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Difluorodibromomethane

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Synonyms & Trade Names
Dibromodifluoromethane, Freon® 12B2, Halon® 1202
CAS No.
75-61-6
RTECS No.
PA7525000
DOT ID & Guide
1941 171
Formula
CBr₂F₂
Conversion
1 ppm = 8.58 mg/m3
IDLH
2000 ppm
See: 75616
Exposure Limits
NIOSH REL
TWA 100 ppm (860 mg/m3)
OSHA PEL
TWA 100 ppm (860 mg/m3)
Measurement Methods
NIOSH 1012;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless, heavy liquid or gas (above 76°F) with a characteristic odor.
Molecular Weight
209.8
Boiling Point
76°F
Freezing Point
-231°F
Solubility
Insoluble
Vapor Pressure
620 mmHg
Ionization Potential
11.07 eV
Specific Gravity
(59°F): 2.29
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Liquid
Nonflammable Gas
Incompatibilities & Reactivities
Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesium
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
In Animals: irritation respiratory system; central nervous system symptoms; liver damage
Target Organs
respiratory system, central nervous system, liver
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:No recommendation
Remove:When wet or contaminated
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water flush immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 1000 ppm:
(APF = 10) Any supplied-air respirator

Up to 2000 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator 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: 1419
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health