Skip directly to local search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options
CDC Home

Enter search terms separated by spaces.

Difluorodibromomethane

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.
MW:
209.8
BP:
76°F
FRZ:
-231°F
Sol:
Insoluble
VP:
620 mmHg
IP:
11.07 eV
Sp.Gr(59°F): 2.29
Fl.P:
NA
UEL:
NA
LEL:
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   See ICSC CARD: 1419
 

Order NIOSH Publications

Contact Us:
USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO