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Environmental fate & pathways

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HFO-1234yf is phototransformed in the air with ~ 100% degradation observed by 11 days. Based on structure activity analysis, HFO-1234yf would not be expected to hydrolyze in water.

The OH initiated oxidation of CF3CF=CH2gives CF3C(O)F and HCHO in almost quantitative yields. CF3C(O)F is removed from the atmosphere via hydrolysis that occurs at a time scale of about 10 days to give CF3C(O)OH, just like HFC-134a (CF3CH2F). The available data suggest that while CF3C(O)OH is not a natural component of the freshwater environment, it is a natural component of the background oceanic environment, and any additional burden associated with CF3CF=CH2oxidation will be of negligible environmental significance. Similarly HC(O)H decomposes to H2O and CO, the latter oxidizing to CO2in the atmosphere.

HFO-1234yf is not readily biodegradable, has low global warming potential (GWP=4) and will not deplete the ozone (ozone depleting potential = 0).