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Chemical Name: 6-Methylquinoline
Synonyms: Lepidine
Molecular Formula: C10H9N
Molecular Weight: 143.19 g/mol
Appearance: Light yellow crystalline powder
Odor: Distinct aromatic or amine-like smell
Common Uses: Research laboratories, intermediate in dye and pharmaceutical synthesis
GHS Classification: Acute toxicity (oral, dermal, inhalation), skin and eye irritant
Pictograms: Exclamation mark, health hazard
Signal Word: Warning
Potential Health Effects: Irritates eyes, skin, and respiratory tract; may cause nausea, vomiting, and headache upon ingestion or inhalation
Chronic Effects: Extended exposure may affect liver and kidney functions; repetitive skin contact could trigger allergic reactions in sensitive individuals
Flammability: Combustible at high temperatures, not likely to ignite under most ambient conditions
Main Component: 6-Methylquinoline (purity over 97%)
Impurities: Trace amounts of quinoline derivatives and unidentified organic residues, usually below 2%
Inhalation: Remove affected person to fresh air; monitor for symptoms such as coughing, shortness of breath, or dizziness; medical attention recommended for lingering effects
Skin Contact: Promptly wash with plenty of water and mild soap; remove contaminated clothing
Eye Contact: Rinse cautiously with water for 15 minutes or more, holding eyelids open; seek medical evaluation if irritation persists
Ingestion: Do not induce vomiting; rinse mouth with water if conscious; call a poison center if feeling ill
Suitable Extinguishing Media: Dry chemical, carbon dioxide, alcohol-resistant foam
Specific Hazards: Decomposes to toxic fumes including nitrogen oxides and carbon monoxide; may form hazardous aerosols if dispersed
Protective Equipment: Firefighters need self-contained breathing apparatus and chemical-resistant clothing
Advice for Responders: Avoid breathing combustion gases; cool containers exposed to flames with water spray
Personal Precautions: Ventilate area; avoid dust generation; wear gloves, protective goggles, and a lab coat
Environmental Precautions: Prevent material from seeping into surface water, wastewater, or soil
Cleanup Methods: Collect spilled material with inert absorbents like sand or vermiculite; keep waste in sealed containers for licensed disposal
Post-Cleanup: Wash area thoroughly to remove residue; avoid raising dust during cleanup
Handling: Use in well-ventilated environments or chemical fume hoods; minimize direct contact; keep containers tightly closed
Precautions: Store solutions in labeled, corrosion-resistant containers; keep away from heat, open flames, and oxidizing agents
Storage Conditions: Cool, dry place; avoid direct sunlight; segregate from incompatible substances such as acids, strong bases, and oxidizers
Engineering Controls: Laboratory fume hood or other local exhaust; eyewash stations and safety showers
Personal Protective Equipment: Nitrile or neoprene gloves, eye protection (goggles or face shield), and flame-retardant lab coats
Respiratory Protection: Approved respirators in case of insufficient ventilation or airborne dust
Hygiene: Wash hands and face before eating or drinking; keep contaminated clothing away from clean areas
Appearance: Yellow to pale tan crystalline solid
Boiling Point: Approximately 244°C
Melting Point: Range around 24-28°C
Solubility: Low in water, soluble in alcohol, ether, and most organic solvents
Vapor Pressure: Low at room temperature
Flash Point: Around 108°C (closed cup; variation depends on sample purity)
Odor: Pungent, aromatic
Chemical Stability: Stable under prescribed storage conditions
Reactivity: Reacts with strong acids, strong oxidizers
Hazardous Decomposition: Nitrogen oxides, carbon monoxide, and other potentially harmful volatile organics
Polymerization: Not known to polymerize spontaneously
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Effects: Headache, nausea, throat irritation, dizziness, signs of nervous system depression after substantial exposure
Skin Effects: Erythema, allergic rash possible after repeat contact
Long-term Exposure: Reports from animal studies on quinolines suggest possible risk of organ toxicity; relevance in humans remains uncertain without additional data
Carcinogenicity: Not classified as carcinogenic by IARC or other major bodies, though related quinoline structures have drawn toxicological scrutiny
Aquatic Toxicity: Harmful to aquatic life at elevated levels, due to toxicity in microorganisms and possible bioaccumulation
Persistence and Degradability: Not rapidly biodegradable; tends to linger in sediment and water with slow breakdown rates
Mobility in Soil: Moderate, given organic solvent solubility; may move through water or surface runoff under inappropriate disposal
Bioaccumulation Potential: Exists, especially for larger organisms with repeated exposure; breakdown in the environment is slow under anaerobic conditions
Waste Handling: Collect all waste material and contaminated items in heavy-duty chemical waste containers designated for organic substances
Disposal Methods: Burn in a chemical incinerator equipped for scrubbed off-gases; do not dispose in household drains or landfill
Regulatory Guidance: Follow local, regional, and national regulations concerning disposal of hazardous laboratory chemicals
Shipping Requirements: Ship as a hazardous chemical according to current ICAO/IATA, ADR, or US DOT guidelines
Packing Considerations: Use UN-specified containers; secure packaging to prevent leaks or spills during transit
Transport Hazards: Not classed as highly hazardous by road, but restrictions apply on international air or sea routes
Spill Response During Transit: Immediate area isolation, specialist cleanup crews
Labelling Laws: Chemical subject to classification and labeling under OSHA’s Hazard Communication Standard
Threshold Planning Quantities: Not listed for SARA Title III extremely hazardous substances; general chemical inventory requirements apply in most countries
Worker Protection: OSHA mandates hazard training and safe handling procedures for all employees engaged with laboratory use or industrial processing
Environmental Restrictions: National legislation may restrict large-scale environmental release of quinoline derivatives, with reporting obligations for spills or significant emissions
