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FLAMMABILITY None of the Freon compounds are flammable or explosive However, mixtures with flammable liquids or gases may be flammable and should be handled with caution Partially halogenated compounds may also be flammable and must be individually examined
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TOXICITY One of the most important qualities of the Freon fluorocarbon compounds is their low toxicity under normal conditions of handling and usage However, the possibility of serious injury or death exists under unusual or uncontrolled exposures or in deliberate abuse by inhalation of concentrated vapors The potential hazards of fluorocarbons are summarized in Table 64
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SKIN EFFECTS Liquid fluorocarbons with boiling points below 32 degrees F (0 degrees C) may freeze the skin, causing frostbite on contact Suitable protective gloves and clothing give insulation protection Eye protection should be used In the event of frostbite, warm the affected area quickly to body temperature Eyes should be flushed
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TABLE 64
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Potential hazards of fluorocarbons Potential Hazard Inhalation of toxic decomposition products Inhalation of concentrated vapors can be fatal Safeguard Good ventilation Toxic decomposition products serve as warning agents Avoid misuse Forced-air ventilation at the level of vapor concentration Individual breathing devices with air supply Lifelines when entering tanks or other confined areas Do not administer epinephrine or other similar drugs Gloves and protective clothing
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Condition Vapors may decompose in flames or in contact with hot surfaces Vapors are four to five times heavier than air High concentrations may tend to accumulate in low places
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Deliberate inhalation to produce intoxication Some fluorocarbon liquids tend to remove natural oils from the skin Lower boiling liquids may be splashed on skin Liquids may be splashed into eyes
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Can be fatal Irritation of dry, sensitive skin
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Freezing Lower boiling liquids may cause freezing Higher boiling liquids may cause temporary irritation and if other chemicals are dissolved, may cause serious damage Violent explosion may occur
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Gloves and protective clothing Wear eye protection Get medical attention Flush eyes for several minutes with running water
Contact with highly reactive metals
Test the proposed system and take appropriate safety precautions
Refrigerants
copiously with water Hands may be held under armpits or immersed in warm water Get medical attention immediately Fluorocarbons with boiling points at or above ambient temperature tend to dissolve protective fat from the skin This leads to skin dryness and irritation, particularly after prolonged or repeated contact Such contact should be avoided by using rubber or plastic gloves Eye protection and face shields should be used if splashing is possible If irritation occurs following contact, seek medical attention
ORAL TOXICITY Fluorocarbons are low in oral toxicity as judged by single-dose administration or repeated dosing over long periods However, direct contact of liquid fluorocarbons with lung tissue can result in chemical pneumonitis, pulmonary edema, and hemorrhage Fluorocarbons 11 and 113, like many petroleum distillates, are fat solvents and can produce such an effect If products containing these fluorocarbons were accidentally or purposely ingested, induction of vomiting would be contraindicated
CENTRAL-NERVOUS-SYSTEM (CNS) EFFECTS Inhalation of concentrated fluorocarbon vapors can lead to CNS effects comparable to the effects of general anesthesia The first symptom is a feeling of intoxication This is followed by a loss of coordination and unconsciousness Under severe conditions, death can result If these symptoms are felt, the exposed individual should immediately go or be moved to fresh air Medical attention should be sought promptly Individuals exposed to fluorocarbons should NOT be treated with adrenaline (epinephrine)
CARDIAC SENSITIZATION Fluorocarbons can, in sufficient vapor concentration, produce cardiac sensitization This is a sensitization of the heart to adrenaline brought about by exposure to high concentrations of organic vapors Under severe exposure, cardiac arrhythmias may result from sensitization of the heart to the body s own levels of adrenaline This is particularly so under conditions of emotional or physical stress, fright, panic, and so forth Such cardiac arrhythmias may result in ventricular fibrillation and death Exposed individuals should immediately go or be removed to fresh air, where the hazard of cardiac effects will rapidly decrease Prompt medical attention and observation should be provided following accidental exposures A worker adversely affected by fluorocarbon vapors should NOT be treated with adrenaline (epinephrine) or similar heart stimulants, since these would increase the risk of cardiac arrhythmias
THERMAL DECOMPOSITION Fluorocarbons decompose when exposed directly to high temperatures Flames and electrical-resistance heaters, for example, will chemically decompose fluorocarbon vapors Products of this decomposition in air include halogens and halogen acids (hydrochloric, hydrofluoric, and hydrobromic), as well as other irritating
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