2,2-Dichloro-1,1,1-trifluoroethane

  • FC123
  • Freon 123
  • HCTC123
Formula
C2HCl2F3
Structure
Description
Clear, colorless liquid with a slight ethereal odor.
Uses
Refrigerant to replace cfc-11 in commercial chillers and air conditioning units.

Registry Numbers and Inventories.
CAS
306-83-2
EC (EINECS/ELINCS)
206-190-3
RTECS
KI1108000
RTECS class
Tumorigen; Drug; Mutagen; Reproductive Effector; Primary Irritant
Beilstein/Gmelin
1736763
Beilstein Reference
4-01-00-00135
Swiss Giftliste 1
G-4639
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2HCl2F3
Formula mass
152.93
Melting point, °C
-107
Boiling point, °C
27
Vapor pressure, mmHg
633 (25 C)
Critical temperature
184
Critical pressure
36.22
Density
1.4885 g/cm3 (10 C)
Solubility in water
1.5 g/L
Viscosity
0.0111 cp (35 C)
Surface tension
6.97 g/s2 (100 C)
Refractive index
1.3392 (10 C)
pKa/pKb
2.307 (pKa)
Partition coefficient, pKow
1.75
Heat of vaporization
26.4 kJ/mol

Hazards and Protection.
Storage
Stor cylinders in a dry, well vented area, way from heat and traffic..
Handling
Protect cylinders aganst damage. ground sylinders. Do not use near incompatible materials.
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. Forced air ventilation @ level of vapor concentration together with 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
Self contained breathing apparatus.
Small spills/leaks
Proper protective equipment should be used. Stop leak if you can do so without risk. Allow to evaporate. Rinse area with soap and watter.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Hydrogen fluoride, phosgene, hydrogen chloride and carbonyl fluoride.

Fire.
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. Use agent most appropriate to extinguish fire.
Combustion products
All fluorocarbons will undergo thermal decomposition when exposed to flame or red-hot metal.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
3
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
Mild irritation.

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.
36. Halogenated hydrocarbons