1,1-Dichloro-1-fluoroethane

  • Dichlorofluoroethane
  • Freon 141b
Formula
C2H3Cl2F
Structure
Description
Colorless liquid. Weak ethereal odor.
Uses
Foam blowing, cleaning solvent.

Registry Numbers and Inventories.
CAS
1717-00-6
RTECS
KI0997000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
9274
Beilstein/Gmelin
1731585
Beilstein Reference
4-01-00-00134
Swiss Giftliste 1
G-100334
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C2H3Cl2F
Formula mass
116.95
Melting point, °C
-103.5
Boiling point, °C
31.9
Vapor pressure, mmHg
525 (21 C)
Vapor density (air=1)
4.1
Critical temperature
204
Critical pressure
41.39
Density
1.25 g/cm3 (10 C)
Solubility in water
1.7 g/L
Viscosity
0.409 cp at 25C
Refractive index
1.3498 (50 C)
Partition coefficient, pKow
2.3
Heat of vaporization
26.1 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry location, away from incompatible materials. Avoid aluminum containers.
Handling
Containers of this material may be hazardous when emptied. Since emptied containers retain product residues (vapor, liquid, and/or solid), all hazard precautions given in the data sheet must be observed. Warning. Sudden release of hot organic chemical vapors or mists from process equipment operating at elevated temperature and pressure, or sudden ingress of air into vacuum equipment, may result in ignitions without the presence of obvious ignition sources.
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
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Stop leak if you can do it without risk. Small Liquid SpillsTake up with sand, earth or other noncombustible absorbent material.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Incompatible with strong oxidizing and reducing agents Incompatible with some amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.
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 fumes of hydrogen chloride and hydrogen fluoride.

Fire.
Autoignition, °C
550
Upper exp. limit, %
17.7
Lower exp. limit, %
7.6
Fire fighting
SMALL FIRES: Dry chemical, carbon dioxide or water spray. LARGE FIRES: Dry chemical, carbon dioxide, alcohol-resistant foam or water spray. Move containers from fire area if you can do it without risk. Dike fire control water for later disposal; do not scatter the material. FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire.
Fire potential
May burn but does not ignite readily.
Hazards
Most vapors are heavier than air. Air/vapor mixtures may explode when ignited. Container may explode in heat of fire.
Combustion products
All fluorocarbons will undergo thermal decomposition when exposed to flame or red-hot metal.
Health
2
 
Flammability
2
 
 
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
9274
Response guide
Hazard class
9
36. Halogenated hydrocarbons