R 22 freon - inert in the chemical relation, nonflammable, not explosive liquefied under pressure, gas. Under normal conditions R 22 Freon is stable substance which under the influence of temperatures above 400 °C can decay with formation of highly toxic products: tetrafluorethylene, hydrogen chloride, hydrogen fluoride. When heating from above the 250th hail. Celsius very poisonous products, for example COCl2 phosgene which in the years of World War I was used as fighting toxic agent are formed. It is used as coolant in so-so and low-temperature refrigerating systems of the industrial, trade and household equipment.
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