1-Chloro-1,2,2,2-tetrafluoroethane

  • 2-Chloro-1,1,1,2-tetrafluoroethane
  • Hydrochlorofluorocarbon 124
  • HCFC-124
  • Refrigerant gas R-124
  • Chlorotetrafluoroethane
  • Freon 124
Formula
C2HClF4
Structure
Description
Nearly odorless.
Uses
It may be used as a replacement for chlorofluorocarbons.

Registry Numbers and Inventories.
CAS
2837-89-0
EC (EINECS/ELINCS)
220-629-6
RTECS
KH7980000
RTECS class
Other
UN (DOT)
1021
Beilstein/Gmelin
1840105
Swiss Giftliste 1
G-174445
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C2HClF4
Formula mass
136.48
Melting point, °C
-117.2
Boiling point, °C
-12
Vapor pressure, mmHg
2933 (25 C)
Vapor density (air=1)
4.7
Critical temperature
122.2
Critical pressure
35.2
Density
1.364 g/cm3 (25 C)
Solubility in water
Slightly soluble
Viscosity
0.453 (21.5 C)
Partition coefficient, pKow
1.9-2.0

Hazards and Protection.
Storage
Store in a clean, dry place.
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. 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
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 presures.
Incompatibilities
Can react violently with strong reducing agents such as the very active metals and the active metals.
Decomposition
Under certain conditions, fluorocarbon vapors may decompose on contact with flames or hot surfaces, creating the potential hazard of inhalation of toxic decomposition products. Dangerous when heated to decomposition. They evolve highly toxic fumes of hydrogen chloride and hydrogen fluoride. Appearance of toxic decomposition products serves as warning of occurrence of thermal decomposition and detection of sharp acrid odor warns of presence.

Fire.
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.
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.
Poison_Class
-
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
Move victim to fresh air. If breathing has stopped, give artificial respiration. If breathing is difficult, give oxygen.
   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
1021
Response guide
Hazard class
2.2
USCG CHRIS Code
MTE
 
Std. Transport #
4904558 4904523