| Product Identification | Back to Contents | 【Product Name】
Difluorochloromethane | 【Synonyms】
Difluorochloromethane
Freon 22
Monochlorodifluoromethane
Refrigerant gas R-22 | 【CAS】
75-45-6 | 【Formula】
CHClF2 | 【Molecular Weight】
86.47 | 【EINECS】
200-871-9 | 【RTECS】
PA6390000 | 【RTECS Class】
Tumorigen; Mutagen; Reproductive Effector | 【Beilstein/Gmelin】
1731036 | 【Beilstein Reference】
4-01-00-00032 |
| Physical and Chemical Properties | Back to Contents | 【Appearance】
Chlorodifluoromethane is a colorless gas with an ethereal odor. | 【Solubility in water】
3 g/L | 【Melting Point】
-157.4 | 【Boiling Point】
-40.8 | 【Vapor Pressure】
6290 (25 C) | 【Density】
1.41 g/cm3 (20 C) | 【Partition Coefficient】
1.08 | 【Heat Of Vaporization】
20.8 kJ/mol | 【Usage】
Propellant, fumigant, insecticide. | 【Vapor Density】
2.98 | 【Refractive Index】
1.264 (22 C) |
| First Aid Measures | Back to Contents | 【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. |
| Handling and Storage | Back to Contents | 【Storage】
Keep container tightly closed. Keep away from heat, sparks and flames. | 【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. |
| Hazards Identification | Back to Contents | 【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. | 【Ingestion】
Nausea may develop. Ingestion of a small amount of trichlorofluoromethane resulted in necrosis and perforation of the stomach in one patient. | 【Hazards】
Vapors from liquefied gas are initially heavier than air and spread along ground. | 【UN (DOT)】
1018 |
| Exposure Controls/Personal Protection | Back to Contents | 【Personal Protection】
Wear appropriate clothing to prevent any reasonable probability of skin contact. Wear eye protection to prevent any possibility of eye contact. | 【Respirators】
Wear positive pressure self-contained breathing apparatus (SCBA). | 【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. | 【Exposure limit(s)】
TLV (as TWA): 1000 ppm; 3540 mg/m3 (ACGIH 1992-1993). MAK: 500 ppm; 1800 mg/m3; IV, C (1992). NIOSH REL: TWA 1000 ppm (3500 mg/m3) ST 1250 ppm (4375 mg/m3) | 【Poison Class】
5 |
| Fire Fighting Measures | Back to Contents | 【Flash Point】
-78 | 【Autoignition】
632 | 【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. | 【Upper exp. limit】
26.9 | 【Fire Potential】
Slightly flammable. |
| Stability and Reactivity | Back to Contents | 【Incompatibilities】
Incompatible with alkalis, alkaline earth metals (e.g., powdered aluminum, sodium, potassium, zinc). | 【Stability】
Stable at normal temperatures and pressure. | 【Decomposition】
Decomposition gases are toxic and irritating. When heated to decomp. They evolve highly toxic. Fumes of hydrogen chloride and hydrogen fluoride. All fluorocarbons will undergo thermal decomposition when exposed to flame or red-hot metal. Decomposition products of the chlorofluorocarbons will include hydrofluoric and hydrochloric acid along with smaller amounts of phosgene and carbonyl fluoride. The last compound is very unstable to hydrolysis and quickly changes to hydrofluoric acid and carbon dioxide in the presence of moisture. | 【Combustion Products】
Decomposition gases are toxic and irritating. |
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