Dichlorodifluoromethane |
Synonyms & Trade Names Difluorodichloromethane, Fluorocarbon 12, Freon® 12, Genetron® 12, Halon® 122, Propellant 12, Refrigerant 12 |
CAS No. 75-71-8 |
RTECS No. PA8200000 |
DOT ID & Guide 1028 126 |
FormulaCCl2F2 |
Conversion 1 ppm = 4.95 mg/m3 |
IDLH 15,000 ppm
See: 75718 |
Exposure Limits NIOSH REL: TWA 1000 ppm (4950 mg/m3)
OSHA PEL: TWA 1000 ppm (4950 mg/m3) |
Measurement Methods
NIOSH 1018
See: NMAM or OSHA Methods |
Physical Description Colorless gas with an ether-like odor at extremely high concentrations. [Note: Shipped as a liquefied compressed gas.] |
MW: 120.9 |
BP: -22°F |
FRZ: -252°F |
Sol(77°F): 0.03% |
VP: 5.7 atm |
IP: 11.75 eV |
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Fl.P: NA |
UEL: NA |
LEL: NA |
RGasD: 4.2 |
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| Nonflammable Gas |
Incompatibilities & Reactivities Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesium |
Exposure Routes inhalation, skin and/or eye contact (liquid) |
Symptoms dizziness, tremor, asphyxia, unconsciousness, cardiac arrhythmias, cardiac arrest; liquid: frostbite |
Target Organs cardiovascular system, peripheral nervous system |
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Personal Protection/Sanitation (See protection codes)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
Provide: Frostbite wash |
First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Respiratory support
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Respirator Recommendations NIOSH/OSHA Up to 10000 ppm:
(APF = 10) Any supplied-air respirator Up to 15000 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
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0048
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