Is the refrigerant R-507А safe?
There has been undertaken the analysis of some problems of handling synthesized Refrigerant - freon R-507а. The urgency of environmental problems in modern refrigeration practices associated with finding the most safe for humans and the environment refrigerant. Currently, as such a refrigerant is proposed to use Freon R-507A. Freon R-507A refers to substances hazard class IV (low hazard substances). Freon R-507A is a mixture of two compounds: R-125 - CHF<sub>2</sub> - CF<sub>3</sub> (pentafluoroethane) and R-143a - CH<sub>3 </sub>- CF<sub>3</sub> (tetrafluoroethane). Fluoride is essential chemical element of the human body and normally stimulates some vital biochemical processes. The excess fluorine creates urgent problems for all living things and the environment. Many of the fluorine compounds are toxic and, therefore, 99% of them have very low MACs. Fluoride exerts its toxic properties in the amounts an average of 20 mg, and when ingested doses of 2-5 g may be fatal. Chronic intoxication fluoride on the human body, leading to the development of such diseases as fluorosis. Emissions of fluorinated some CFCs in the atmosphere are a major cause of global warming on our planet. Produced fluorinated refrigerants must sootvetsvovat technical conditions. On the product, strictily conform to the past and biological control by national standards, set the maximum permissible concentration. In domestic publications on Freon R-507A is no limit values. Freon R-507A is not included in the list of sanitary rules and norms - SanPiN 2.3.2. 560-96, and therefore prohibited for use in the food industry. Consequently, Freon R-507A far unsafe for humans and for the environment.