Product Name: 2,5-Dichloro-1,4-Benzoquinone
Other Names: Chloranil, p-Benzoquinone, 2,5-Dichloroquinone
CAS Number: 118-75-2
Recommended Use: Laboratory research, chemical synthesis, organic reagent
Manufacturer Information: Supplier details appear on each product label, with emergency contact lines operational at all hours. Chemists, lab workers, and organizations handling this solid often reference a unique batch code for traceability.
GHS Classification: Acute Toxicity (Oral, Inhalation, Dermal): Category 3; Skin Corrosion/Irritation: Category 2; Eye Damage/Irritation: Category 2A; Specific Target Organ Toxicity (Single): Category 3
Signal Word: Danger
Hazard Statements: Toxic if swallowed, inhaled, or in contact with skin. Causes skin and eye irritation, may cause respiratory irritation.
Pictograms: Skull and Crossbones, Exclamation Mark
Precautionary Statements: Avoid breathing dust, wash thoroughly after handling, use personal protective equipment, keep container tightly closed, use only outdoors or in well-ventilated area.
Chemical Name: 2,5-Dichloro-1,4-Benzoquinone
Chemical Formula: C6Cl2O2
Molecular Weight: 177.98 g/mol
Concentration: 99% minimum (technical grade available in higher purity grades for analytical chemistry)
Impurities: Trace amounts of other chlorinated benzoquinones (usually below 1% as regulated for academic and industrial use)
Synonyms: Chloranil
Inhalation: Remove to fresh air immediately, seek medical attention if symptoms occur, rest patient in position comfortable for breathing.
Skin Contact: Take off contaminated clothing, rinse skin with plenty of water for at least 15 minutes, consult physician if irritation persists.
Eye Contact: Rinse eyes with water for several minutes, lift eyelids to remove possible residual particles, call physician for further instructions.
Ingestion: Rinse mouth, do not induce vomiting, seek urgent medical help.
Symptoms: Burning sensation, cough, sore throat, headache, dizziness; more severe effects in poor ventilation or prolonged exposure situations.
Suitable Extinguishing Media: Dry chemical, CO2, foam, water spray (small fires); avoid direct water jet on product.
Special Hazards Arising: Releases toxic and corrosive gases upon combustion, such as chlorine and hydrogen chloride fumes.
Advice for Firefighters: Wear full protective gear and positive pressure self-contained breathing apparatus; evacuate area; prevent run-off from reaching water bodies.
Flash Point: Not flammable under standard conditions, but will decompose under heat.
Explosion Data: No known explosive properties; dust explosion possible if finely divided.
Thermal Decomposition: Gives off irritating, corrosive fumes of HCl, CO, CO2.
Personal Precautions: Use gloves, goggles, dust masks or respirators; avoid direct contact and inhalation.
Environmental Precautions: Prevent entry into drains, underground water, soil; notify authorities in case of large spills.
Cleanup Methods: Collect spillage with inert, absorbent materials, sweep up and shovel into labeled waste container for disposal according to local regulation.
Ventilation: Increase air flow in cleanup area to reduce airborne concentration.
Decontamination: Wash contaminated surfaces with soapy water and rinse thoroughly.
Handling: Use in fume hood or well-ventilated setting, avoid long exposure, do not eat or drink during handling, keep away from incompatible materials such as strong reducing agents or alkalis.
Storage: Store in corrosion-resistant containers, in cool, dry, well-ventilated space away from direct sunlight and heat sources.
Packaging: Seal tightly, label containers with hazard data; segregate from food and drink.
Additional Controls: Use secondary containment in storage; periodic inspection for container integrity.
Control Parameters: OSHA PEL not established for this compound; ACGIH recommends minimizing exposure; keep airborne dust as low as possible.
Engineering Controls: Use fume hoods, local exhaust, lab air exchange systems.
Personal Protective Equipment: Safety glasses with side shields, chemical-resistant gloves (nitrile, neoprene), lab coat, NIOSH-certified respiratory protection where exposure exceeds limits.
Hygiene Measures: Wash hands, face, and forearms before eating or leaving lab area; change contaminated clothing.
Monitoring: Routine air quality testing in case of frequent or large-scale use.
Appearance: Yellow-green to brown crystalline powder
Odor: Sharp, acrid characteristic
pH (aqueous): Acidic, reacts with water to produce acidic solution
Boiling Point: Decomposes before boiling
Melting Point: 290°C (decomposes)
Solubility: Slightly soluble in water, soluble in ether, chloroform, acetone, and benzene
Vapor Pressure: Low at room temperature
Density: Approximately 1.56 g/cm3
Partition Coefficient (log P): 2.29
Other Properties: Dust forms readily and poses inhalation risk, volatile above 100°C with decomposition.
Chemical Stability: Stable in sealed containers at room temperature, reactive to bases and strong reducing agents.
Conditions to Avoid: Heat, light, moisture, acids, alkali, reducing agents.
Incompatible Materials: Strong bases, strong oxidizers, strong reducers, metals.
Hazardous Decomposition Products: Releases chloro-organics, hydrochloric acid, carbon oxides under fire.
Polymerization: Not known to occur.
Reactivity Notes: May react violently in presence of metals and heat, potentially forming dangerous byproducts.
Routes of Exposure: Inhalation, skin and eye contact, ingestion.
Acute Toxicity: LD50 (oral, rat): 235 mg/kg; LD50 (dermal, rabbit): >200 mg/kg; Inhalation can cause lung irritation.
Chronic Effects: Prolonged contact may cause sensitization; potential for liver or kidney impairment with repeated low-level exposure.
Symptoms: Irritation, headache, coughing, labored breathing; animal studies show acute and systemic effects, with risks in poorly ventilated workspaces.
Carcinogenicity: Not classified as human carcinogen (as per IARC, NTP, OSHA data by 2024); evidence insufficient in humans.
Other Data: Can be absorbed through skin; avoid all unnecessary exposure.
Aquatic Toxicity: Harmful to aquatic organisms, possible long-term effects in water environments.
Persistence and Degradability: Not readily biodegradable; resists breakdown.
Bioaccumulation Potential: Potential for bioaccumulation in aquatic species.
Mobility in Soil: Low mobility; binds strongly to organic soil matter.
Other Environmental Hazards: Large spills can pollute drinking water; restrictions in place near water sources in several countries.
Waste Treatment Methods: Dispose following federal, state, and local environmental regulations; avoid landfill if possible.
Contaminated Packaging: Handle as hazardous waste; containers require specialized processing.
Special Precautions: Never discharge into drains, soil, or surface water; recommend chemical incineration by certified facility.
Waste Code: Refer to local regulatory authority’s hazardous waste code.
Record-Keeping: Maintain log of waste handling—traceability for compliance.
UN Number: UN 3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (2,5-Dichloro-1,4-Benzoquinone)
Transport Hazard Class: 9
Packing Group: III
Marine Pollutant: Yes
Special Precautions: Keep separated from food, don’t ship with incompatible chemicals, use sealed and labeled containers.
Regulatory Notes: Requires correct SDS documentation for transit; custom declaration with proper hazard labelling for international shipping.
TSCA Inventory: Listed
REACH Status (EU): Registered or pre-registered substance, subject to safety compliance measures.
OSHA Hazard Category: Acute toxicity, skin/eye irritation, environmental hazard
SARA Title III Sections 302/313: Not specifically listed; must review trade and handling volume.
RCRA Status: Designated hazardous waste under U.S. regulations.
Other Regulations: Personal exposure and environmental release are tracked in many regional safety programs; recommended to check country-specific workplace and chemical handling codes for most updated details.
