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Chemical Name: 4-Ethylpyridine
CAS Number: 536-78-7
Synonyms: 4-Ethyl-pyridine, 1-Ethyl-4-pyridine
Recommended Use: Laboratory chemical, synthesis intermediate
Supplier Information: Manufacturer and supplier details to be provided by purchasing department or on packaging label
Emergency Telephone Number: Access local emergency services for chemical exposure incidents
GHS Classification: Flammable liquids (Category 3), Acute toxicity (Category 4, oral), Acute toxicity (Category 4, dermal)
Label Elements: Signal word: Warning
Hazard Statements: Combustible liquid, harmful if swallowed or in contact with skin, causes serious eye irritation
Pictograms: Flame, Exclamation mark
Precautionary Statements: Avoid breathing dust, fumes, gas, or vapors, wash exposed skin thoroughly after handling, wear protective gloves and eye protection, keep away from sources of ignition
Chemical Formula: C7H9N
Ingredient Name: 4-Ethylpyridine
Concentration: ≥98% by weight
Impurities: Trace organic solvents and pyridine derivatives under 1%
Inhalation: Move person to fresh air, watch for difficulty breathing, get medical attention if symptoms appear
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, seek medical advice if irritation persists
Eye Contact: Rinse eyes with plenty of water for at least fifteen minutes, lift eyelids to flush completely, get immediate medical help if irritation continues
Ingestion: Rinse mouth with water, do not induce vomiting, never give anything by mouth to an unconscious person, seek immediate medical care
Symptoms: Signs can include headache, dizziness, skin redness, eye irritation, upset stomach
Extinguishing Media: Use alcohol-resistant foam, dry powder, carbon dioxide, water spray
Special Hazards: Fumes may contain nitrogen oxides and carbon monoxide, containers can explode if heated
Protective Equipment: Firefighters need self-contained breathing apparatus and full protective clothing
Additional Information: Cool unopened containers with water spray to prevent rupture, collect contaminated fire water for disposal
Personal Precautions: Use proper ventilation, wear chemical-resistant gloves, goggles, and protective clothing
Environmental Precautions: Prevent entry to drains and surface waters, notify authorities if large quantities enter environment
Spill Clean Up Methods: Absorb with sand or vermiculite, scoop into labeled chemical waste containers, ventilate area, clean floor with water and detergent after material removal
Handling: Avoid direct contact with skin and eyes, work in a well-ventilated space, keep sources of ignition away, use explosion-proof equipment
Storage: Store in tightly closed containers, keep in cool, dry, well-ventilated area, protect from sunlight and incompatible materials such as oxidizers and acids
Exposure Limits: No specific occupational exposure limits established; use general organic vapor precautions
Engineering Controls: Provide local exhaust or general ventilation to keep vapor concentrations low
Personal Protective Equipment: Chemical-resistant gloves (nitrile), splash goggles, laboratory coat, flame-resistant clothing for bulk handling, use of NIOSH-approved respirator if vapor levels rise above safe limits
Appearance: Colorless to pale yellow liquid
Odor: Strong, pungent, characteristic aromatic amine odor
Molecular weight: 107.15 g/mol
Melting Point: -26°C
Boiling Point: 144–147°C at atmospheric pressure
Flash Point: 38°C (closed cup)
Solubility: Miscible with water, ethanol, ether
Vapor Pressure: Notable volatility at room temperature
Density: 0.95 g/cm³ at 20°C
pH: Slightly basic (aqueous solution)
Chemical Stability: Remains stable under normal working and storage conditions
Conditions to Avoid: Prolonged exposure to heat, ignition sources, strong light
Materials to Avoid: Strong oxidizing agents, strong acids, halogens
Hazardous Decomposition: Decomposes with heat to release toxic vapors like nitrogen oxides and carbon monoxide
Acute Toxicity: Harmful by oral and dermal exposure, potential LD50 (rat, oral) in the range of 200–2000 mg/kg
Skin Irritation: Causes noticeable irritation and redness
Eye Irritation: Can produce moderate to severe eye irritation
Chronic Effects: Repeated exposure may affect liver or kidneys
Other Effects: Overexposure may lead to headaches, dizziness, nausea, symptoms consistent with central nervous system depression
Sensitization: Not expected to cause allergic skin reactions
Aquatic Toxicity: Toxic to aquatic life, avoid release to surface waters, estimated LC50 (48h, fish) approximately 10–100 mg/L
Persistence: Potential for limited biodegradability, breaks down in sunlight over time
Bioaccumulation: Does not build up significantly in aquatic organisms
Mobility: Readily soluble in water, mobile in soil and water environments
Other Adverse Effects: Spills have potential to contaminate groundwater and harm aquatic environments
Disposal Methods: Incinerate in an approved facility or send to licensed chemical disposal company
Contaminated Packaging: Rinse thoroughly, dispose as hazardous chemical waste
Environmental Precautions: Do not dump into sewers, surface water, or on soil
Regulatory Requirements: Follow local, regional, and national regulations for hazardous waste management
UN Number: UN 1993
Proper Shipping Name: Flammable liquid, n.o.s. (4-Ethylpyridine)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Special Precautions: Secure container upright, keep away from heat and direct sunlight, notify carrier of hazardous nature, comply with applicable transport regulations by air, sea, and road
US Regulations: Listed under TSCA Inventory; EPA hazardous air pollutants reporting may apply
EU Regulation: Requires labeling under CLP Regulation (EC) No 1272/2008; SDS provided according to REACH Article 31
Other Regulations: Subject to SARA Title III reporting, Canadian WHMIS requirements; review all relevant national, state, and local legislation for worksite compliance
