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Name: 4-Chloro-2-Nitrophenol
Chemical Formula: C6H4ClNO3
Appearance: Yellow crystalline solid
Synonyms: Para-chloronitrophenol, PCNP
Main Use: Intermediate in dyes, pharmaceuticals, and some pesticides, often surfacing in laboratories that focus on organic synthesis.
Primary Risks: Eye, skin, and respiratory irritant; toxic if swallowed or inhaled; potential environmental hazard due to toxicity in aquatic systems.
Target Organs: Liver, kidneys, and central nervous system.
Pictograms: Acute toxicity skull symbol, exclamation mark for skin/eye irritation.
Symptoms: Throat discomfort, headaches, nausea, skin redness, tearing eyes.
Chemical Identity: 4-Chloro-2-Nitrophenol
Chemical Purity: Typically above 98 percent for lab-grade material.
Inhalation: Remove to fresh air, monitor breathing, seek medical attention if symptoms worsen.
Skin Contact: Wash thoroughly with soap and water, discard contaminated clothing, get medical assessment for persistent irritation.
Eye Contact: Flush eyes with water for at least 15 minutes, hold eyelids open, consult an eye specialist.
Ingestion: Rinse mouth, avoid inducing vomiting, pursue urgent medical support.
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, foam, avoid direct water jet that can spread contamination.
Special Hazards: Releases toxic fumes of chlorine compounds, nitrogen oxides under fire; small fires handled from upwind position.
Protective Gear: Full protective gear including self-contained breathing apparatus.
Personal Precautions: Avoid inhaling dust or vapors, ventilate the area well, wear gloves, goggles, dust mask.
Spill Management: Sweep up without generating dust, place in sealed container, wipe remaining surface with wet material to avoid dust rise.
Environmental Response: Prevent entry into drains, ditches, or surface water.
Handling Points: Work in fume hood, avoid skin and eye contact, limit airborne particles by handling as a solid only in closed systems or ventilated spaces.
Storage Environment: Keep sealed in dry containers, away from heat and direct sunlight, separated from strong oxidizers and reducing agents.
Engineering Controls: Laboratory hoods, exhaust fans to capture dust and fumes.
Personal Protection: Gloves made from nitrile or neoprene, splash goggles, disposable lab coat.
Respiratory Protection: Dust mask or respirator for prolonged exposure or large-volume handling, eye wash station nearby.
Physical State: Solid at room temperature
Color: Yellow
Odor: Slight, often imperceptible
Boiling Point: Decomposes before boiling
Melting Point: Around 88–89°C
Solubility: Slightly soluble in water, more in alcohol and acetone
Vapor Pressure: Low under ambient conditions.
Stability: Stable under standard conditions, sensitive to prolonged exposure to sunlight and heat.
Reactivity: Reacts with reducing agents, strong bases, and oxidizers to form hazardous products.
Decomposition: Produces chlorine and nitrogen oxides on decomposition.
Routes of Exposure: Inhalation, ingestion, skin or eye contact.
Acute Effects: Causes irritation, headaches, dizziness.
Chronic Effects: Long-term exposure can impact kidney and liver function, and repeated exposure may sensitize skin.
Carcinogenicity: No clear classification, but always prudent to minimize exposure.
Aquatic Toxicity: Harmful to aquatic life, persistence can disrupt fish and invertebrate populations.
Bioaccumulation: Moderate potential, can concentrate in sediment and aquatic organisms.
Fate: Breakdown in the environment is slow, runoff into waterways should be strictly prevented.
Disposal Method: Treat as hazardous waste, hand over to licensed chemical disposal service.
Domestic Disposal: Not suitable for trash or drains.
Container Handling: Rinse triple or fill with inert absorbent, dispose by incineration or as hazardous waste.
Classification: Handled as hazardous chemical cargo, regulated under many chemical transport agreements.
Packing: Sealed, leak-proof containers, labeled with chemical name and hazard symbols.
Precautions: Avoid direct contact, secure upright during movement to prevent spills.
Labeling Needs: Proper hazard and precautionary statements, transport labels as required under chemical safety rules.
Restrictions: Use may face additional local and international controls, environmental rules restrict improper disposal and bulk release.
Reporting Requirements: Facilities handling large quantities should register use and report accidental releases to authorities.
