DIFLUORODIBROMOMETHANE†

Chemical Identification
Chemical Identification
CAS # 75-61-6
Formula

CBr₂F₂

Synonyms

dibromodifluoromethane; Freon12B2; Halon1202

Physical Properties
Physical Properties
Physical description Colorless, heavy liquid or gas (above 76°F) with a characteristic odor.
Boiling point 76°F Molecular weight 209.8
Freezing point/melting point -231°F Vapor pressure 620 mmHg
Flash point Vapor density
Specific gravity 2.29 at 59° Ionization potential 11.07 eV
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.) 0922
Sampling group
Sampler/Sampling media 2 CSC tubes (100/50 mg sections, 20/40 mesh) in series [SKC 226-01]
Sampling time*
Sampling volume (TWA)*

2.5-10 L

Sampling flow rate (TWA)*

0.01-0.2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference NIOSH 1012 (fully 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 Infrared spectrophotometer
Model/Type Miran 1A & 1B
Sampling information
(see manufacturer instructions)
0.04 ppm@9.2 µm
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

100 ppm (860 mg/m³)

REL-TWA

100 ppm (860 mg/m³)

TLV-TWA

100 ppm [1962]

PEL-TWA

100 ppm (860 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

2000 ppm

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 - Dibromodifluoromethane

NIOSH: Pocket Guide to Chemical Hazards - Difluorodibromomethane

Literature References

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

Last Updated Date : 12/28/2020