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1,1,1,2-Tetrachloro-2,2-difluoroethane

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Synonyms & Trade Names
2,2-Difluoro-1,1,1,2-tetrachloroethane, Freon® 112a, Halocarbon 112a, Refrigerant 112a
CAS No.
76-11-9
RTECS No.
KI1425000
DOT ID & Guide
Formula
CCl₃CClF₂
Conversion
1 ppm = 8.34 mg/m3
IDLH
2000 ppm
See: 76119
Exposure Limits
NIOSH REL
TWA 500 ppm (4170 mg/m3)
OSHA PEL
TWA 500 ppm (4170 mg/m3)
Measurement Methods
NIOSH 1016;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless solid with a slight, ether-like odor. [Note: A liquid above 105°F.]
Molecular Weight
203.8
Boiling Point
197°F
Melting Point
105°F
Solubility
0.01%
Vapor Pressure
40 mmHg
Ionization Potential
?
Specific Gravity
1.65
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Solid
Incompatibilities & Reactivities
Chemically-active metals such as potassium, beryllium, powdered aluminum, zinc, calcium, magnesium & sodium; acids
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin; central nervous system depression; pulmonary edema; drowsiness; dyspnea (breathing difficulty)
Target Organs
Eyes, skin, respiratory system, central nervous system
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 2000 ppm:
(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus 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   ICSC CARD: 1420
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health