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Dichlorodifluoromethane																				Related Pages
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 ppmSee: 75718

Exposure Limits
			NIOSH RELTWA 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.]													
										
Molecular Weight120.9	
	Boiling Point-22°F
	Freezing Point-252°F
	Solubility(77°F): 0.03%
	Vapor Pressure5.7 atm
	Ionization Potential11.75 eV											
Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
	Relative Gas Density4.2
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
										
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
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 canisterAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0048

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
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