cessation of all life (metabolic) processes. Death may involve the organism as a whole (somatic death) or may be confined to cells and tissues within the organism. Causes of death in human beings include injury, acute or chronic disease, and neoplasia (cancer).
R409A is a blend of HCFC refrigerants introduced to retrofit R12 in air conditioning and refrigeration applications.CFCâs are commonly accepted as having an overall detrimental effect on the environment through both their ozone depletion potential and global warming potential and consequently are being phased out completely.
Today, the term Freon actually refers to a wide range of refrigerant chemicals with different physical and chemical properties. By convention, refrigerant names use the letter R accompanied by a number that describes the molecular structure. Common refrigerants include R-11, R-12, R-22 and R-134A. R-22 refrigerant, the focus of the current EPA phase-out, is chemically known as chlorodifluoromethane. First introduced in the mid-twentieth century, R-22 has been the refrigerant of choice for home air conditioners for decades.