing requirements; restricted transport may apply in some regions
Labeling: Requires flammable and toxic warning pictograms; include handling and first-aid statements on containers
