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| Dichlorodifluoromethane | CAS 75-71-8 | ||
| CCl2F2 | RTECS PA8200000 | ||
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Synonyms & Trade Names Difluorodichloromethane, Fluorocarbon 12, Freon® 12, Genetron® 12, Halon® 122, Propellant 12, Refrigerant 12 |
DOT ID & Guide 1028 126 |
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Exposure Limits |
NIOSH REL: TWA 1000 ppm (4950 mg/m3) | ||
| OSHA PEL: TWA 1000 ppm (4950 mg/m3) | |||
| IDLH 15,000 ppm See: 75718 | Conversion 1 ppm = 4.95 mg/m3 | ||
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Physical Description Colorless gas with an ether-like odor at extremely high concentrations. [Note: Shipped as a liquefied compressed gas.] |
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MW: 120.9 |
BP: -22°F |
FRZ: -252°F |
Sol(77°F): 0.03% |
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VP: 5.7 atm |
IP: 11.75 eV |
RGasD: 4.2 |
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Fl.P: NA |
UEL: NA |
LEL: NA |
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| Nonflammable Gas | |||
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Incompatibilities & Reactivities Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesium |
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Measurement Methods NIOSH 1018 See: NMAM or OSHA Methods |
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Personal Protection & Sanitation Skin: Frostbite Eyes: Frostbite Wash skin: No recommendation Remove: No recommendation Change: No recommendation Provide: Frostbite |
First Aid (See procedures) Eye: Frostbite Skin: Frostbite Breathing: Respiratory support |
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Important additional information about respirator selection Respirator Recommendations NIOSH/OSHA Up to 10,000 ppm: (APF = 10) Any supplied-air respirator Up to 15,000 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus |
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| Exposure Routes inhalation, skin and/or eye contact (liquid) | |
| Symptoms Dizziness, tremor, asphyxia, unconsciousness, cardiac arrhythmias, cardiac arrest; liquid: frostbite | |
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Target Organs
cardiovascular system, peripheral nervous system |
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| See also: INTRODUCTION See ICSC CARD: 0048 |