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Product Name: Liquid Mixture of Bromomethane and Dibromoethane
Synonyms: Methyl bromide and Ethylene dibromide blend
Recommended Use: Fumigant, chemical intermediate, laboratory reagent
Supplier: Refer to your distributor or manufacturer
Emergency Contact: Local or regional emergency services, poison control centers
CAS Numbers: Bromomethane: 74-83-9; Dibromoethane: 106-93-4
Hazard Classification: Acute toxicity (oral, dermal, inhalation), suspected carcinogen, reproductive toxicity, specific target organ toxicity
Signal Word: Danger
Hazard Statements: Fatal if inhaled, toxic if swallowed or exposed to skin, may cause cancer, damages fertility or unborn child, causes organ damage through repeated exposure, very toxic to aquatic life
Pictograms: Skull and crossbones, health hazard, environment
Precautionary Statements: Avoid breathing vapors, use personal protective equipment, wash thoroughly after handling, keep container tightly closed, store locked up
Bromomethane: 40–60%
Dibromoethane: 40–60%
Impurities: Trace amounts of hydrobromic acid and other halogenated byproducts
Inhalation: Move to fresh air without delay, keep at rest, monitor for symptoms like coughing, headache, dizziness, respiratory distress; seek medical attention immediately if breathing difficulties occur
Skin Contact: Remove contaminated clothing, rinse skin with water for at least fifteen minutes, wash thoroughly with soap, call physician if irritation or symptoms develop
Eye Contact: Rinse eyes with plenty of water for fifteen minutes while lifting eyelids, do not let victim rub eyes, get medical care as soon as possible
Ingestion: Do not induce vomiting, rinse mouth thoroughly with water, never give anything by mouth to an unconscious person, seek urgent medical help
Symptoms of Exposure: Coughing, burning sensation, sore throat, dizziness, confusion, weakness, potential fatal respiratory or central nervous system depression
Suitable Extinguishing Media: Carbon dioxide, foam, dry chemical powder
Unsuitable Extinguishing Media: Direct water jets may spread liquid
Special Hazards: Thermal decomposition yields toxic gases including hydrogen bromide, halogenated compounds, risk of explosive mixture with air
Protective Equipment for Firefighters: Self-contained breathing apparatus, fully encapsulated suit, use extinguishing measures suited to surrounding materials
Fire Fighting Procedures: Remove containers from fire area if safe, cool with water mist to prevent decomposition, avoid direct contact with substance or runoff
Personal Precautions: Evacuate area, ventilate enclosed space, restrict access, wear chemical-resistant gloves, protective clothing, goggles, respiratory protection
Environmental Precautions: Prevent discharge into drains, soil, or waterways, notify authorities if significant spill occurs
Cleanup Methods: Contain spill using non-combustible absorbent materials like sand or vermiculite, collect and place into approved containers, ventilate area after cleanup
Disposal: Dispose of contaminated absorbents as hazardous waste following local regulations
Handling: Avoid direct contact with mixture, use spark-proof tools and equipment in well-ventilated areas, minimize vapor generation and accumulation, never eat, drink, or smoke during handling
Storage: Store in tightly closed, corrosion-resistant containers, in a cool, dry, well-ventilated facility away from incompatible substances like strong oxidizers and acids, label all containers clearly, keep locked and out of children's reach, protect from sunlight, extreme temperatures, and moisture
Incompatibilities: Strong bases, aluminum, powdered metals, oxidizers
Occupational Exposure Limits: Bromomethane OSHA PEL: 20 ppm (parts per million); Dibromoethane OSHA PEL: 20 ppm, NIOSH REL: 0.045 ppm (carcinogen)
Engineering Controls: Local exhaust ventilation, process enclosure, fume hoods, explosion-proof equipment recommended for large-scale use
Personal Protective Equipment: Impermeable gloves (nitrile, neoprene), chemical splash goggles, full face shield, flame-resistant lab coat or apron, chemical-resistant footwear, approved respirator (full face or supplied air if airborne levels exceed limits)
Hygiene Measures: Wash hands before breaks and after work, remove contaminated clothing immediately, provide eyewash stations and safety showers nearby
Appearance: Clear to slightly yellow, volatile liquid
Odor: Sweet, sharp, chloroform-like
pH: Not applicable (non-aqueous)
Boiling Point: Bromomethane: 3.6°C; Dibromoethane: 131°C; mixture will vary depending on ratio
Flash Point: Bromomethane: -57°C (closed cup); Dibromoethane: 62°C (closed cup)
Vapor Pressure: Bromomethane: 1420 mmHg @ 20°C; Dibromoethane: 11 mmHg @ 25°C
Density: About 1.5–2.2 g/cm³ depending on the exact mixture
Solubility: Limited water solubility, miscible with organic solvents (ethanol, ether)
Partition Coefficient (log Pow): Bromomethane: 1.24; Dibromoethane: 1.96
Explosion Limits: Lower: 10%; Upper: data not available, dependent on mixture proportions
Decomposition Temperature: Above 200°C, yields toxic bromine compounds
Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: Reacts violently with strong bases, metals, oxidizers, releases toxic gases when decomposed thermally
Hazardous Decomposition Products: Bromine, hydrogen bromide, carbon monoxide, carbon dioxide
Conditions to Avoid: Heat, open flame, ignition sources, contact with incompatible materials, prolonged exposure to light or moisture
Routes of Exposure: Inhalation, skin absorption, ingestion, eye contact
Acute Toxicity: Highly toxic, LD50 (oral, rats): Bromomethane: ~214 mg/kg; Dibromoethane: ~140 mg/kg
Chronic Effects: Mutagenicity, carcinogenicity with repeated exposure, reproductive harm, kidney, liver, and central nervous system toxicity
Symptoms: Headache, nausea, vomiting, shortness of breath, tremors, loss of consciousness at high dosage, neurological impairment
Cancer Status: IARC: Group 2A (Dibromoethane - probable human carcinogen)
Sensitization: Skin and respiratory sensitizer, risk increases with repeated contact
Medical Conditions Aggravated by Exposure: Respiratory illnesses, kidney or liver disorders, neurological diseases
Aquatic Toxicity: Extremely toxic to aquatic organisms, short- and long-term adverse effects possible
Persistence and Degradability: Both chemicals are persistent under normal environmental conditions, slow degradation in soil and water
Bioaccumulative Potential: Moderate potential for bioaccumulation in aquatic organisms
Mobility in Soil: High volatility leads to atmospheric dispersion, some leaching to groundwater may occur
Other Harmful Effects: Ozone depletion (bromomethane), long-term ecosystem impacts
Waste Disposal Methods: Designate as hazardous waste, incinerate at approved chemical incinerator equipped for halogenated waste, do not landfill or discharge to sewers
Container Disposal: Triple rinse, perforate, and send to facility for hazardous waste management
Precautions: Ensure compliance with all relevant state, local, and federal regulations
UN Number: Bromomethane: UN 1062; Dibromoethane: UN 1605
Proper Shipping Name: Toxic liquid, organic, n.o.s. (bromomethane, dibromoethane)
Transport Hazard Class: 6.1 (Toxic)
Packing Group: I (high danger)
Special Precautions for Transport: Segregate from oxidizers, foodstuffs, and feed, use corrosion-resistant containers, ensure all local, national, and international transport regulations are followed
Marine Pollutant: Yes
OSHA: Hazardous chemical under Hazard Communication Standard (29 CFR 1910.1200)
EPA: Both ingredients subject to reporting under TSCA and CERCLA, bromomethane listed as Class I ozone-depleting substance
SARA 302/304/313: Both compounds listed as Extremely Hazardous Substances (EHS); reporting required for releases
California Proposition 65: Dibromoethane listed as chemical known to cause cancer
International Inventories: Listed in North America, EU, and other regional regulatory lists
Special Restrictions: Stricter controls for any use, handling, transport, and disposal due to severe health and environmental risks
