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Chemical Sampling Information (CSI)
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General Description

Synonyms: Refrigerant 112a; Halocarbon 112a; 2,2-Difluoro-,1,1,1,2-tetrachloroethane

OSHA IMIS Code Number: 2337

Chemical Abstracts Service (CAS) Registry Number: 76-11-9

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: KI1425000; 33588

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN1078 Refrigerant Gas, NOS

NIOSH Pocket Guide to Chemical Hazards, 1,1,1,2-Tetrachloro-2,2-Difluoroethane: Chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:
colorless liquid or solid with a slight ether-like odor
molecular weight: 204
boiling point: 197°F
vapor pressure: 40 mm
melting point: 105°F
Incompatibilities: Chemically active metals: sodium, potassium, beryllium, powdered aluminum, zinc, magnesium

Exposure Limits

OSHA Permissible Exposure Limit (PEL):
General Industry: 500 ppm, 4170 mg/m3

Construction Industry: 500 ppm, 4170 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 500 ppm, 4170 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 500 ppm TWA


Health Factors

Potential Symptoms: CNS depression; pulmonary edema; eye, skin irritation; drowsiness; dyspnea

Health Effects: Irritation-Eyes, Skin---Mild (HE16); Narcosis (HE8)

Affected Organs: Respiratory system, skin

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
    analytical solvent: Carbon Disulfide
    maximum volume: 2 Liters
    maximum flow rate: 0.035 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 1 (NIOSH 1016) [21 KB PDF, 4 pages]
    sampling and analytical error: 0.11
    method classifications: Partially Validated
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Page last updated: 05/19/2000

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