1,1,1,2-TETRACHLORO-2,2-DIFLUOROETHANE†

Chemical Identification
Chemical Identification
CAS # 76-11-9
Formula

CCl₃CClF₂

Synonyms

2,2-difluoro-1,1,1,2-tetrachloroethane; Freon(R) 112a; Halocarbon 112a; Refrigerant 112a

Physical Properties
Physical Properties
Physical description Colorless solid with a slight, ether-like odor.
Boiling point 197°F Molecular weight 203.8
Freezing point/melting point 105°F Vapor pressure 40 mmHg
Flash point Vapor density
Specific gravity 1.65 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 2337
Sampling group
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01]
Sampling time*
Sampling volume (TWA)*

0.5-2 L

Sampling flow rate (TWA)*

0.01-0.035 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference NIOSH 1016 (partially validated)
Notes
Special requirements
 

 

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
 

 

Bulk Method
Bulk Method
 

 

On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 

500 ppm (4170 mg/m³)

REL-TWA
 

500 ppm (4170 mg/m³)

TLV-TWA
 

100 ppm [2007]

PEL-TWA
 

500 ppm (4170 mg/m³)

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

 

PEL-STEL
 

 

PEL-C
 

 

REL-C
 

 

TLV-C
 

 

PEL-C
 

 

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Skin notation
 

N

Notes:
 

See 29 CFR 1910.1000 Table Z-1.

Notes:
 

 

Notes:
 

 

Notes:
 

 

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: Not listed Notes:
 

 

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - 1,1,1,2-tetrachloro-2,2-difluoroethane

NIOSH: Pocket Guide to Chemical Hazards - 1,1,1,2-Tetrachloro-2,2-difluoroethane

Literature References

 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 1,1,1,2-Tetrachloro-2,2-difluoroethane. See annual publication for most recent information.

Last Updated Date : 12/19/2018