Dibromodifluoromethane

  • Difluorodibromomethane
  • Freon 12B2
Formula
CBr2F2
Structure
Description
Colorless heavy liq. Characteristic odor.
Uses
Fire-extinguishing agent.

Registry Numbers and Inventories.
CAS
75-61-6
EC (EINECS/ELINCS)
200-885-5
RTECS
PA7525000
RTECS class
Other
UN (DOT)
1941
Beilstein/Gmelin
1732515
Beilstein Reference
4-01-00-00080
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CBr2F2
Formula mass
209.83
Melting point, °C
-146.1
Boiling point, °C
24
Vapor pressure, mmHg
724 (25 C)
Vapor density (air=1)
7.2
Critical temperature
197
Critical pressure
51.3
Density
2.29 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
0.50 cp (18 C)
Surface tension
18.45 g/s2 (18 C)
Refractive index
1.3989 (15 C)
Heat of vaporization
33.2 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator (approx 4 C).
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Provide ventilation.
Stability
No data.
Incompatibilities
Strong oxidizing agents, aluminum, magnesium, zinc, potassium, sodium.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, hydrogen fluoride, hydrogen bromide.

Fire.
Flash Point,°C
-30
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Substance is nonflammable. Extinguishing media: For large fires, use water spray, fog or regular foam. For small fires, use dry chemical, carbon dioxide, water spray or regular foam. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Nonflammable.
Hazards
Some may burn but none ignite readily. May polymerize explosively when heated or involved in a fire. Containers may explode when heated. Some may be transported hot.
Combustion products
Under certain conditions, fluorocarbon vapors may decompose on contact with flames or hot surfaces, creating the potential hazard of inhalation of toxic decomposition products.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: TWA 100 ppm (860 mg/m3) OSHA PEL: TWA 100 ppm (860 mg/m3) IDLH 2000 ppm
Exposure effects
   Ingestion
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.
   Inhalation
The toxicological properties of this substance have not been fully investigated. Inhalation of vapors or dust is extremely irritating.
   Skin
May cause skin irritation.
   Eyes
Mist or vapor is extremely irritating. May cause burning of eyes and flow of tears.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1941
Response guide
Hazard class
9
Packing Group
III
 
36. Halogenated hydrocarbons
Std. Transport #
4941117