| Product Identification | Back to Contents | 【Product Name】
Freon 142b | 【Synonyms】
1,1-Difluoro-1-chloroethane
Freon 142
HCFC-142b | 【CAS】
75-68-3 | 【Formula】
C2H3ClF2 | 【Molecular Weight】
100.5 | 【EINECS】
200-891-8 | 【RTECS】
KH7650000 | 【RTECS Class】
Mutagen; Reproductive Effector | 【Beilstein/Gmelin】
1731584 | 【Beilstein Reference】
4-01-00-00127 |
| Physical and Chemical Properties | Back to Contents | 【Appearance】
Colorless gas with a faint odor. | 【Solubility in water】
Slightly soluble | 【Melting Point】
-130.8 | 【Boiling Point】
-9.2 | 【Vapor Pressure】
7786 (25 C) | 【Density】
1.107 g/m<sup>3<sup> (25 C) | 【Partition Coefficient】
1.8 | 【Heat Of Vaporization】
23.27 kJ/mol | 【Usage】
Aerosol propellant for non-food use, chemical intermediate for vinylidene fluoride. | 【Vapor Density】
3.49 |
| 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】
Grounding and bonding required. Keep separated from incompatible substances. Avoid heat, flames, sparks and other sources of ignition. | 【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. |
| 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. Vapors may travel to source of ignition and flash back. Containers may explode when heated. Ruptured cylinders may rocket. | 【UN (DOT)】
2517 |
| Exposure Controls/Personal Protection | Back to Contents | 【Personal Protection】
Wear appropriate chemical protective gloves and goggles. | 【Respirators】
Wear positive pressure self-contained breathing apparatus when fighting fires involving this material. | 【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. | 【Poison Class】
5 |
| Fire Fighting Measures | Back to Contents | 【Flash Point】
-65 | 【Autoignition】
632 | 【Fire Fighting】
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. | 【Upper exp. limit】
17.9 | 【Lower exp. limit】
6.2 | 【Fire Potential】
EXTREMELY FLAMMABLE. |
| Accidental Release Measures | Back to Contents | 【Small spills/leaks】
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. |
| Stability and Reactivity | Back to Contents | 【Incompatibilities】
Can react violently with strong reducing agents such as the very active metals and the active metals Can react with strong oxidizing agents or weaker oxidizing agents under extremes of temperature. | 【Stability】
Stable at normal temperatures and pressure. | 【Decomposition】
When heated to decomposition, emits toxic fumes of hydrogen fluoride and hydrogen chloride. Under certain conditions, fluorocarbon vapors may decompose on contact with flames or hot surfaces, creating potential hazard of inhalation of toxic decomposition products. | 【Combustion Products】
All fluorocarbons will undergo thermal decomposition when exposed to flame or red-hot metal. |
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