Substance Name: 1H-Pyrrole
Synonyms: Pyrrole, Azole, Pyrole
CAS Number: 109-97-7
Molecular Formula: C4H5N
Molecular Weight: 67.09 g/mol
Recommended Uses: Intermediate for pharmaceuticals, organic synthesis, lab research
Supplier Details: Consult product label or data sheet for manufacturer contact
Emergency Contact: Local poison control or company emergency line
GHS Classification: Flammable liquid, acute toxicity (oral, inhalation, dermal), skin and eye irritant
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor, harmful if swallowed or in contact with skin, causes skin and eye irritation, may cause respiratory irritation
Pictograms: Flame, exclamation mark
Precautionary Statements: Keep away from heat, sparks, open flames; avoid breathing vapors; use only outdoors or in a well-ventilated space; wear protective gloves, clothing, eye/face protection; wash hands thoroughly after handling
Chemical Name: 1H-Pyrrole
Concentration: ≥ 99%
Impurities: Small trace organics possible, typically < 1%
Other Components: None intentionally present
Stabilizers or Additives: None typically needed
General Advice: Move injured person out of contaminated area; remove contaminated clothing
Inhalation: Move to fresh air right away, seek medical help if breathing issues show
Skin Contact: Wash skin with plenty of water and soap, don't use solvents, get checked if irritation or allergic reactions show
Eye Contact: Rinse eyes slowly and gently with water for twenty minutes, keep eyelids open, reach out for medical care when symptoms linger
Ingestion: Rinse mouth, avoid vomiting, call a doctor or poison center quickly
Most Important Symptoms: Coughing, irritation, dizziness, headache
Immediate Attention: Respiratory distress, severe skin contact, long-term symptoms demand prompt care
Suitable Extinguishing Media: Use dry chemical powder, foam, carbon dioxide; avoid water sprays on product spills
Special Hazards: Vapors may form explosive mixtures with air, fire can produce toxic gas like nitrogen oxides and carbon monoxide
Fire-Fighting Instructions: Approach from upwind, isolate area, cool tanks with water from distance, use air-supplied respirators, evacuate downwind if fire grows
Protective Equipment: Full firefighting suit, self-contained breathing apparatus required for indoor or thick smoke
Personal Precautions: Ventilate affected space, block off entry points, stay upwind, avoid breathing or touching leaked chemical, wear protective gear
Spill Containment: Stop leak if safe, dike area with non-flammable material, place absorbent barriers
Clean-Up Methods: Soak up spill with inert absorbent (like sand or vermiculite), collect material in labeled metal containers, wash area with water to dilute residue, don't let chemical reach drains
Environmental Precautions: Keep away from waterways, drainage, soil; alert local authorities if spill spreads outside controlled boundaries
Safe Handling: Operate in chemical fume hood or outdoor space, ground containers when pouring, avoid ignition sources, keep caps tight on bottles, never eat or drink near work site, wash body parts with soap and water after handling
Storage Requirements: Store in cool, dry, ventilated area away from sunlight, keep away from oxidizers, acids, open flames, use containers made from compatible material, mark and date bottles, never return unused chemical to original container, keep out of children's reach
Occupational Exposure Limits: No OSHA PEL or ACGIH TLV set; general industry practices suggest TWA < 1 ppm
Engineering Controls: Fume hood or explosion-proof ventilation for indoor work, splash guards near work zone, eyewash and safety shower nearby
Personal Protection Equipment: Flame-resistant lab coat, nitrile or neoprene gloves, chemical splash goggles, use respiratory protection (NIOSH/MSHA approved) when vapor levels rise above limits, antistatic shoes recommended in flammable environments, never use open flames or non-certified electrical gear
Physical State: Liquid
Color: Colorless to light yellow
Odor: Slightly fishy, ammoniacal
Melting Point: -23 °C
Boiling Point: 129 °C
Flash Point: 31 °C (closed cup)
Auto-Ignition Temperature: 360 °C
Flammability: Highly flammable
Vapor Pressure: 15 mmHg at 20 °C
Solubility: Readily dissolves in alcohol, ether, benzene, less so in water
Density: 0.967 g/cm3
pH: Slightly basic in water
Evaporation Rate: Moderate, like solvents
Viscosity: Low viscosity liquid
Chemical Stability: Stays stable under normal handling temperatures when kept away from light and air
Conditions to Avoid: Heat, sparks, open flames, long exposure to sun or strong light
Incompatible Materials: Strong oxidizing agents, strong acids, some halogens, peroxides, nitrogen oxides
Hazardous Decomposition: Exposes users to toxic fumes like nitrogen oxides, carbon monoxide if burnt or broken down
Possibility of Hazardous Reactions: May polymerize or react violently with oxidizers or acids; store away from reactive substances
Likely Routes of Entry: Inhalation, skin absorption, eye contact, ingestion
Acute Effects: Headache, nausea, tearing, short breathing, irritation of skin/eyes/lungs
Chronic Effects: May sensitize skin; repeated exposure affects liver, kidneys, central nervous system
LD50 (Oral, Rat): Roughly 112 mg/kg
Symptoms of Overexposure: Dizziness, confusion, potential blue tinge to lips
Carcinogenicity: Not classified by IARC, NTP, OSHA
Other Information: No known reproductive hazard, use only as needed, limit duration/frequency of exposure
Aquatic Toxicity: Harmful to fish and aquatic invertebrates (acute and chronic data limited)
Persistence and Degradability: Not expected to persist long; breaks down in water and air over time
Bioaccumulation: Unlikely to build up much in most living organisms
Ecotoxicology Notes: Runoff can lower oxygen supply in ponds/rivers; avoid large spills into natural water
Soil Mobility: May leach through soil but tends to break down quickly
Other Hazards: Impacts depend on local water chemistry and spill size; never pour unused chemical into drains
Disposal Methods: Incinerate in licensed chemical incinerator with afterburner, observe all local/state/federal rules—never pour into regular trash or sewers
Container Disposal: Rinse, triple-wash, and dispose as hazardous waste; puncture and flatten after cleaning
Other Recommendations: Small spills can be absorbed and sealed in drums for transport; follow EPA, RCRA, and regional requirements for all 1H-pyrrole material
UN Number: UN3295
Proper Shipping Name: Hydrocarbons, liquid, n.o.s. (contains 1H-pyrrole)
Hazard Class: 3 (Flammable liquids)
Packing Group: II
Labels: Flammable liquid
Special Transport Precautions: Use containers approved for flammable chemicals, keep away from oxidizers during shipping, mark clearly and ensure transport paperwork lists hazard codes, avoid rough handling or dropping containers; check national/international rules before shipment
TSCA Status: Listed in US Toxic Substances Control Act Inventory
SARA Title III (Sections 302, 313): Not an extremely hazardous substance; not subject to reporting under Section 313
OSHA: Regulated as hazardous material, subject to workplace chemical safety standards
European Union: Listed in EINECS (203-724-7), classified under CLP as flammable liquid (Cat 2) and acute toxic
Canada: WHMIS Category B2 (Flammable liquid), D1B (Toxic material—immediate/serious effects)
Other Details: Users must follow all local, state, and national chemical safety requirements, keep all safety information updated as laws change
