Product Name: Dibenzopyrrole
Chemical Name: Dibenzopyrrole
CAS Number: 253-40-5
Synonyms: Carbazole
Recommended Uses: Organic synthesis, dye manufacturing, electrical insulation
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Classification: Acute oral toxicity, skin irritation, eye irritation, environmental hazard (aquatic)
Label Elements: Skull and crossbones pictogram, exclamation mark pictogram
Signal Word: Danger
Hazard Statements: Harmful if swallowed, causes skin and eye irritation, toxic to aquatic life with long lasting effects
Precautionary Statements: Avoid breathing dust/fumes, use with ventilation, prevent contact with skin and eyes, wash hands thoroughly, keep away from food and drinks
Potential Health Effects: Inhalation may cause respiratory irritation, ingestion may lead to gastrointestinal distress, repeated exposure increases risk for organ toxicity
Routes of Exposure: Inhalation, skin, eyes, ingestion
Chemical Name: Dibenzopyrrole
Common Name: Carbazole
CAS Number: 253-40-5
Content: >98% pure
Impurities: Trace amounts of polycyclic aromatic hydrocarbons, residual solvents from synthesis below 0.5%
Other Components: None significant for hazard classification
General Advice: Remove source of exposure and seek medical attention if symptoms linger
Inhalation: Move to fresh air, keep patient comfortable, seek medical help for breathing difficulty
Skin Contact: Remove contaminated clothing, wash with soap and water for at least 15 minutes, do not use solvents to clean skin
Eye Contact: Rinse with plenty of water for at least 15 minutes, hold eyelids apart, get medical help quickly
Ingestion: Rinse mouth, do not induce vomiting, call a poison center or doctor immediately
Most Important Symptoms: Burning sensation, redness, coughing, nausea, can cause headaches or dizziness if inhaled in large quantities
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide
Not to Use: Avoid direct water jet as it may spread material
Hazardous Combustion Products: Produces toxic fumes including nitrogen oxides, carbon monoxide, carbon dioxide
Protective Equipment for Firefighters: Full face mask, self-contained breathing apparatus, chemical resistant clothing
Special Fire Procedures: Use water spray to cool fire-exposed containers, avoid inhaling smoke or fumes, keep upwind if outside
Personal Precautions: Ventilate area, wear suitable protective equipment (gloves, goggles, respirator), restrict access
Spill Cleanup: Sweep up without raising dust, avoid runoff to drains, collect in suitable container for disposal
Environmental Precautions: Prevent further leakage, keep out of surface water and sewers, report spills as necessary
Decontamination: Wash spill area with water and detergent after material removal, air out area
Disposal: Dispose of all cleanup material as hazardous waste in approved facility
Safe Handling: Avoid dust generation, use in a chemical fume hood or well-ventilated space, always use gloves and splash goggles
Hygiene Practices: Wash hands before breaks and after use, remove contaminated clothing before eating
Storage Conditions: Store away from heat and direct sunlight in a cool, dry space, keep containers tightly closed
Incompatible Materials: Strong acids, strong bases, oxidizing agents
Special Precautions: Keep away from ignition sources, label containers, limit access to authorized handlers
Occupational Exposure Limits: Not established by OSHA, advisable to keep levels as low as possible
Engineering Controls: Local exhaust ventilation, fume hood for bench work, closed transfer systems
Respiratory Protection: NIOSH approved respirator if dust or fumes become airborne
Skin Protection: Nitrile gloves, chemical-resistant lab coat, closed-toe shoes
Eye Protection: Chemical splash goggles, face shield if splash risks increase
Other Protection: Eyewash station and safety shower in close reach, educate workers on emergency procedures
Appearance: White or colorless crystalline powder
Odor: Similar to coal tar, faint aromatic smell
Odor Threshold: Not determined
pH: Not determined (not water soluble)
Melting Point: 246–250°C
Boiling Point: 355–380°C
Flash Point: 195°C (closed cup)
Evaporation Rate: Not available
Flammability: May burn above flash point
Vapor Pressure: Negligible at room temperature
Vapor Density: Not available
Relative Density: 1.25–1.3 g/cm³
Solubility: Slightly soluble in alcohol, benzene, insoluble in water
Partition Coefficient (n-octanol/water): 3.2 (estimated)
Auto-Ignition Temperature: 450°C
Decomposition Temperature: Not specified
Viscosity: Solid—does not apply
Stability: Stable under recommended storage conditions
Reactivity: Does not react violently with common substances
Hazardous Reactions: Risk of violent reaction with strong oxidizers, acids, alkalis
Hazardous Decomposition Products: Toxic gases such as nitrogen oxides, carbon oxides
Conditions to Avoid: Excess heat, moisture, open flames, incompatible substances
Polymerization: No hazardous polymerization expected under normal conditions
Acute Toxicity: Oral LD50 in rats 243 mg/kg, classified as moderately toxic
Skin Corrosion/Irritation: Causes skin irritation based on animal data
Serious Eye Damage/Irritation: Causes moderate eye irritation, redness, tearing
Respiratory Sensitization: May cause respiratory discomfort, coughing on inhalation of powder
Carcinogenicity: Classified by some agencies as possible carcinogen due to structural similarity to PAHs
Genotoxicity: Mutagenic in bacterial assay in some studies
Chronic Effects: Prolonged exposure could affect liver and nervous system
Symptoms: Gastrointestinal upset, skin burning, dizziness, headache
Aquatic Toxicity: Highly toxic to aquatic life, LC50 (Fish, 96hr): 0.031 mg/L
Persistence and Degradability: Not readily biodegradable, persists in sediment
Bioaccumulation: Strong tendency to bioaccumulate in aquatic organisms
Mobility in Soil: Limited mobility due to low water solubility, binds strongly to soil and sediments
Other Adverse Effects: Disrupts aquatic food chains, hazardous to birds and mammals via contaminated prey
Waste Disposal: Collect and place material in sealed, approved containers; incinerate at licensed facility only; never dump into drains, surface water, or natural environment
Container Disposal: Contaminated packaging must follow same procedure as product, deface label before recycling or disposal
Special Instructions: Consult local, state, and federal environmental and hazardous waste regulations for precise methods; contractor for hazardous waste may be required
UN Number: UN3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (contains dibenzopyrrole)
Transport Class: 9 (miscellaneous dangerous substances)
Packing Group: III
Marine Pollutant: Yes
Special Precautions: Protect from rough handling and moisture, keep separate from food supplies, carry emergency instructions in transport documentation
US TSCA: Listed
EU REACH: Subject to registration, SVHC status may apply due to toxicity
OSHA Hazard Category: Hazardous chemical
SARA 311/312: Acute health hazard, chronic health hazard
Labeling Requirements: Must display hazard pictograms and warning statements
Other Regulations: Subject to workplace exposure limits in some jurisdictions, reportable quantity for environmental release, export notification may apply
