Product Name: 4-Methyl-N-Hexylpyridinium Bromide
Chemical Family: Pyridinium salt
CAS Number: 144972-35-0
Synonyms: 1-Hexyl-4-methylpyridinium bromide
Recommended Use: Laboratory research, chemical synthesis, specialty manufacturing
Manufacturer: Contact supplier for current manufacturer’s details
Emergency Contacts: National Poison Center, local emergency response numbers
GHS Classification: Eye irritation (Category 2), Skin irritation (Category 2), Acute oral toxicity (Category 4), Hazardous to aquatic environment (Chronic Category 3)
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation. Harmful if swallowed. May cause respiratory irritation. Harmful to aquatic life with long lasting effects.
Pictograms: Exclamation mark, Environmental hazard
Precautionary Statements: Avoid breathing dust, wash hands thoroughly after handling, use in well-ventilated area, avoid release to the environment.
Chemical Identity: 4-Methyl-N-Hexylpyridinium Bromide
CAS Number: 144972-35-0
EC Number: Not available
Common impurities: Unreacted pyridine compounds, trace organic solvents
Concentration: Product typically provided as >98% pure substance
Inhalation: Move person to fresh air. If breathing difficulties develop, seek immediate medical attention.
Skin Contact: Remove contaminated clothing. Wash affected skin area with soap and water for at least 15 minutes. Seek medical advice if irritation develops.
Eye Contact: Flush eyes with water for at least 15 minutes, lifting eyelids occasionally. Remove contact lenses if present. Get medical attention if redness or pain persists.
Ingestion: Rinse mouth thoroughly with water. Do not induce vomiting unless directed by medical personnel. Get medical help if symptoms develop.
Most important symptoms: Respiratory tract irritation, skin redness, eye discomfort, possible stomach upset.
Suitable Extinguishing Media: Dry chemical, carbon dioxide, alcohol-resistant foam, or water spray
Unsuitable Extinguishing Media: Direct water stream if possible extensive contamination present
Specific Fire Hazards: Product may produce toxic fumes of carbon oxides, nitrogen oxides, hydrogen bromide during burning
Protective Equipment: Wear self-contained breathing apparatus and full protective gear.
Advice for Firefighters: Cool exposed containers with water spray to prevent rupture. Avoid inhalation of combustion gases.
Personal Precautions: Wear protective gloves, safety goggles, lab coat, and suitable respiratory protection.
Spill Response: Avoid creating dust. Ventilate area. Collect spilled material using chemical absorbent pads or inert material such as sand.
Clean-up Methods: Sweep up with care, transfer to sealed container for disposal. Clean spill site with water and detergent.
Environmental Precautions: Prevent entry to waterways, soil, and drains. Notify environmental authorities if large release threatens environment.
Additional Advice: Dispose of contaminated cleaning materials in accordance with regulations.
Handling: Use only in a well-ventilated area or fume hood. Avoid contact with skin, eyes, and clothing. Do not breathe dust.
Storage Conditions: Store in tightly closed containers. Keep away from strong oxidizers and sources of ignition. Store at room temperature in a dry, well-ventilated location, protected from light.
Incompatibilities: Avoid strong acids, strong bases, and oxidizing agents.
Hygiene Measures: Wash hands thoroughly after handling. Do not eat, drink, or smoke in work areas.
Engineering Controls: Use chemical fume hood, exhaust ventilation or other engineering controls to limit airborne exposure.
Respiratory Protection: NIOSH approved respirator if exposure limits are exceeded or symptoms are experienced.
Skin Protection: Wear chemical-resistant gloves and lab coat.
Eye Protection: Safety goggles or face shield against chemical splashes.
Work Practice Controls: Handle material using good laboratory practices. Keep eyewash station and safety shower accessible nearby.
Exposure Limits: No specific occupational exposure limits established. Use general guidance for laboratory chemicals.
Form: Solid, crystalline
Color: White to off-white
Odor: Slight, characteristic
Melting Point: 155–165°C
Boiling Point: Decomposes before boiling
Solubility: Very soluble in water and organic solvents (methanol, ethanol, acetone)
pH (solution): Approximately neutral in water
Vapor Pressure: Negligible at room temperature
Density: Not specifically determined, estimated between 1.1–1.3 g/cm³ at 20°C
Partition Coefficient: Log Kow not available
Other Properties: Hygroscopic properties may be present
Chemical Stability: Stable under recommended storage conditions.
Decomposition: May release toxic fumes of CO, CO₂, NOx, and HBr at high temperatures.
Conditions to Avoid: Heating above decomposition temperatures, prolonged exposure to moisture, direct sunlight.
Incompatibilities: Strong oxidizers, strong bases, strong acids.
Reactivity: Product remains stable under normal handling; no hazardous polymerization anticipated.
Corrosivity: Not considered corrosive to metals under normal laboratory conditions.
Acute Toxicity, Oral: May be harmful if swallowed; limited data available, estimated LD50 (rat) >300 mg/kg
Inhalation: May cause irritation of respiratory tract
Dermal: Skin contact produces irritation or rash in sensitive individuals
Eye Contact: Potential for redness, pain, or conjunctival irritation
Chronic Effects: No chronic toxicity data available; repeated exposure may cause dermatitis
Carcinogenicity: No classification, not listed by IARC, NTP, or OSHA
Mutagenicity: No relevant studies available
Signs of Overexposure: Headache, dizziness, skin erythema, stomach upset, cough
Ecotoxicity: Harmful to aquatic organisms. Higher concentrations could impact aquatic invertebrates and plant life; detailed data currently limited.
Persistence and Degradability: May not readily undergo natural biodegradation, possible environmental persistence.
Bioaccumulation Potential: No precise data on bioconcentration; structurally, some risk for moderate accumulation in aquatic species.
Mobility in Soil: High water solubility suggests potential for movement in ground and surface waters.
Other Environmental Information: Avoid uncontrolled discharge into surroundings.
Waste Handling: Treat as hazardous laboratory waste. Do not mix with household garbage.
Disposal Method: Send to authorized chemical disposal facility. Comply with local, regional, and national regulations.
Container Disposal: Triple rinse empty containers, deface labels, manage as hazardous waste.
Additional Guidance: Consult local environmental agencies concerning permits, chemical waste programs.
UN Number: Not assigned
Transport Hazard Class: Not regulated as dangerous goods in small laboratory quantities; check local regulations for bulk shipments.
Packing Group: Not applicable
Marine Pollutant: Product can harm aquatic environments; do not transport with incompatible substances.
Special Precautions: Avoid container damage and spillage during transport; keep containers tightly closed and labelled during transit.
US TSCA Status: Not listed on TSCA Inventory; for research use only
EU REACH Status: Not registered; research and development exemption may apply
Canadian DSL/NDSL: Not listed
SARA/Title III Status: Not classified as a hazardous substance
California Proposition 65: Not listed
Other National Regulations: Observe specific workplace chemical safety legislation and chemical registration protocols in country of use
Label Requirements: Clearly marked with standardized hazard and precautionary statements per GHS guidelines
