Product Name: Diethylbenzene
Chemical Formula: C10H14
Synonyms: 1,2-Diethylbenzene, 1,3-Diethylbenzene, 1,4-Diethylbenzene, DEB
CAS Numbers: 135-01-3 (meta), 25340-17-4 (mixed isomers), 105-05-5 (para)
EC Number: 205-170-3
Recommended Use: Solvent, organic synthesis, laboratory reagent
Manufacturer/Supplier Contact: Refer to supplier's safety data
Emergency Telephone: National Poison Control Center or local emergency services
Hazard Classification: Flammable liquid (Category 3), Acute toxicity (Category 4, oral), Skin and eye irritant
GHS Label Elements: Flame, exclamation mark
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Harmful if swallowed. Causes skin and eye irritation. May cause drowsiness or dizziness.
Precautionary Statements: Keep away from open flame, hot surfaces. Wear protective gloves and eye protection. Use only outdoors or in a well-ventilated area.
Potential Health Effects: Irritation to skin, eyes, and respiratory tract. May affect central nervous system leading to headaches or dizziness. Prolonged or repeated contact may defat skin.
Environmental Hazards: Harmful to aquatic life with long-lasting effects. Avoid release to environment.
Chemical Name: Diethylbenzene
Concentration: 98-100%
CAS Numbers: 135-01-3, 25340-17-4, 105-05-5
Impurities: May include traces of ethylbenzene, triethylbenzene
Other Components: Contains no other hazardous ingredients as defined by OSHA.
Inhalation: Move affected person outdoors to fresh air, lie in semi-upright position, keep warm and at rest. Seek immediate medical attention if breathing difficulties occur.
Skin Contact: Remove contaminated clothes and wash skin thoroughly with soap and water. If irritation persists, consult a physician.
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, holding eyelids apart. Remove contact lenses if present and easy to do. Obtain medical attention if symptoms develop.
Ingestion: Do not induce vomiting. Rinse mouth with water. Never give anything by mouth to an unconscious person. Seek medical attention without delay.
Notes for Physicians: Treat symptomatically. Monitor for respiratory depression and central nervous system effects.
Suitable Extinguishing Media: Use alcohol-resistant foam, dry chemical powder, or carbon dioxide. Water spray can cool fire-exposed containers.
Unsuitable Media: Do not use water jet directly on burning liquid as it may spread the fire.
Specific Hazards: Vapor may travel to ignition source and flash back. Sealed containers may explode when heated.
Hazardous Combustion Products: Carbon oxides, irritant fumes
Special Protective Equipment: Firefighters require self-contained breathing apparatus and full protective gear.
Additional Information: Avoid breathing smoke. Cool closed containers with water spray to prevent pressure build-up.
Personal Precautions: Do not breathe vapors. Avoid contact with skin and eyes. Evacuate non-essential personnel.
Protective Equipment: Wear suitable gloves, goggles, chemical-resistant clothing, and positive pressure respirator in case of inadequate ventilation.
Environmental Precautions: Prevent entry into sewers, watercourses, soil, and confined areas. Inform appropriate authorities if product has caused pollution.
Methods for Containment: Stop leak if possible without risk. Contain with inert absorbent such as sand or earth.
Clean-Up Procedure: Use non-sparking tools to transfer spilled material to a suitable, labeled container for disposal. Ventilate affected area.
Decontamination: Wash spill area with plenty of soap and water after material removal.
Safe Handling: Avoid breathing vapor. Do not eat, drink, or smoke during use. Ground and bond containers during transfer.
Avoidance: Keep product away from heat, sparks, static discharge, and open flames.
Storage Conditions: Store tightly closed in a cool, dry, well-ventilated location, away from incompatible materials such as oxidizers and strong acids.
Storage Stability: Keep container upright and tightly closed when not in use.
Packaging Materials: Keep only in original container or compatible chemical container with tight-fitting lids.
Other Instructions: Segregate from oxidants, store in properly labeled containers.
Occupational Exposure Limits: OSHA PEL: Not established; ACGIH TLV: Not established for compound—use as per general hydrocarbon exposures
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits.
Personal Protective Equipment:
Respiratory: Use a properly fitted NIOSH-approved respirator if ventilation is inadequate.
Skin: Wear chemical-resistant gloves such as nitrile or neoprene.
Eye: Use splash-proof safety goggles.
Clothing: Wear impervious protective clothing as needed.
Hygiene Measures: Wash hands after handling and before eating or drinking. Do not wear contaminated clothing.
Appearance: Clear, colorless liquid
Odor: Aromatic, sweet odor
Odor Threshold: No data available
pH: Not applicable
Melting Point/Freezing Point: -9°C to -25°C (varies by isomer)
Boiling Point and Range: 180°C to 183°C
Flash Point: 62°C (closed cup, varies by isomer)
Evaporation Rate: Not determined
Flammability: Flammable liquid
Upper/Lower Flammability Limits: 0.8% to 6% (by volume in air)
Vapor Pressure: 1.2 mmHg (20°C)
Vapor Density: 4.7 (air = 1)
Relative Density: 0.86 (water = 1)
Solubility: Insoluble in water; soluble in organic solvents
Partition Coefficient (Log Kow): 4.0–4.2
Autoignition Temperature: 482°C
Decomposition Temperature: Not determined
Viscosity: Not significant
Chemical Stability: Stable under recommended storage and handling conditions.
Possibility of Hazardous Reactions: Not likely unless exposed to strong oxidizing agents.
Conditions to Avoid: Heat, open flames, sparks, static discharge, strong acids, and oxidizing agents.
Incompatible Materials: Halogens, nitrates, peroxides, sulfuric acid.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, possibly irritating organic vapors.
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Toxicity: LD50 (oral, rat): approximately 2000 mg/kg
Skin Corrosion/Irritation: May cause moderate skin irritation on contact, especially with prolonged exposure.
Eye Damage/Irritation: Causes irritation; redness and watering of eyes possible.
Respiratory or Skin Sensitization: Not classified but repeated contact can produce allergic response in sensitive persons.
Repeated Dose Toxicity: Chronic or repeated exposure may cause damage to liver and central nervous system.
Carcinogenicity: Diethylbenzene not listed as a carcinogen by NTP, IARC, or OSHA.
Mutagenicity & Reproductive Toxicity: Not classified; insufficient data.
Other Hazards: Headache, dizziness, drowsiness, nausea from overexposure.
Ecotoxicity: Harmful to aquatic organisms; long-term exposure may adversely affect aquatic environments.
Persistence and Degradability: Readily biodegradable in soil and aquatic conditions but may persist in sediment.
Bioaccumulative Potential: High log Kow indicates potential for bioaccumulation in aquatic organisms.
Mobility in Soil: Moderate mobility; may leach into groundwater depending on soil conditions.
Other Adverse Effects: Avoid release to the environment. Prevent concentrated spills from entering drains or waterways.
Methods of Disposal: Use licensed chemical waste disposal contractor. Burn in a chemical incinerator equipped with afterburner and scrubber, if permitted by local regulations.
Waste Codes: U220 (Hazardous waste according to RCRA)
Contaminated Packaging: Dispose of as hazardous waste; containers must be drained completely and triple rinsed.
Precautions: Avoid contact with spent or used materials; wear proper protective equipment.
Special Instructions: Do not allow into sewers or public waters.
UN Number: UN1993
UN Proper Shipping Name: Flammable Liquid, N.O.S. (Diethylbenzene)
Transport Hazard Class: 3
Packing Group: III
Marine Pollutant: Yes
Special Transport Precautions: Store and transport upright, away from incompatible materials, in well-labeled hazardous material containers; keep away from heat and sources of ignition.
Regulatory Notes: Follow IMDG, IATA, and DOT regulations for safe and legal transport.
OSHA: Hazardous according to OSHA Hazard Communication Standard
SARA Title III: Listed as hazardous; Section 313 chemical
TSCA: Listed in the TSCA Inventory
California Proposition 65: Not listed
EPA: CERCLA: Not assigned a reportable quantity
Canada (WHMIS): Classified as B2 (flammable liquid), D2B (toxic material)
Other International Regulations: Subject to REACH and CLP regulations in the EU
Workplace Labelling: Proper chemical label including hazard pictograms and precautionary statements must be displayed on containers.
