Product Name: 2-Acetylpyrrole
CAS Number: 1072-83-9
Synonyms: 1-(1H-Pyrrol-2-yl)ethanone; 2-Pyrrole Methyl Ketone
Recommended Use: Flavor and fragrance intermediate, laboratory reagent
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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
Precautionary Statements: Wear protective gloves and clothing, Avoid breathing vapors, Wash hands after handling, Use only outdoors or in a well-ventilated area
Hazards Not Otherwise Classified: None reported for normal conditions of use
Chemical Name: 2-Acetylpyrrole
Chemical Formula: C6H7NO
Molecular Weight: 109.13 g/mol
Impurities: Less than 1% by weight, may include trace solvents used in synthesis
Concentration: Greater than 98% 2-Acetylpyrrole by weight
General Advice: Move exposed person to fresh air; seek medical attention if symptoms persist
Inhalation: Remove person from exposure area to fresh air; if breathing is difficult, oxygen or artificial respiration may be needed; see a physician
Eye Contact: Rinse eyes gently with water for at least 15 minutes, keeping eyelids open; remove contact lenses if present
Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing and wash before reuse
Ingestion: Rinse mouth with water; do not induce vomiting; provide water to drink; get medical advice if feeling unwell
Suitable Extinguishing Media: Use dry chemical, foam, or carbon dioxide; water spray can be used to cool containers
Specific Hazards: Vapors may form explosive mixtures with air; combustion produces carbon oxides, nitrogen oxides
Protective Equipment: Wear full protective gear and self-contained breathing apparatus (SCBA)
Firefighting Instructions: Move containers from fire area if not dangerous; keep drums cool with water spray to prevent rupture
Spill Response: Evacuate area and ventilate; avoid breathing vapors
Personal Protection: Use gloves, goggles, lab coat, and respirator if needed
Containment: Absorb with inert material such as sand or vermiculite
Cleanup: Collect and place in suitable closed containers for disposal; wash spill site after removal
Environmental Precautions: Prevent entry to waterways, drains, or soil
Handling: Avoid prolonged or repeated contact; use only with adequate ventilation; avoid breathing dust or vapor
Storage Conditions: Store in tightly closed container, in a cool, dry place (recommended temperature: 2-8°C); keep away from ignition sources, oxidizers, and acids
Special Requirements: Ground/bond containers during transfer to prevent static accumulation; label all containers clearly
Occupational Exposure Limits: No established limits for 2-acetylpyrrole, recommend minimizing exposure
Engineering Controls: Use local exhaust ventilation or fume hood where possible
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene recommended), safety goggles, lab coat, respiratory protection if ventilation is inadequate
Hygiene Measures: Wash hands thoroughly after handling; do not eat, drink, or smoke during use; remove and wash contaminated clothes
Appearance: Pale yellow to light brown crystalline powder or solid
Odor: Characteristic sweet, bread-like odor
pH: Not applicable (solid compound)
Melting Point: 79-83°C
Boiling Point: 235-237°C
Flash Point: 111°C (closed cup)
Vapor Pressure: 0.02 mmHg @ 20°C
Solubility: Slightly soluble in water, freely soluble in ethanol and ether
Density: 1.10 g/cm3
Partition Coefficient (log Kow): 0.43
Viscosity: Not determined
Evaporation Rate: Not determined
Chemical Stability: Stable under normal ambient conditions and recommended storage conditions
Reactivity: May react with strong oxidizing agents or strong acids
Conditions to Avoid: Heat, open flame, sources of ignition, incompatibles
Hazardous Decomposition: Carbon monoxide, carbon dioxide, nitrogen oxides produced during combustion or thermal decomposition
Polymerization: Does not occur under normal handling
Acute Toxicity: Data limited; estimated LD50 (oral, rat) > 500 mg/kg
Skin Irritation: May cause skin irritation on prolonged or repeated contact
Eye Irritation: Causes moderate to severe irritation
Respiratory Effects: May cause coughing, irritation of mucous membranes
Target Organs: Respiratory tract, eyes, skin
Sensitization: Data not available; potential for allergic reaction considered low
Chronic Effects: No known carcinogenic, mutagenic, or reproductive hazards reported for this compound
Ecotoxicity: Very limited data available; predicted to have low acute toxicity to aquatic life due to low solubility
Persistence and Degradability: Expected to be biodegradable based on structure and functional groups
Bioaccumulation Potential: Log Kow indicates low potential for bioaccumulation
Mobility in Soil: Moderate mobility expected in soil; may leach, but low vapor pressure limits volatility
Other Adverse Effects: Avoid discharge to the environment; as with most pyrrole derivatives, risk for aquatic organisms increases with large spills
Waste Disposal Method: Dispose of product in accordance with local, regional, national, and international regulations
Contaminated Packaging: Containers must be triple rinsed before disposal or recycling; puncture and render unusable
Reference Waste Codes: Assign appropriate disposal codes as per local regulations (e.g. US EPA RCRA)
Special Precautions: Avoid discharge into drains or the environment; incinerate or use authorized chemical waste disposal facility
UN Number: Not regulated for ground or air transport under most systems
UN Proper Shipping Name: Not applicable
Transport Hazard Class: Not assigned
Packing Group: Not assigned
Environmental Hazards: Not considered marine pollutant
Special Transport Precautions: Prevent spillage and damage during transport
OSHA Status: Not listed as hazardous chemical under 29 CFR 1910.1200
TSCA Inventory: Listed
EINECS Number: 213-995-5
REACH: Not registered due to tonnage exemption; verify requirement for specific applications
California Proposition 65: Not listed
Other Regulations: Subject to reporting under SARA 311/312, category: Immediate (Acute) Health hazard
Labeling Requirements: Standard laboratory chemical labels suffice but include hazard pictograms as per GHS
