Dichlorodifluoromethane
Synonyms & Trade Names
Difluorodichloromethane, Fluorocarbon 12, Freon® 12, Genetron® 12, Halon® 122, Propellant 12, Refrigerant 12Exposure Limits
NIOSH REL
TWA 1000 ppm (4950 mg/m3)OSHA PEL
TWA 1000 ppm (4950 mg/m3)Physical Description
Colorless gas with an ether-like odor at extremely high concentrations. [Note: Shipped as a liquefied compressed gas.]Molecular Weight
120.9Boiling Point
-22°FFreezing Point
-252°FSolubility
(77°F): 0.03%Vapor Pressure
5.7 atmIonization Potential
11.75 eVFlash Point
NAUpper Exposive Limit
NALower Explosive Limit
NARelative Gas Density
4.2Incompatibilities & Reactivities
Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesiumExposure Routes
inhalation, skin and/or eye contact (liquid)Symptoms
dizziness, tremor, asphyxia, unconsciousness, cardiac arrhythmias, cardiac arrest; liquid: frostbiteTarget Organs
cardiovascular system, peripheral nervous systemPersonal Protection/Sanitation
(See protection codes)Skin:Frostbite
Eyes:Frostbite
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
Provide:Frostbite wash
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
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division