Dichlorodifluoromethane
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CAS
75-71-8
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CCl2F2
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RTECS
PA8200000
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Synonyms & Trade Names
Difluorodichloromethane; Fluorocarbon 12; Freon® 12; Genetron® 12; Halon® 122; Propellant 12; Refrigerant 12
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DOT ID & Guide
1028 / 126
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Exposure
Limits
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NIOSH REL: TWA 1000 ppm (4950 mg/m3)
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OSHA PEL: TWA 1000 ppm (4950 mg/m3)
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IDLH
15,000 ppm
See: 75718
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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
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BP: -22°F
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FRZ: -252°F
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Sol(77°F): 0.03%
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VP: 5.7 atm
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IP: 11.75 eV
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RGasD: 4.2
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Fl.P: NA
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UEL: NA
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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 |
Personal Protection & Sanitation (See protection)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
Provide: Frostbite wash
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First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Respiratory support
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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
Important additional information about respirator selection
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Exposure Routes
inhalation, skin and/or eye contact (liquid)
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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 |
