Bromochloromethane
- Methylene chlorobromide
- Halon 1011
- CB
- CBM
Bromochloromethane | |
| |
| Formula | CH2BrCl |
| Structure | |
| Description | A clear colorless liquid with a sweet chloroform-like odor. |
| Uses | Fire-extinguishing fluid (its effectiveness per unit weight makes it suitable for use in aircraft and portable extinguishers), explosive suppression agent, and intermediate and solvent in the manufacture of pesticides and other products. |
| Registry Numbers and Inventories. | |
| CAS | 74-97-5 |
| EC (EINECS/ELINCS) | 200-826-3 |
| EC Risk Phrase | R 20 |
| EC Safety Phrase | S 23 24/25 |
| RTECS | PA5250000 |
| RTECS class | Drug; Mutagen |
| UN (DOT) | 1887 |
| Beilstein/Gmelin | 1730801 |
| Beilstein Reference | 4-01-00-00074 |
| Swiss Giftliste 1 | G-1396 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | CH2BrCl |
| Formula mass | 129.39 |
| Melting point, °C | -83 |
| Boiling point, °C | 68 - 69 |
| Vapor pressure, mmHg | 147 (25 C) |
| Vapor density (air=1) | 4.46 |
| Critical temperature | 284 |
| Critical pressure | 63.85 |
| Density | 1.9 g/cm3 (15 C) |
| Solubility in water | Slightly soluble |
| Viscosity | 0.670 mn.s/sq m (20 C) |
| Surface tension | 33.32 g/s2 (20 C) |
| Refractive index | 1.483 |
| Partition coefficient, pKow | 1.41 |
| Heat of vaporization | 30.0 kJ/mol |
| Hazards and Protection. | |
| Storage | Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light. |
| Handling | Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Store protected from light. Corrosive to some forms of plastics, rubbers, and coatings. |
| Protection | Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. |
| Respirators | A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. |
| Small spills/leaks | Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation. |
| Stability | Stable under normal temperatures and pressures. May discolor on exposure to light. Light sensitive. |
| Incompatibilities | Strong oxidizing agents, strong bases, magnesium, zinc, calcium, powdered aluminum. |
| Decomposition | Hydrogen chloride, phosgene, carbon monoxide, carbon dioxide, hydrogen bromide. |
| Fire. | ||||
| Flash Point,°C | -23 | |||
| Upper exp. limit, % | 22.6 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. Material will not burn. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Water may be ineffective. Material is lighter than water and a fire may be spread by the use of water. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. | |||
| Fire potential | May burn but does not ignite readily. | |||
| Hazards | Most vapors are heavier than air. Air/vapor mixtures may explode when ignited. Container may explode in heat of fire. | |||
| Combustion products | Decomposition products (hydrogen chloride, hydrogen bromide and bromine gases) are evolved by contact with fire. | |||
| NFPA | Health | 1 | ||
| Flammability | 1 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | TLV: 200 ppm; 1060 mg/m3 (ACGIH 1994-1995). OSHA PEL: TWA 200 ppm (1050 mg/m3) NIOSH REL: TWA 200 ppm (1050 mg/m3) NIOSH IDLH: 2000 ppm |
| Poison_Class | 4 |
| Exposure effects | May cause liver and kidney damage. Prolonged exposure may produce a narcotic effect. Laboratory experiments have resulted in mutagenic effects. |
| Ingestion | Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver and kidney damage. May cause central nervous system depression. |
| Inhalation | Causes respiratory tract irritation. May cause chemical bronchitis with coughing and difficulty in breathing. Vapors may cause dizziness or suffocation. |
| Skin | Causes skin irritation. May cause dermatitis. |
| Eyes | Causes eye irritation. May cause eye injury. |
First aid |
|
| Ingestion | If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid. |
| Inhalation | Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. |
| Skin | Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. |
| Eyes | Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid. |
| Transport. | ||
| UN number | 1887 | |
| Response guide | 160 | |
| Hazard class | 6.1 | |
| Packing Group | III | |
| USCG CHRIS Code | BCM | |
| USCG Compatatibility Group | 36 Halogenated hydrocarbons | |
| Std. Transport # | 4925178 | |
| IMO Chemical Code | 17 | |
| IMO Pollution Category | D | |
| IMO Hazard code | S | |