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Chemical Name: 3-Chlorophenyl Isocyanate Chemical Formula: C7H4ClNO CAS Number: 2909-36-9 Appearance: White to light yellow crystalline solid Odor: Sharp, pungent, reminiscent of isocyanates Common Uses: Involved as an intermediate in synthesizing pharmaceuticals, agricultural products, specialty chemicals
Acute Hazards: Eye, skin, and respiratory tract irritation occurs quickly upon contact; sneezing, coughing, redness, and pain often follow exposure Chronic Effects: Long-term contact can cause additional sensitization, worsening respiratory troubles, and possible asthma development Carcinogenicity: Not considered a known human carcinogen, yet respiratory and skin sensitization mark major concerns Pictogram: Skull and crossbones, exclamation mark, corrosive symbol repeatedly appear on container labels for a reason
Main Ingredient: 3-Chlorophenyl Isocyanate (greater than 98% by weight) Known Impurities: Trace amounts of related chlorinated phenyl compounds, residual solvents sometimes lingering from manufacturing
Eye Contact: Rinse gently with water for at least 15 minutes, lifting eyelids now and then; remove contact lenses only after extensive washing begins, then keep flushing Skin Contact: Wash area with soap and a large volume of water for at least 15 minutes; remove contaminated clothing, get rid of tightly-fitting accessories Inhalation: Get into fresh air promptly, loosen clothing, monitor for breathing difficulties, never ignore shortness of breath and get professional help Ingestion: Rinse mouth, give water if the person is awake and alert, never force vomiting unless directed by a health professional, and seek immediate help
Suitable Extinguishing Media: Dry chemical, carbon dioxide, or alcohol-resistant foam offer best results; never try to douse burning isocyanates with water streams since violent reactions could result Hazardous Combustion Products: Burning may release phosgene, hydrochloric acid gas, nitrogen oxides, and other toxic gases; only fire crews equipped with self-contained breathing protection should approach Advice for Firefighters: Full gear makes all the difference, continuously cool containers with a gentle water spray from a safe distance
Personal Precautions: Keep unprotected individuals away, ventilate the space, only trained personnel with proper safety gear should enter Spill Cleanup: Dampen spilled material with inert absorbents like sand, vermiculite, or earth, collect into chemical waste containers, and seal tightly Preventing Environmental Contamination: Block off floor drains, avoid product from entering streams, rivers, or soil, always inform authorities if a large spill escapes into the environment
Safe Handling: Work inside chemical fume hoods, minimize aerosol generation by keeping processes gentle, never eat or drink where chemical use occurs, and wash hands frequently Storage: Store in a cool, dry, well-ventilated area, keep container tightly closed and separate from food, acids, alcohols, and moisture sources to prevent hazardous reactions Container Compatibility: Use glass or HDPE containers, metal can spark corrosion; never store in reactive or untested plastic
Engineering Controls: Local exhaust ventilation, sealed systems, and regular inspections of fume hoods keep vapor or dust levels low Personal Protective Equipment: Nitrile gloves, chemical splash goggles, lab coats, and, in high-risk environments, a face shield and full respiratory protection Workplace Hygiene: Shower and eye wash stations must be placed close to any work involving this chemical; regular hand washing reduces risk of skin absorption Exposure Limits: Strict occupational limits for isocyanates often apply; consult national workplace safety regulations for current threshold values
Physical State: Solid at room temperature, may appear as a powder or crystals Melting Point: Typically in the range of 55–57 °C Boiling Point: Estimates and literature place it near 220 °C Solubility: Reacts strongly with water; soluble in many organic solvents such as acetone, ether, benzene Vapor Pressure: Low at room temperature, though inhalation risk grows rapidly as temperature increases Odor: Sharp, potent, quickly irritates mucous membranes
Chemical Stability: Stable in dry, cool storage, unstable on prolonged exposure to air or moisture Reactivity: Reacts violently with water, acids, bases, alcohols; generates heat and toxic gases under those circumstances Hazardous Reactions: Contact with strong oxidizers or amines may cause rapid, uncontrolled reactions Decomposition Products: Releases hydrogen chloride, phosgene, and nitrogen oxides at elevated temperatures or upon combustion
Acute Toxicity: Short exposures have caused significant irritation and pulmonary symptoms, laboratory animal studies confirm harmful effects via skin, eye, and inhalation exposure Chronic Toxicity: Prolonged low-level exposure brings on cough, chest tightness, risk of developing asthma even in those with no history of allergies Route Specific Symptoms: Inhaling dust or vapor can cause headaches, nausea, difficulty breathing, and burning sensations Sensitization: High risk of allergic reactions after repeated contact, both on skin and in lungs
Toxicity to Aquatic Life: Laboratory data indicate high toxicity in fish and aquatic invertebrates, with rapid effects following spills Persistence and Degradability: Not readily biodegradable, tends to linger in the environment, especially in water or soil receiving repeated contamination Bioaccumulation: Evidence suggests possible accumulation in certain aquatic organisms over time Mobility in Soil: Limited mobility under dry conditions, but increased risk during wet weather when solubility and reactivity increase
Waste Treatment: Incinerate at approved, high-temperature chemical waste facilities; avoid landfills and standard drains Container Handling: Triple-rinse empty containers with appropriate neutralizing solutions, puncture, then deliver to a licensed hazardous waste collector Regulatory Restrictions: Strict guidelines exist for transport or disposal; always reference local and national environmental protection standards
Classification: Recognized as a hazardous material under most chemical shipping laws, falls under Class 6.1 (toxic substances) Labeling: Requires ‘Toxic’ and ‘Corrosive’ hazard diamond stickers on all shipping packages Packing Group: Typically Group II, reflecting serious risk if packaging fails Transport Conditions: Ship in leak-proof, corrosion-resistant containers, separate from food and animal feed at all stages
Workplace Safety: Subject to occupational exposure limit regulations in numerous countries targeting isocyanates for tight workplace controls Environmental Laws: Product listings remain strict under hazardous air pollutant guidelines; Notification is mandatory if large spills threaten water supplies or public health Right-To-Know: Appears on chemical right-to-know lists; handled under worker safety disclosure and reporting requirements Use Restrictions: Some regions place controls on large-scale agricultural or industrial use, particularly near water sources or residential zones
