Dichloromonofluoromethane
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CAS
75-43-4
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CHCl2F
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RTECS
PA8400000
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Synonyms & Trade Names
Dichlorofluoromethane; Fluorodichloromethane; Freon® 21; Genetron® 21; Halon® 112; Refrigerant 21
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DOT ID & Guide
1029 / 126
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Exposure
Limits
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NIOSH REL: TWA 10 ppm (40 mg/m3)
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OSHA PEL†: TWA 1000 ppm (4200 mg/m3)
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IDLH
5000 ppm
See: 75434
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Conversion
1 ppm = 4.21 mg/m3
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Physical Description
Colorless gas with a slight, ether-like odor. [Note: A liquid below 48°F. Shipped as a liquefied compressed gas.]
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MW: 102.9
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BP: 48°F
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FRZ: -211°F
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Sol(86°F): 0.7%
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VP(70°F): 1.6 atm
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IP: 12.39 eV
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RGasD: 3.57
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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; acid; acid fumes
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Measurement Methods
NIOSH 2516
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
Up to 100 ppm:
(APF = 10) Any supplied-air respirator
Up to 250 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 500 ppm:
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Up to 5000 ppm:
(APF = 1000) Any supplied-air respirator operated in a pressure-demand or other positive-pressure mode
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
Asphyxia, cardiac arrhythmias, cardiac arrest; liquid: frostbite
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Target Organs
respiratory system, cardiovascular system
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See also: INTRODUCTION
See ICSC CARD: 1106 |
