Bromochlorodifluoromethane

  • Halon 1211
  • Chlorodifluorobromomethane
  • Freon 12 B 1
  • R 12 B 1
Formula
CBrClF2
Structure
Description
Colorless gas. Almost odorless.
Uses
Mechanical vapor compression systems use fluorocarbons for refrigeration & air conditioning & account for majority of refrigeration capability in us. Fluorocarbons are used as refrigerants in home appliances, mobile air conditioning units, retail food refrigeration systems & chillers. Fluorocarbons.

Registry Numbers and Inventories.
CAS
353-59-3
EC (EINECS/ELINCS)
206-537-9
RTECS
PA5270000
RTECS class
Mutagen; Human Data
UN (DOT)
1974
Beilstein/Gmelin
1732514
Beilstein Reference
4-01-00-00075
Swiss Giftliste 1
G-4637
US TSCA
Listed

Properties.
Formula
CBrClF2
Formula mass
165.37
Melting point, °C
-159.5
Boiling point, °C
1.5
Vapor pressure, mmHg
1720 (25 C)
Vapor density (air=1)
5.7
Density
1.850 g/m3 (liquid density)
Solubility in water
Insoluble
Viscosity
1.68 mPa.s
Surface tension
4.7544x10-2 n/m @ 113.65 K
Partition coefficient, pKow
2.37
Heat of vaporization
24.0 kJ/mol

Hazards and Protection.
Storage
Stoor in a cool location with good ventillation.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Many of the fluorocarbons are good solvents of skin oil, so protective ointment should be used. Neoprene gloves, protective clothing, and eye protection minimize risk of topical contact. Degreasing effect on skin can be treated with lanolin ointment.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Attempt to stop leak if without undue personnel hazard.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Can react violently with strong reducing agents such as the very active metals and the active metals Can react with strong oxidizing agents or weaker oxidizing agents under extremes of temperature.
Decomposition
When heated to decomposition it emits very toxic fumes of hydrogen bromide, hydrogen chloride and hydrogen fluoride. Under certain conditions, fluorocarbon vapors may decompose on contact with flames or hot surfaces, creating the potential hazard of inhalation of toxic decomposition products.

Fire.
Flash Point,°C
-45
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Do not use water on material itself. Use water spray to knock-down vapors.
Fire potential
May burn but does not ignite readily.
Hazards
Containers may explode when heated. Ruptured cylinders may rocket.
Combustion products
All fluorocarbons will undergo thermal decomposition when exposed to flame or red-hot metal.
Health
0
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
5
Exposure effects
Headache, dizziness, and disorientation are common. Cerebral edema may be found on autopsy. Dichlorodifluoromethane was not teratogenic in rats and rabbits. <br>The reproductive effects of 1,1,1,2-tetrafluoroethane were studied in rats. No adverse effects on reproductive performance was noted or on the development, maturation or reproductive performance of up to two successive generations.
   Ingestion
Nausea may develop. Ingestion of a small amount of trichlorofluoromethane resulted in necrosis and perforation of the stomach in one patient.
   Inhalation
Pulmonary irritation, bronchial constriction, cough, dyspnea, and chest tightness may develop after inhalation. Chronic pulmonary hyperreactivity may occur. Adult respiratory distress syndrome has been reported following acute inhalational exposures. Pulmonary edema is an autopsy finding in fatal cases.
   Skin
Dermal contact may result in defatting, irritation or contact dermatitis. Severe frostbite has been reported as an effect of freon exposure. Injection causes transient pain, erythema and edema.
   Eyes
EYES - Eye irritation occurs with ambient exposure. Frostbite of the lids may be severe. NOSE - Nasal irritation occurs with ambient exposure. THROAT - Irritation occurs. Frostbite of the lips, tongue, buccal mucosa and hard palate developed in a man after deliberate inhalation.

First aid
 
   Ingestion
These substances may cause frostbite to the upper airway and gastrointestinal tract after ingestion. Administer oxygen and manage airway as clinically indicated. Emesis, activated charcoal, and gastric lavage are not recommended.
   Inhalation
Provide a quiet calm atmosphere to prevent adrenaline surge if the patient is seen before the onset of cardiac arrhythmias. Minimize physical exertion.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. If frostbite has occurred, refer to dermal treatment in the main body of this document for rewarming.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. Ophthamologic consultation should be obtained in any symptomatic patients.

Transport.
UN number
1974
Response guide
Hazard class
2.2
36. Halogenated hydrocarbons
Std. Transport #
4904517