degradation product in several of the candidate agents for fire extinguishment Thus far, no biotic or abiotic destruction mechanism has been clearly established for CF3COOH, and consequently it is thought to be quite stable in water.60 CF3COOH is not toxic toward animals but does have a mild herbicidal effect.61 The global average concentration of CF 3COOH expected in rainfall as a result of the atmospheric degradation of HFCs is many orders of magnitude below that observed to have an impact on plant systems.62 However, uncertainties concerning the persistence of CF3COOH in ground water allow for the possibility that CF3COOH could accumulate in seasonal wetlands over long time periods ( years).63 Very recently, Frank et al.64 have reported the detection of CF3COOH in lake, river, spring, and ocean water samples at levels which are orders of magnitude greater than can be accounted for by man-made emissions. The work of Frank et al. implies that there are large unknown sources of CF3COOH. It seems unlikely that the concentration of CF3COOH formed during the atmospheric degradation of the halon replacement compounds will have any significant adverse global environmental impact. Research is needed to better establish the environmental inventory and fate of CF3COOH.

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