2,3,3,3-Tetrafluoropropene

Common card · No. 342013

2,3,3,3-Tetrafluoropropene, HFO-1234yf, is a hydrofluoroolefin (HFO) with molecular formula CH2=CFCF3. Its primary application is as a refrigerant with low global warming potential (GWP). As a refrigerant, it is designated R-1234yf and marketed under the names Opteon YF by Chemours and as Solstice yf by Honeywell. R-1234yf is also a component of zeotropic refrigerant blend R-454B. HFO-1234yf has a GWP less than carbon dioxide, itself 1,430 times less potent than R-134a. For this reason, 2,3,3,3‑tetrafluoropropene is the pre-eminent replacement for R-134a in vehicular air conditioners. As of 2022, 90% of new U.S. vehicles are estimated to use HFO-1234yf. Unlike previous vehicular refrigerants, 2,3,3,3‑tetrafluoropropene is flammable; how much risk this poses is discussed below. One drawback is it breaks down into short-chain perfluorinated carboxylic acids (PFCAs), which are persistent organic pollutants.

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