1,1-Dichloro-1,2,2,2-tetrafluoroethane

  • 1,1-Dichlorotetrafluoroethane
  • Dichlorotetrafluroethane
  • Freon 114a
  • 1,1,1,2-Tetrafluoro-2,2-dichloroethane
Formula
C2Cl2F4
Structure
Description
Colorless. Odorless.
Uses
Fully halogenated chlorofluorocarbons (cfcs) were scheduled for production phase-out in 1987 by the montreal protocol. Although originally scheduled for 50% production phase-out by the year 2000 in developed countries, the worsening ozone depletion has forced acceleration of the cfc phase-out.

Registry Numbers and Inventories.
CAS
374-07-2
EC (EINECS/ELINCS)
206-774-8
UN (DOT)
1078
Beilstein/Gmelin
1740332
Swiss Giftliste 1
G-6903
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C2Cl2F4
Formula mass
170.92
Melting point, °C
-56.6
Boiling point, °C
4
Vapor pressure, mmHg
1440 (25 C)
Critical temperature
145.6
Critical pressure
32.6
Density
1.455 g/cm3 (25 C)
Solubility in water
137 mg/L (25 C)
Viscosity
0.48 cp (19 C)
Surface tension
2.7790x10-2 n/m @ 216.58 K
Refractive index
1.3092 (0 C)
Partition coefficient, pKow
2.68
Heat of vaporization
24.5 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Neoprene gloves, protective clothing, and eye protection minimize risk of topical contact. The degreasing effect on the skin can be treated with lanolin ointment. Forced air ventilation and level of vapor concentration together with the use of individual breathing devices with independent air supply will minimize risk of inhalation. Lifelines should be worn when entering tanks or other confined spaces.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Prevent any contact with the spilled material. Stop leak if you can do it without risk. Do not direct water at spill or source of leak. If possible, turn leaking containers so that gas escapes rather than liquid. Allow substance to evaporate and vntilate the area.
Stability
No data.

Fire.
Flash Point,°C
-46
Fire fighting
If material on fire or involved in fire: 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. Evacuation: If fire becomes uncontrollable or container is exposed to direct flame - consider evacuation of one-half (12) mile radius.
Fire potential
Non-flammable gas
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground.
Combustion products
All fluorocarbons will undergo thermal decomposition when exposed to flame or red-hot metal.

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
See Skin.

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
1078
Response guide
Hazard class
2.2
USCG CHRIS Code
RFG