F12B2
dibromodifluoromethane
CAS: 75-61-6
Molecular Formula: CBr2F2
F12B2 - Names and Identifiers
| Name | dibromodifluoromethane |
| Synonyms | dfbm F12B2 R 12B2 freon12b2 Halon-1202 Freon 12B2 Freon 12-B2 Difluorodibromomethane dibromodifluoromethane dibromodifluoro-methan Carbondibromidedifluoride Carbonbromidefluoride(CBr2F2) dibromodifluoromethane CBr2F2 |
| CAS | 75-61-6 |
| EINECS | 200-885-5 |
| InChI | InChI=1/CBr2F2/c2-1(3,4)5 |
F12B2 - Physico-chemical Properties
| Molecular Formula | CBr2F2 |
| Molar Mass | 209.82 |
| Density | 2.297 g/mL at 25 °C(lit.) |
| Melting Point | -141 °C |
| Boling Point | 24.5 °C |
| Flash Point | None |
| Water Solubility | Insoluble |
| Solubility | Soluble in acetone, alcohol, benzene, and ether (Weast, 1986) |
| Vapor Presure | 12.79 psi ( 20 °C) |
| Vapor Density | 7.24 (vs air) |
| Appearance | Colorless liquid or gas |
| Exposure Limit | NIOSH REL: TWA 100 ppm (860 mg/m3), IDLH 2,000 ppm; OSHA PEL:TWA 100 ppm. |
| BRN | 1732515 |
| Storage Condition | 2-8°C |
| Refractive Index | 1.398-1.402 |
| Physical and Chemical Properties |
Colourless, heavy liquid. Soluble in most organic solvents; insoluble in water. Non-flammable. Used as a fire-extinguishing agent, refrigerant and lubricant. Also known as R12B2. |
F12B2 - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R59 - Dangerous for the ozone layer |
| Safety Description | S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S59 - Refer to manufacturer / supplier for information on recovery / recycling. |
| UN IDs | 1941 |
| WGK Germany | 3 |
| RTECS | PA7525000 |
| HS Code | 29034700 |
| Hazard Note | Irritant |
| Hazard Class | 9 |
| Packing Group | III |
| Toxicity | A 15-min exposure to 6,400 and 8,000 ppm were fatal to rats and mice, respectively (Patnaik, 1992). |
F12B2 - Reference Information
| Henry's Law Constant | 1.72 x 10-2 atm?m3/mol at 26 °C (static headspace-GC, Saini et al., 2002) |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| category | hazardous gas |
| toxicity grade | low toxicity |
| Acute toxicity | inhalation-mouse LC50: 140000 mg/m3/1 h |
| flammability hazard characteristics | no combustion; Toxic fluoride and bromide gases generated in the fire scene; ozone-depleting substances |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | dry powder, foam, sand |
| Occupational Standard | TWA 860 mg/m3; Tel 1000 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-and health-threatening concentrations | 2,000 ppm |
Last Update：2024-04-09 20:49:11
