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Chemical Name: 3,4-Dichlorobenzyl Chloride
Common Synonyms: 1-(Chloromethyl)-3,4-dichlorobenzene
Molecular Formula: C7H5Cl3
Appearance: Pale yellow to colorless liquid with a pungent odor.
Uses: Often used as an intermediate in organic synthesis — people working in labs and factories can find it in the manufacturing lines for specialty chemicals or pharmaceutical compounds.
Hazard Classifications: Acute toxicity, Skin and eye irritation, Specific target organ toxicity.
Exposure Risks: Inhalation, skin and eye contact, accidental ingestion. Vapors or mists can enter the lungs and cause respiratory irritation or more severe health issues. Direct contact with the skin results in burning or rashes.
Chronic Hazards: Long-term or repeated exposure can damage the liver, kidneys, or nervous system. Once inhaled or absorbed through the skin, the chemical builds up and creates trouble in the body's vital systems.
Emergency Overview: Flammable liquid and vapor. Handling in confined spaces can cause dangerous atmosphere accumulation, leading to acute poisoning or fire risk.
Main Component: 3,4-Dichlorobenzyl Chloride, typically at concentrations above 98%.
Impurities: Trace organochlorine byproducts possible, materials left from synthesis but in minor quantities.
After Inhalation: Move the affected person to fresh air as quickly as possible. If breathing gets difficult, use oxygen. Immediate medical attention saves lives if the person loses consciousness or shows signs of distress.
After Skin Contact: Take off contaminated clothing and wash skin under running water for at least 15 minutes. Remove residue from the skin using soap. Seek medical care for persistent irritation, blistering, or chemical burns.
After Eye Contact: Rinse eyes cautiously with plenty of water for at least 15 minutes, lifting eyelids to get all chemical out. Medical help should be called even if you feel some relief at first.
After Ingestion: Rinse mouth, do not induce vomiting. Get medical attention immediately. Swallowing this compound may cause severe internal damage.
Suitable Extinguishing Media: Dry powder, carbon dioxide, alcohol-resistant foam. Water may not put out fires efficiently and can spread contamination.
Hazardous Combustion Products: Burning can produce hydrogen chloride and phosgene gases, both extremely dangerous to health.
Special Protective Equipment: Firefighters use self-contained breathing apparatus and protective gear, because smoke or residue causes chemical burns and inhalation injuries.
Fire & Explosion Hazards: Vapors form explosive mixtures with air at certain concentrations. Spills near ignition sources can lead quickly to flash fires.
Personal Precautions: Wear gloves, goggles, and appropriate PPE to avoid skin and eye contact. Do not breathe vapors.
Environmental Precautions: Keep spilled material out of drains and water bodies. Use sand, earth, or inert absorbent material to stop spread.
Cleanup Methods: Ventilate the affected area well, collect spilled liquid with absorbent, seal in clearly labeled containers, and dispose via hazardous waste protocols in accordance with regional laws.
Handling Recommendations: Use in well-ventilated areas, preferably fume hoods. Keep away from sparks, open flames, and sources of static discharge. Never eat, drink, or smoke where chemicals are handled.
Storage Conditions: Keep containers tightly closed, in cool, dry, well-ventilated storage rooms. Separate from incompatible materials such as strong oxidizers or bases. Clearly label all storage vessels.
Transport Considerations: Transport in sealed, upright containers designed to avoid leakage and breakage.
Occupational Exposure Limits: No established limits in many regions, but limits follow local regulations or chemical handling guidelines.
Engineering Controls: Fume hoods, exhaust systems, and negative-pressure rooms reduce airborne exposure.
Personal Protective Equipment: Chemical-resistant gloves, tightly fitted goggles, impervious protective clothing, and respiratory protection where vapors form.
Hygiene Suggestions: Always wash hands and face thoroughly before meals or after working with this chemical. Take steps to avoid contaminated clothing bringing material outside the workplace.
Physical State: Liquid at room temperature.
Color: Pale yellow or almost colorless.
Odor: Sharp, pungent aroma that irritates nose and eyes.
Boiling Point: Approximately 238°C.
Melting Point: Near -7°C.
Density: 1.38 g/cm³.
Solubility: Insoluble in water, soluble in organic solvents like ether or acetone.
Vapor Pressure: Low at room temperature, but vapor forms at higher temperatures.
Flash Point: Around 110°C (closed cup).
Chemical Stability: Stable under recommended storage and handling conditions.
Reactivity: Reacts with strong oxidizers, alkalis, and certain metals to produce heat and possible toxic gases.
Hazardous Decomposition: Releases corrosive hydrogen chloride and cancer-linked phosgene if burned or decomposed.
Incompatibilities: Strong oxidizing agents, bases, and some reducing materials.
Routes of Exposure: Inhalation, skin and eye contact, accidental ingestion.
Acute Effects: Coughing, difficulty breathing, burning sensation in lungs, severe skin or eye burns, stomach pain, and vomiting if swallowed.
Chronic Effects: Repeated exposure damages kidneys, liver, or nervous system. Workers with poor ventilation or defective personal protection suffer most.
Carcinogenicity and Mutagenicity: Not well studied, but chemical relatives raise cancer concerns, especially with improper long-term handling.
Aquatic Toxicity: Highly toxic to fish and aquatic organisms even at low concentrations.
Environmental Behavior: Persistent in soil and water, resists breakdown. Once spilled, the chemical lingers, threatening wildlife for months.
Bioaccumulation Potential: Can accumulate in animal fatty tissues, spreading slowly up the food chain.
Waste Treatment: Incinerate with specialized chemical incineration plants equipped with gas scrubbing systems.
Do Not Dispose: Never pour in drains, watercourses, or general waste streams. Traditional landfill or landfill-adjacent methods lead to environmental contamination.
Container Handling: Use clearly marked, sealed drums. Clean empty containers with rotating use of chemical-neutralizing cleaning agents, then dispose as hazardous waste.
UN Number: Classified as a hazardous material under several regulatory systems.
Class: Flammable Liquid; Toxic Substance
Packing Group: Group II or III — lower numbers mean greater danger.
Labels Required: Flammable liquid, Harmful/Irritant symbols must appear clearly on all packages.
Driver Precautions: Drivers handle accidents with spill kits, fire extinguishers, and emergency PPE kits.
Emergency Procedures: Emergency responders consider vapor control, rapid evacuation, and fire-fighting measures.
Workplace Limits: Regulated in many countries for production, handling, and disposal. Employers must provide appropriate safety information and equipment for staff.
Environmental Controls: Local authorities enforce strict reporting and cleanup guidelines to prevent pollution. Chemical listings under hazardous substances legislation compel companies to register and monitor usage.
Reporting: Spills or releases over set quantities reach local agencies by law, triggering prompt investigation and remediation.
Labeling Requirements: All shipments and containers need explicit hazard communication under globally harmonized systems.
