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Chemical Name: 2-Chloropyridine
Chemical Formula: C5H4ClN
Synonyms: alpha-Chloropyridine
Appearance: Colorless to pale yellow liquid with a noticeable, sharp odor.
Odor: Characteristic pungent, irritating.
Uses: Common as an intermediate in pharmaceuticals, agrochemicals, and dye manufacturing. Many labs and factories rely on it for specialty chemicals.
Classification: Flammable liquid, acute toxicity—oral, skin, inhalation, serious eye irritation.
Hazard Pictograms: Flame, Skull and Crossbones, Exclamation Mark.
Warning Statements: Causes irritation to skin, eyes, and respiratory system. Harmful if swallowed, inhaled, or absorbed through skin. Vapors may cause dizziness or drowsiness.
Possible Chronic Impact: Prolonged exposure can damage liver and kidneys. Research links repeated contact to nervous system effects.
Target Organs: Skin, eyes, respiratory tract, nervous system.
Environmental Risk: Poses significant risk to aquatic life if spilled or disposed carelessly.
Main Ingredient: 2-Chloropyridine (over 98% by volume)
Impurities: Trace amounts of other chlorinated pyridines and residual solvents from production methods. These minor constituents rarely exceed 2%.
CAS Number: 109-09-1
Formula Details: Contains both a chlorine atom and a heterocyclic nitrogen, raising reactivity concerns especially in mixture with acids or bases.
Inhalation: Fresh air as soon as possible, rest, seek immediate medical attention if breathing becomes difficult.
Skin Contact: Immediate flushing with water for at least 15 minutes, remove contaminated clothing, use soap, check for chemical burns.
Eye Contact: Rinse under running water for at least 15 minutes, hold eyelids open, medical evaluation advised.
Ingestion: Rinse mouth, seek immediate medical help, do not induce vomiting unless instructed.
Other Notes: People exposed often describe strong irritation, so fast action cannot be underestimated.
Extinguishing Agents: Use foam, dry chemical, carbon dioxide. Water spray can suppress vapors but may spread spill.
Hazardous Products of Combustion: Hydrogen chloride, nitrogen oxides, carbon monoxide.
Precautions: Wear full firefighting gear, use self-contained breathing apparatus. Explosive vapor-air mixtures may form.
Special Risks: Fire vapors heavier than air, collect in low areas, can flash back. Toxic gases produced at high temperatures. Nearby containers may rupture from heat.
Personal Protection: Avoid inhalation and skin contact, wear gloves, goggles, and suitable respirator.
Environmental Protection: Prevent chemical from reaching drains, sewers, or waterways. Contain spill using non-combustible absorbent like sand or vermiculite.
Cleanup Approach: Scoop up material, seal in labeled drums for safe disposal as hazardous waste. Ventilate area before and during cleanup.
Decontamination: Thorough washdown of area with soap and water, monitor air quality if indoors.
Community Impact: Emergency responders report headaches, nausea among those not wearing proper protective gear, so it makes sense for even lay workers to pay attention to airborne concentrations.
Safe Handling: Work in well-ventilated areas, avoid splashing, never eat or smoke where substance is handled.
Containers: Use airtight, corrosion-resistant drums or bottles. Label clearly and check for leaks.
Storage Requirements: Store in cool, dry, well-ventilated location away from heat sources, flame, direct sunlight, strong acids and bases.
Segregation: Incompatible with strong oxidizers, reducing agents.
Industry Practice: Separate from food-related storage at all costs to avoid contamination. Keep access restricted to trained staff.
Recommended Limits: Occupational guidelines suggest keeping airborne levels below 5 ppm where possible.
Engineering Controls: Fume hoods or proper local exhaust ventilation reduce inhalation risk.
Personal Protective Equipment: Gloves resistant to organic solvents, chemical splash goggles, lab coats. Respiratory protection advised if ventilation inadequate.
Hygiene Measures: Wash hands and face after handling. Street clothes and work clothes should not be mixed.
Monitoring: Regular air and surface sampling in high-use work areas make a measurable difference in worker safety.
State: Liquid
Color: Colorless to pale yellow
Odor: Pungent, harsh
Boiling Point: Near 192°C
Melting Point: −43°C
Flash Point: 78°C (closed cup)
Solubility: Limited in water, good in organic solvents
Vapor Density: Heavier than air
Other Properties: Volatile under ambient conditions, may build up static charge during handling.
Chemical Stability: Stable under recommended storage and handling conditions.
Incompatible Materials: Strong acids, strong bases, oxidizers, reducing agents.
Hazardous Decomposition: Decomposes to hydrogen chloride and nitrogen oxides at high temp.
Polymerization: Not likely under normal conditions.
Incidents: Old stock or improperly sealed containers may ooze, cause pressure buildup. Regular checks for corrosion or leaks make a difference.
Inhalation: Causes throat and lung irritation, headache, dizziness, nausea in cases where exposure exceeds safe concentrations.
Skin Contact: Absorbed through skin, leading to systemic toxicity, possible chemical burns.
Eye Contact: Immediate irritation, risk of lasting eye damage.
Ingestion: Abdominal pain, vomiting, risk of liver and kidney harm, even at moderate amounts.
Chronic Effects: Animal data show liver, kidney, and nervous system toxicity from repeated doses.
Known Incidents: Worker reports in industrial settings mention memory problems, fatigue after repeated exposure without adequate personal protection.
Environmental Fate: Persistent in soil and water, not easily biodegraded.
Toxicity to Aquatic Life: Lethal to fish and other water organisms at low concentrations.
Bioaccumulation: Low tendency to bioaccumulate but chronic low-level exposure impacts aquatic food chains.
Spill Risks: Contamination events sometimes reported downstream of chemical factories, leading to calls for tighter secondary containment.
Preferred Disposal: Incineration in approved facilities.
Limitations: Do not discharge into sewers, surface water, or ground water.
Container Management: Use puncture-resistant, labeled hazardous waste drums.
Community Approaches: Many localities run periodic chemical waste collection for small users who cannot access industrial incineration plants, helping reduce improper disposal in landfills or drains.
UN Number: Classified as hazardous for transportation.
Transport Mode: Road, rail, waterway, and air shipping permitted under strict regulation.
Packaging: Only sealed, tested, leak-proof containers permitted. Clearly marked with hazard labels.
Spill Response: Emergency response plans in place at major shipping firms due to history of incidents on loading docks and in transit.
Global Regulations: Listed in major regulatory schemes due to toxicity and environmental risks.
Workplace Compliance: Occupational safety standards in most countries demand exposure limits, containment, periodic training.
Environmental Law: Discharge regulated under clean water and hazardous waste rules.
Public Policy: Recent reviews suggest stronger penalties for unauthorized disposal, given documented damage to waterways and wildlife habitats after unreported spills.
