# NIOSH Pocket Guide to Chemical Hazards
1,1,2,2-Tetrachloro-1,2-difluoroethane | CAS 76-12-0
CCl2FCCl2F | RTECS KI1420000
Synonyms & Trade Names 1,2-Difluoro-1,1,2,2-tetrachloroethane; Freon® 112; Halocarbon 112; Refrigerant 112 | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 500 ppm (4170 mg/m3)
OSHA PEL: TWA 500 ppm (4170 mg/m3)
IDLH 2000 ppm | Conversion 1 ppm = 8.34 mg/m3
Physical Description Colorless solid or liquid (above 77°F) with a slight, ether-like odor.
MW: 203.8 | BP: 199°F | MLT: 77°F | Sol(77°F): 0.01%
VP: 40 mmHg | IP: 11.30 eV |  | Sp.Gr: 1.65
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Solid
Incompatibilities & Reactivities Chemically-active metals such as potassium, beryllium, powdered aluminum, zinc, magnesium, calcium & sodium; acids
Measurement Methods NIOSH 1016; OSHA 7
Personal Protection & Sanitation 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
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms In animals: irritation eyes, skin; conjunctivitis; pulmonary edema; narcosis
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION