Product Name: 5,6-Dimethylbenzimidazole
Chemical Formula: C9H10N2
Synonyms: 5,6-Dimethyl-1H-benzimidazole, Dimethylbenzimidazole
CAS Number: 89-65-6
Intended Use: Intermediate in pharmaceutical and chemical synthesis
Manufacturer: Not specified
Supplier Contact: Emergency phone, address, and contact details as provided by supplier
GHS Classification: Eye Irritant (Category 2A), Skin Irritant (Category 2), Acute Toxicity Oral (Category 4)
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation, may cause respiratory irritation, harmful if swallowed
Pictograms: Exclamation mark
Precautionary Statements: Avoid breathing dust, wash hands thoroughly after handling, wear protective gloves and eye protection, use only in a well-ventilated area
Emergency Overview: Dust may create respiratory discomfort, exposure may aggravate pre-existing skin or respiratory conditions
Chemical Name: 5,6-Dimethylbenzimidazole
Synonyms: Dimethylbenzimidazole
CAS Number: 89-65-6
Concentration: >98% by weight
Impurities: No significant impurities considered to impact hazard classification
Inhalation: Move person to fresh air, assist breathing with oxygen if needed, consult physician for continued symptoms
Skin Contact: Remove contaminated clothing, rinse skin with soap and water for at least 15 minutes, call medical help for persistent irritation
Eye Contact: Rinse cautiously with water for several minutes, remove contacts if present and easy, continue rinsing, seek medical advice if irritation persists
Ingestion: Rinse mouth with water, do not induce vomiting, call medical support immediately for advice
Most Important Symptoms: Irritation of skin, eyes, respiratory tract, ingestion may result in nausea, headache, or abdominal pain
Suitable Extinguishing Media: Dry chemical, CO2, water spray, or foam
Special Hazards: Emits toxic fumes under fire conditions including nitrogen oxides and carbon oxides
Protective Equipment: Firefighters use self-contained breathing apparatus, full protective gear
Specific Procedures: Move containers from area if safe to do so, avoid inhalation of combustion products, use water to cool untouched containers
Explosion Data: Dust may form explosive mixtures in air under certain conditions
Personal Precautions: Avoid dust generation, ventilate area, use approved respirator for spill area clean up
Protective Equipment: Chemical-resistant gloves, safety glasses, lab coat
Emergency Procedures: Evacuate area for large spills, isolate hazard area
Clean-Up Methods: Sweep up gently, avoid creating dust, place in marked sealed containers for proper disposal, wash area thoroughly after pickup
Environmental Precautions: Prevent release into sewers, drains, waterways, report large releases to appropriate authorities
Safe Handling: Use in fume hood or with adequate ventilation, minimize dust, avoid contact with skin and eyes, no eating, drinking, or smoking around product
Hygiene Practices: Wash hands and exposed skin thoroughly after handling, launder contaminated clothing
Safe Storage: Store in tightly closed containers in a cool, dry, well-ventilated place, keep away from incompatible materials such as strong oxidizers or acids, label containers clearly
Incompatibilities: Strong oxidizing agents, strong acids, moisture may degrade stability
Engineering Controls: Local exhaust ventilation, use process enclosures or other engineering controls to maintain airborne levels below exposure limits
Personal Protective Equipment (PPE): Safety goggles compliant with EN166 or equivalent, chemically resistant gloves, lab coat or protective suit, dust mask or respirator (NIOSH approved) for dust
Exposure Limits: No OSHA, ACGIH, or NIOSH established limits, keep concentrations as low as possible
Environmental Exposure: Avoid release, use containment methods for dust or spills
Personal Hygiene: Remove contaminated clothing, avoid unintentional hand-face contact, maintain clean workspace
Appearance: Off-white to pale yellow crystalline powder
Odor: Not significantly pronounced
pH: Not applicable (insoluble in water)
Melting Point: 170–173°C
Boiling Point: Not determined (decomposes before boiling)
Flash Point: Not determined
Flammability: Dust may be flammable in air
Solubility: Slightly soluble in water, soluble in organic solvents like methanol, DMSO
Vapor Pressure: Negligible at room temperature
Density: Approximately 1.2 g/cm³
Partition Coefficient (log Kow): Not readily available
Decomposition Temperature: Above 180°C
Chemical Stability: Stable under normal conditions, avoid moisture
Reactivity: Not highly reactive, but incompatible with strong oxidizers and acids
Hazardous Reactions: Risk of hazardous decomposition with strong oxidizers or high temperatures
Conditions to Avoid: Humidity, open flames, temperatures exceeding decomposition point
Hazardous Decomposition Products: Nitrogen oxides, carbon monoxide, carbon dioxide, other irritating fumes
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Toxicity: Limited data, estimated LD50 (oral, rat) above 2000 mg/kg, may cause headache, nausea, gastrointestinal discomfort if ingested
Skin Corrosion/Irritation: Causes irritation, redness, prolonged contact increases effects
Serious Eye Damage/Irritation: Eye contact leads to pain, redness, potential conjunctival irritation
Respiratory Sensitization: Prolonged exposure to dust may trigger mild respiratory effects
Chronic Toxicity: No significant evidence of chronic toxicity, potential for dermatitis with repeated skin exposure
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA
Reproductive & Developmental Effects: No available animal or human data
Ecotoxicity: Limited available data, not considered acutely toxic to aquatic life at workplace concentrations
Persistence and Degradability: Not readily biodegradable, may persist in soil and water
Bioaccumulative Potential: No data available, low water solubility limits mobility
Mobility in Soil: Expected to have low mobility due to moderate hydrophobicity
Other Adverse Effects: Avoid release to environment, chronic large discharge may affect local ecosystems
Waste Disposal Methods: Dispose of contents in accordance with local, state, and federal regulations, treat as hazardous chemical waste
Contaminated Packaging: Clean before recycling or dispose as hazardous material, avoid reuse of containers
Recommendations: Do not release to sewers or surface water, consult licensed waste disposal contractors
EPA Waste Codes: Not classified under specific EPA waste codes
UN Number: Not assigned
Proper Shipping Name: Not regulated as dangerous good at standard concentrations
Transport Hazard Class: Not applicable
Packing Group: Not applicable
Environmental Hazards: Not classified as marine pollutant
Special Precautions for Users: Ensure packaging integrity, prevent dust emission during handling and transport, refer to relevant national and international transport regulations
TSCA Status: Listed on United States TSCA inventory
REACH Status: Registered or exempted under European REACH Regulation
SARA Title III: Not listed as reportable chemical
California Prop 65: No listed chemicals
Other Regulation: Subject to workplace hazard communication standards, consult local regulatory requirements for specific guidance
Labeling Requirements: GHS-compliant labeling recommended, clear hazard and precautionary statements
