Dichlorodifluoromethane
- Refrigerant 12
- Freon 12
- Halon 12
- Difluorodichloromethane
Dichlorodifluoromethane | |
| |
| Formula | CCl2F2 |
| Structure | |
| Description | A colorless gas with a faint ethereal odor. |
| Uses | Refrigerant, aerosol propellant. |
| Registry Numbers and Inventories. | |
| CAS | 75-71-8 |
| EC (EINECS/ELINCS) | 200-893-9 |
| RTECS | PA8200000 |
| RTECS class | Human Data |
| UN (DOT) | 1028 |
| Merck | 12,3114 |
| Beilstein/Gmelin | 1732393 |
| Beilstein Reference | 4-01-00-00040 |
| RCRA | U075 |
| EPA OPP | 14 |
| Swiss Giftliste 1 | G-1527 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | CCl2F2 |
| Formula mass | 120.91 |
| Melting point, °C | -157.8 |
| Boiling point, °C | -29.79 |
| Vapor pressure, mmHg | 4249 (20 C) |
| Vapor density (air=1) | 4.2 |
| Critical temperature | 111.8 |
| Critical pressure | 40.7 |
| Density | 1.4883 g/cm3 (-30 C) |
| Solubility in water | 0.028 g/100 mL |
| Viscosity | 0.262 cp (20 C) |
| Surface tension | 11.7 g/s2 (0 C) |
| Dipole moment | 0.51 D |
| Partition coefficient, pKow | 2.16 |
| Thermal expansion | 0.0035/K at 15 C |
| Heat of vaporization | 20.9 kJ/mol |
| Hazards and Protection. | |
| Storage | Store at room temperature. Venting: safety relief. |
| WHMIS | A |
| Handling | Containers of this material may be hazardous when emptied. Since emptied containers retain product residues (vapor, liquid, and/or solid), all hazard precautions given in the data sheet must be observed. |
| Protection | Wear appropriate protective gloves, clothing and goggles. |
| Respirators | Wear positive pressure self-contained breathing apparatus (SCBA). |
| Small spills/leaks | Attempt to stop leak if without undue personnel hazard. |
| Stability | Stable. |
| Incompatibilities | Avoid contact with chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc and magnesium. On contact with acids or acid there is the evolution of highly toxic |
| Decomposition | Carbonyl fluoride, hydrogen chloride, hydrogen fluoride phosgene. |
| Fire. | ||||
| Fire fighting | Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. | |||
| Fire potential | Nonflammable gas | |||
| Hazards | Vapors from liquefied gas are initially heavier than air and spread along ground. | |||
| Combustion products | Although nonflammable, dissociation products generated in a fire may be irritating or toxic. | |||
| NFPA | Health | 1 | ||
| Flammability | 0 | |||
| Reactivity | 1 | |||
| Health. | |
| Exposure limit(s) | OSHA PEL: TWA 1000 ppm (4950 mg/m3) NIOSH REL: TWA 1000 ppm (4950 mg/m3) NIOSH IDLH: 15,000 ppm |
| Poison_Class | 5 |
| Exposure effects | Headache, dizziness, and disorientation are common. Cerebral edema may be found on autopsy. Dichlorodifluoromethane was not teratogenic in rats and rabbits. <br>The reproductive effects of 1,1,1,2-tetrafluoroethane were studied in rats. No adverse effects on reproductive performance was noted or on the development, maturation or reproductive performance of up to two successive generations. |
| Ingestion | Nausea may develop. Ingestion of a small amount of trichlorofluoromethane resulted in necrosis and perforation of the stomach in one patient. |
| Inhalation | Vapors may cause dizziness or asphyxiation without warning. |
| Skin | Dermal contact may result in defatting, irritation or contact dermatitis. Severe frostbite has been reported as an effect of freon exposure. Injection causes transient pain, erythema and edema. |
| Eyes | See Skin. |
First aid |
|
| Ingestion | This compound is a gas, therefore inhalation is the first route of exposure. |
| Inhalation | IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used. |
| Skin | CAUTION: Exposure of skin to compressed gases may result in freezing of the skin. Treatment for frostbite may be necessary. Remove the victim from the source of contamination. IMMEDIATELY wash affected areas gently with COLD water (and soap, if necessary) while removing and isolating all contaminated clothing. Dry carefully with clean, soft towels. If symptoms such as inflammation or irritation develop, IMMEDIATELY call a physician or go to a hospital for treatment. |
| Eyes | First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. If symptoms (such as redness or irritation) develop, immediately transport the victim to a hospital. |
| Transport. | ||
| UN number | 1028 | |
| Response guide | 126 | |
| Hazard class | 2.2 | |
| USCG CHRIS Code | DCF | |
| USCG Compatatibility Group | 36 Halogenated hydrocarbons | |
| Std. Transport # | 4904532 | |
| IMO Gas Code | B | |